summaryrefslogtreecommitdiff
path: root/doc/html/thread/changes.html
blob: 810a4f05c6db0d9e05a1f1b103a2cb42f8c08b4d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
<title>History</title>
<link rel="stylesheet" href="../../../doc/src/boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets V1.76.1">
<link rel="home" href="../index.html" title="The Boost C++ Libraries BoostBook Documentation Subset">
<link rel="up" href="../thread.html" title="Chapter&#160;33.&#160;Thread 4.7.0">
<link rel="prev" href="build.html" title="Using and building the library">
<link rel="next" href="future.html" title="Future">
</head>
<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
<table cellpadding="2" width="100%"><tr>
<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../boost.png"></td>
<td align="center"><a href="../../../index.html">Home</a></td>
<td align="center"><a href="../../../libs/libraries.htm">Libraries</a></td>
<td align="center"><a href="http://www.boost.org/users/people.html">People</a></td>
<td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td>
<td align="center"><a href="../../../more/index.htm">More</a></td>
</tr></table>
<hr>
<div class="spirit-nav">
<a accesskey="p" href="build.html"><img src="../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../thread.html"><img src="../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../index.html"><img src="../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="future.html"><img src="../../../doc/src/images/next.png" alt="Next"></a>
</div>
<div class="section">
<div class="titlepage"><div><div><h2 class="title" style="clear: both">
<a name="thread.changes"></a><a class="link" href="changes.html" title="History">History</a>
</h2></div></div></div>
<h4>
<a name="thread.changes.h0"></a>
      <span><a name="thread.changes.version_4_7_0___boost_1_61"></a></span><a class="link" href="changes.html#thread.changes.version_4_7_0___boost_1_61">Version
      4.7.0 - boost 1.61</a>
    </h4>
<p>
      <span class="bold"><strong>Know Bugs:</strong></span>
    </p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/3926" target="_top">#3926</a>
          thread_specific_ptr + dlopen library causes a SIGSEGV.
        </li></ul></div>
<p>
      Please define BOOST_THREAD_PATCH to apply the patch that could unfortunately
      results is a regression as described in <a href="http://svn.boost.org/trac/boost/ticket/12049" target="_top">#12049</a>.
    </p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/4833" target="_top">#4833</a>
          MinGW/test_tss_lib: Support of automatic tss cleanup for native threading
          API not available
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/8600" target="_top">#8600</a>
          wait_for_any hangs, if called with multiple copies of shared_future referencing
          same task
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/9118" target="_top">#9118</a>
          Seg fault on thread join when llvm and libc++ are used
        </li>
</ul></div>
<p>
      Please take a look at <a href="https://svn.boost.org/trac/boost/query?status=assigned&amp;status=new&amp;status=reopened&amp;component=thread&amp;type=!Feature+Requests&amp;col=id&amp;col=summary&amp;order=id" target="_top">thread
      Know Bugs</a> to see the current state.
    </p>
<p>
      Please take a look at <a href="http://www.boost.org/development/tests/master/developer/thread.html" target="_top">thread
      trunk regression test</a> to see the last regression test snapshot.
    </p>
<p>
      <span class="bold"><strong>New Experimental Features:</strong></span>
    </p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/11772" target="_top">#11772</a>
          Add a launch::sync policy
        </li></ul></div>
<p>
      <span class="bold"><strong>Fixed Bugs:</strong></span>
    </p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/11494" target="_top">#11494</a>
          boost::this_thread::yield() is marked as deprecated in the synopsis
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/11562" target="_top">#11562</a>
          (condition_variable_any::wait_until + recursive_mutex + steady_clock) timer
          expires after computer time is set forward on Ubuntu 64-bit
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/12013" target="_top">#12013</a>
          F_pass and FArgs_pass tests segfault
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/12036" target="_top">#12036</a>
          boost::physical_concurrency always returns 0 if BOOST_USE_WINAPI_VERSION
          is not defined
        </li>
</ul></div>
<h4>
<a name="thread.changes.h1"></a>
      <span><a name="thread.changes.version_4_6_0___boost_1_60"></a></span><a class="link" href="changes.html#thread.changes.version_4_6_0___boost_1_60">Version
      4.6.0 - boost 1.60</a>
    </h4>
<p>
      <span class="bold"><strong>Know Bugs:</strong></span>
    </p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/4833" target="_top">#4833</a>
          MinGW/test_tss_lib: Support of automatic tss cleanup for native threading
          API not available
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/8600" target="_top">#8600</a>
          wait_for_any hangs, if called with multiple copies of shared_future referencing
          same task
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/9118" target="_top">#9118</a>
          Seg fault on thread join when llvm and libc++ are used
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/10942" target="_top">#10942</a>
          Boost.Thread fails to build on Cygwin.
        </li>
</ul></div>
<p>
      Please take a look at <a href="https://svn.boost.org/trac/boost/query?status=assigned&amp;status=new&amp;status=reopened&amp;component=thread&amp;type=!Feature+Requests&amp;col=id&amp;col=summary&amp;order=id" target="_top">thread
      Know Bugs</a> to see the current state.
    </p>
<p>
      Please take a look at <a href="http://www.boost.org/development/tests/master/developer/thread.html" target="_top">thread
      trunk regression test</a> to see the last regression test snapshot.
    </p>
<p>
      <span class="bold"><strong>New Experimental Features:</strong></span>
    </p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/11231" target="_top">#11231</a>
          Allow to set continuation future's destructor behavior to non-blocking
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/11424" target="_top">#11424</a>
          Provide shared_timed_mutex as an alternative name for shared_mutex and
          deprecate the use of shared_mutex as a timed mutex
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/11734" target="_top">#11734</a>
          future::then(Cont) should be able to execute the continuation on undetermined
          thread
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/11736" target="_top">#11736</a>
          Allow to use launch::executor on future::then(launch::executor, cont)
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/11737" target="_top">#11737</a>
          Add a launch::inherit policy that can be used on ::then() to use the policy
          of the parent future
        </li>
</ul></div>
<p>
      <span class="bold"><strong>Fixed Bugs:</strong></span>
    </p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/6377" target="_top">#6377</a>
          Condition variable blocks when changing time
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/6787" target="_top">#6787</a>
          boost::thread::sleep() hangs if system time is rolled back
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7665" target="_top">#7665</a>
          this_thread::sleep_for no longer uses steady_clock in thread
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7720" target="_top">#7720</a>
          exception lock_error while intensive locking/unlocking of mutex
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/9309" target="_top">#9309</a>
          test_latch fails often on clang-darwin-tot11
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/10788" target="_top">#10788</a>
          GetLogicalProcessor isn't available for Windows platform less or equals
          to 0x0502
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/11090" target="_top">#11090</a>
          ex_future_unwrap- ThreadSanitizer: lock-order-inversion (potential deadlock)
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/11158" target="_top">#11158</a>
          Pthread thread deadlock when faketime used
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/11174" target="_top">#11174</a>
          boost::condition_variable::timed_wait with predicate unexpectedly wakes
          up while should wait infinite
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/11185" target="_top">#11185</a>
          Incorrect URL redirection
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/11192" target="_top">#11192</a>
          boost::future&lt;&gt;::then() with an executor doesn't compile when the
          callback returns a future
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/11250" target="_top">#11250</a>
          future made from make_exceptional fails on assertion in destructor
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/11256" target="_top">#11256</a>
          future&lt;&gt;::is_ready() == false in continuation function
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/11261" target="_top">#11261</a>
          bad use of scoped threads in basic_thread_pool
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/11262" target="_top">#11262</a>
          bad use of direct pointer in shared_state_nullary_task
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/11263" target="_top">#11263</a>
          lock already locked lock
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/11266" target="_top">#11266</a>
          boost::packaged_task has invalid variadic signature
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/11302" target="_top">#11302</a>
          boost thread doesn't build with BOOST_THREAD_PATCH.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/11322" target="_top">#11322</a>
          sleep_for() nanoseconds overload will always return too early on windows
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/11329" target="_top">#11329</a>
          using declarative for GetProcessHeap, .... fails
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/11368" target="_top">#11368</a>
          boost thread's usage of CreateWaitableTimer wakes PC from sleep (doh)
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/11377" target="_top">#11377</a>
          Boost condition variable always waits for system clock deadline
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/11435" target="_top">#11435</a>
          gcc compiler warning in future.hpp
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/11555" target="_top">#11555</a>
          devector.hpp assumes allocator_traits_type is always present
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/11562" target="_top">#11562</a>
          (condition_variable_any::wait_until + recursive_mutex + steady_clock) timer
          expires after computer time is set forward on Ubuntu 64-bit
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/11672" target="_top">#11672</a>
          Thread: Should use unique_ptr, not auto_ptr
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/11688" target="_top">#11688</a>
          thread::try_join_until: Avoid busy wait if system clock changes
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/11672" target="_top">#11716</a>
          ::then(f) should inherit the parent Executor
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/11795" target="_top">#11795</a>
          Incorrect version specification for documentation of thread destructor
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/11796" target="_top">#11796</a>
          Thread move assignment operator, does not detach previous thread data
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/11817" target="_top">#11817</a>
          'sync_queue_is_closed' was not declared in boost/thread/executors/thread_executor.hpp
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/11818" target="_top">#11818</a>
          future.then will be blocked if promise is set after the invocation of then
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/12049" target="_top">#12049</a>
          Assertion failure from detached threads during shutdown
        </li>
</ul></div>
<h4>
<a name="thread.changes.h2"></a>
      <span><a name="thread.changes.version_4_5_0___boost_1_58"></a></span><a class="link" href="changes.html#thread.changes.version_4_5_0___boost_1_58">Version
      4.5.0 - boost 1.58</a>
    </h4>
<p>
      <span class="bold"><strong>Know Bugs:</strong></span>
    </p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/3926" target="_top">#3926</a>
          thread_specific_ptr + dlopen library causes a SIGSEGV.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/4833" target="_top">#4833</a>
          MinGW/test_tss_lib: Support of automatic tss cleanup for native threading
          API not available
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/8600" target="_top">#8600</a>
          wait_for_any hangs, if called with multiple copies of shared_future referencing
          same task
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/9118" target="_top">#9118</a>
          Seg fault on thread join when llvm and libc++ are used
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/9309" target="_top">#9309</a>
          test_latch fails often on clang-darwin-tot11
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/9311" target="_top">#9311</a>
          ex_lambda_future fails on msvc-11.0
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/10942" target="_top">#10942</a>
          Boost.Thread fails to build on Cygwin.
        </li>
</ul></div>
<p>
      Please take a look at <a href="https://svn.boost.org/trac/boost/query?status=assigned&amp;status=new&amp;status=reopened&amp;component=thread&amp;type=!Feature+Requests&amp;col=id&amp;col=summary&amp;order=id" target="_top">thread
      Know Bugs</a> to see the current state.
    </p>
<p>
      Please take a look at <a href="http://www.boost.org/development/tests/master/developer/thread.html" target="_top">thread
      trunk regression test</a> to see the last regression test snapshot.
    </p>
<p>
      <span class="bold"><strong>Sever limitations:</strong></span>
    </p>
<p>
      There are some severe bugs that prevent the use of the library on concrete
      contexts, in particular:
    </p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem">
          on thread specific storage that prevent the library to be used with dynamic
          libraries ( <a href="http://svn.boost.org/trac/boost/ticket/3926" target="_top">#3926</a>,
          ),
        </li></ul></div>
<p>
      <span class="bold"><strong>New Experimental Features:</strong></span>
    </p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/9600" target="_top">#9600</a>
          Async: Add task_region
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/10611" target="_top">#10611</a>
          Add emplace promise::set_value and emplace make_ready_future
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/10826" target="_top">#10826</a>
          Add scheduled executor operations
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/11048" target="_top">#11048</a>
          Add a serial_executor based on continuations
        </li>
</ul></div>
<p>
      <span class="bold"><strong>Fixed Bugs:</strong></span>
    </p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/6787" target="_top">#6787</a>
          boost::thread::sleep() hangs if system time is rolled back
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/10734" target="_top">#10734</a>
          Submit method work differently on different executors, some throw exception
          and some silently ignore error (thread_executor and inline_executor)
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/10736" target="_top">#10736</a>
          Task exceptions silently ignored. I think std::terminate solution from
          N3785 and std::thread is better choice and more consistent.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/10737" target="_top">#10737</a>
          In serial_executor we have infinite wait if task throw exception.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/10822" target="_top">#10822</a>
          Boost.Thread fails to compile on Android
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/10824" target="_top">#10824</a>
          Boost.Thread 1.57 breaks Windows XP compatibility for SP2 and below.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/10963" target="_top">#10963</a>
          future&lt;future&lt;T&gt;&gt;::then Has No Implementation
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/10964" target="_top">#10964</a>
          future&lt;future&lt;T&gt;&gt;::unwrap().then() Deadlocks
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/10968" target="_top">#10968</a>
          The futures returned by async() and future::then() are not blocking.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/10971" target="_top">#10971</a>
          shared_future::get()/get_or() must be const
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/10972" target="_top">#10972</a>
          shared_future::then() can be called multiple times.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/10979" target="_top">#10979</a>
          Support T&amp; type deduction when the make_ready_future parameter is reference_wrapper&lt;T&gt;
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/10996" target="_top">#10996</a>
          Thread physical_concurrency() is failing on Windows
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/11035" target="_top">#11035</a>
          BOOST_HAS_PTHREAD_MUTEXATTR_SETTYPE not defined for Android
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/11053" target="_top">#11053</a>
          The attached code results in a R6025 - pure virtual function call in run_thread_exit_callbacks
        </li>
</ul></div>
<h4>
<a name="thread.changes.h3"></a>
      <span><a name="thread.changes.version_4_4_0___boost_1_57"></a></span><a class="link" href="changes.html#thread.changes.version_4_4_0___boost_1_57">Version
      4.4.0 - boost 1.57</a>
    </h4>
<p>
      <span class="bold"><strong>Know Bugs:</strong></span>
    </p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/2442" target="_top">#2442</a>
          Application statically linked with Boost.Thread crashes when Google Desktop
          is installed (Windows XP)
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/3926" target="_top">#3926</a>
          thread_specific_ptr + dlopen library causes a SIGSEGV.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/4833" target="_top">#4833</a>
          MinGW/test_tss_lib: Support of automatic tss cleanup for native threading
          API not available
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7319" target="_top">#7319</a>
          Take care of c++std-lib-32966 issue
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/8600" target="_top">#8600</a>
          wait_for_any hangs, if called with multiple copies of shared_future referencing
          same task
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/9118" target="_top">#9118</a>
          Seg fault on thread join when llvm and libc++ are used
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/9309" target="_top">#9309</a>
          test_latch fails often on clang-darwin-tot11
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/9310" target="_top">#9310</a>
          test_4648_lib fails on clang-darwin-asan11
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/9311" target="_top">#9311</a>
          ex_lambda_future fails on msvc-11.0
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/10537" target="_top">#10537</a>
          Application crash on throw exception
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/10651" target="_top">#10651</a>
          boost::thread leaks memory when using the MinGW compiler
        </li>
</ul></div>
<p>
      Please take a look at <a href="https://svn.boost.org/trac/boost/query?status=assigned&amp;status=new&amp;status=reopened&amp;component=thread&amp;type=!Feature+Requests&amp;col=id&amp;col=summary&amp;order=id" target="_top">thread
      Know Bugs</a> to see the current state.
    </p>
<p>
      Please take a look at <a href="http://www.boost.org/development/tests/master/developer/thread.html" target="_top">thread
      trunk regression test</a> to see the last snapshot.
    </p>
<p>
      <span class="bold"><strong>Sever limitations:</strong></span>
    </p>
<p>
      There are some severe bugs that prevent the use of the library on concrete
      contexts, in particular:
    </p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem">
          on thread specific storage that prevent the library to be used with dynamic
          libraries,
        </li></ul></div>
<p>
      <span class="bold"><strong>New Experimental Features:</strong></span>
    </p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/6227" target="_top">#6227</a>
          Synchro: Use of variadic templates on Generic Locking Algorithms on compilers
          providing them
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/10298" target="_top">#10298</a>
          Synchro: Added queue views.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/10300" target="_top">#10300</a>
          Async: Added generic_executor_ref.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/10552" target="_top">#10552</a>
          Add make_valid_future
        </li>
</ul></div>
<p>
      <span class="bold"><strong>Fixed Bugs:</strong></span>
    </p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/6782" target="_top">#6782</a>
          call_once uses incorrect barrier intrinsic on Visual Studio
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/6787" target="_top">#6787</a>
          boost::thread::sleep() hangs if system time is rolled back
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7665" target="_top">#7665</a>
          this_thread::sleep_for no longer uses steady_clock in thread
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/9307" target="_top">#9307</a>
          future::fallback_to assert with ERRORRRRR boost: mutex lock failed in pthread_mutex_lock:
          Invalid argument
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/9308" target="_top">#9308</a>
          future::async fails with terminate called throwing an exception when called
          with a lambda - clang-darwin-asan11
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/9310" target="_top">#9310</a>
          test_4648_lib fails on clang-darwin-asan11
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/9425" target="_top">#9425</a>
          Boost promise &amp; future does not use supplied allocator for value storage
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/9558" target="_top">#9558</a>
          future continuations unit test hangs in get()/pthread_cond_wait() on Mac
          10.7/32-bit/x86/darwin-4.2.1
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/9787" target="_top">#9787</a>
          [windows] Small duration value passed down to basic_timed_mutex::try_lock_until
          and condition_variable::wait_until can cause infinite or near infinite
          wait for win32
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/9880" target="_top">#9880</a>
          [windows] boost::condition_variable.timed_wait() exception if system time
          &lt; 1970
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/10159" target="_top">#10159</a>
          GCC 4.4 error sorry, unimplemented
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/10196" target="_top">#10196</a>
          thread_specific_ptr does not support void*
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/10296" target="_top">#10296</a>
          Boost.Thread 1.56 rc1 does not compile on Mingw
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/10297" target="_top">#10297</a>
          Boost.Thread 1.56 rc1 hangs when built with clang on armhf
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/10340" target="_top">#10340</a>
          No boost::promise&lt;T&gt;::set_value(const T&amp;) overload present in
          C++03 mode
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/10425" target="_top">#10425</a>
          Missing documentation for when_all/when_any.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/10426" target="_top">#10426</a>
          Take in account the deferred futures in when_all.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/10427" target="_top">#10427</a>
          Take in account the deferred and ready futures in when_any.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/10428" target="_top">#10428</a>
          Adapt to new unique_ptr interface in Boost.Move
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/10465" target="_top">#10465</a>
          Missing implementation of when_all/when_any when the result is a tuple.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/10476" target="_top">#10476</a>
          classes using BOOST_THREAD_MOVABLE_ONLY&lt;T&gt; dont satisfy is_copy_constructible&lt;T&gt;::value
          == false
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/10478" target="_top">#10478</a>
          Data race in boost/thread/future.hpp
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/10529" target="_top">#10529</a>
          The pthread/condition_variable_any constructor reports incorrect error
          code for pthread_cond_init
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/10563" target="_top">#10563</a>
          shared_future&lt;R&gt;::then should be const
        </li>
</ul></div>
<h4>
<a name="thread.changes.h4"></a>
      <span><a name="thread.changes.version_4_3_0___boost_1_56"></a></span><a class="link" href="changes.html#thread.changes.version_4_3_0___boost_1_56">Version
      4.3.0 - boost 1.56</a>
    </h4>
<p>
      <span class="bold"><strong>Know Bugs:</strong></span>
    </p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/2442" target="_top">#2442</a>
          Application statically linked with Boost.Thread crashes when Google Desktop
          is installed (Windows XP)
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/3926" target="_top">#3926</a>
          thread_specific_ptr + dlopen library causes a SIGSEGV.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/4833" target="_top">#4833</a>
          MinGW/test_tss_lib: Support of automatic tss cleanup for native threading
          API not available
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/6782" target="_top">#6782</a>
          call_once uses incorrect barrier intrinsic on Visual Studio
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7319" target="_top">#7319</a>
          Take care of c++std-lib-32966 issue
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/8600" target="_top">#8600</a>
          wait_for_any hangs, if called with multiple copies of shared_future referencing
          same task
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/9307" target="_top">#9307</a>
          future::fallback_to assert with ERRORRRRR boost: mutex lock failed in pthread_mutex_lock:
          Invalid argument
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/9308" target="_top">#9308</a>
          future::async fails with terminate called throwing an exception when called
          with a lambda - clang-darwin-asan11
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/9310" target="_top">#9310</a>
          test_4648_lib fails on clang-darwin-asan11
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/9311" target="_top">#9311</a>
          ex_lambda_future fails on msvc-11.0
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/9425" target="_top">#9425</a>
          Boost promise &amp; future does not use supplied allocator for value storage
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/9558" target="_top">#9558</a>
          future continuations unit test hangs in get()/pthread_cond_wait() on Mac
          10.7/32-bit/x86/darwin-4.2.1
        </li>
</ul></div>
<p>
      Please take a look at <a href="https://svn.boost.org/trac/boost/query?status=assigned&amp;status=new&amp;status=reopened&amp;component=thread&amp;type=!Feature+Requests&amp;col=id&amp;col=summary&amp;order=id" target="_top">thread
      Know Bugs</a> to see the current state.
    </p>
<p>
      Please take a look at <a href="http://www.boost.org/development/tests/master/developer/thread.html" target="_top">thread
      trunk regression test</a> to see the last snapshot.
    </p>
<p>
      <span class="bold"><strong>Sever limitations:</strong></span>
    </p>
<p>
      There are some severe bugs that prevent the use of the library on concrete
      contexts, in particular:
    </p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
          on thread specific storage that prevent the library to be used with dynamic
          libraries,
        </li>
<li class="listitem">
          The experimental features of boost::future have some severe holes that
          make the program crash unexpectedly.
        </li>
</ul></div>
<p>
      <span class="bold"><strong>New Experimental Features:</strong></span>
    </p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7446" target="_top">#7446</a>
          Async: Add when_any.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7447" target="_top">#7447</a>
          Async: Add when_all.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7448" target="_top">#7448</a>
          Async: Add async taking a scheduler parameter.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/8274" target="_top">#8274</a>
          Synchro: Add concurrent queue
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/8518" target="_top">#8518</a>
          Synchro: Add a latch class.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/8513" target="_top">#8513</a>
          Async: Add a basic thread_pool executor.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/8516" target="_top">#8516</a>
          Async: Add future/shared_future::then taking a scheduler as parameter.
        </li>
</ul></div>
<p>
      <span class="bold"><strong>Fixed Bugs:</strong></span>
    </p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/8070" target="_top">#8070</a>
          prefer GetTickCount64 over GetTickCount
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/9333" target="_top">#9333</a>
          ex_scoped_thread compile fails on msvc-12.0
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/9366" target="_top">#9366</a>
          async(Executor, ...) fails to compile with msvc-10,11,12
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/9402" target="_top">#9402</a>
          test_excutor regression on msvc-10,11,12
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/9404" target="_top">#9404</a>
          ex_make_future regression error
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/9471" target="_top">#9471</a>
          Synchronization documentation nits
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/9535" target="_top">#9535</a>
          Missing exception safety might result in crash
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/9618" target="_top">#9618</a>
          try_join_for problem: program is not terminate.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/9673" target="_top">#9673</a>
          thread compilation with MingW/gcc on Windows gives errors
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/9708" target="_top">#9708</a>
          boost::condition_variable::timed_wait unexpectedly wakes up while should
          wait infinite
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/9711" target="_top">#9711</a>
          future continuation called twice
        </li>
</ul></div>
<h4>
<a name="thread.changes.h5"></a>
      <span><a name="thread.changes.version_4_2_0___boost_1_55"></a></span><a class="link" href="changes.html#thread.changes.version_4_2_0___boost_1_55">Version
      4.2.0 - boost 1.55</a>
    </h4>
<p>
      <span class="bold"><strong>Know Bugs:</strong></span>
    </p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/2442" target="_top">#2442</a>
          Application statically linked with Boost.Thread crashes when Google Desktop
          is installed (Windows XP)
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/3926" target="_top">#3926</a>
          thread_specific_ptr + dlopen library causes a SIGSEGV.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/4833" target="_top">#4833</a>
          MinGW/test_tss_lib: Support of automatic tss cleanup for native threading
          API not available
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/6782" target="_top">#6782</a>
          call_once uses incorrect barrier intrinsic on Visual Studio
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7319" target="_top">#7319</a>
          Take care of c++std-lib-32966 issue
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/8600" target="_top">#8600</a>
          wait_for_any hangs, if called with multiple copies of shared_future referencing
          same task
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/9307" target="_top">#9307</a>
          future::fallback_to assert with ERRORRRRR boost: mutex lock failed in pthread_mutex_lock:
          Invalid argument
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/9308" target="_top">#9308</a>
          future::async fails with terminate called throwing an exception when called
          with a lambda - clang-darwin-asan11
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/9311" target="_top">#9311</a>
          ex_lambda_future fails on msvc-11.0
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/9310" target="_top">#9310</a>
          test_4648_lib fails on clang-darwin-asan11
        </li>
</ul></div>
<p>
      Please take a look at <a href="https://svn.boost.org/trac/boost/query?status=assigned&amp;status=new&amp;status=reopened&amp;component=thread&amp;type=!Feature+Requests&amp;col=id&amp;col=summary&amp;order=id" target="_top">thread
      trunk regression test</a> to see the current state.
    </p>
<p>
      <span class="bold"><strong>Sever limitations:</strong></span>
    </p>
<p>
      There are some severe bugs that prevent the use of the library on concrete
      contexts, in particular:
    </p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
          on thread specific storage that prevent the library to be used with dynamic
          libraries,
        </li>
<li class="listitem">
          The experimental features of boost::future have some severe holes that
          make the program crash unexpectedly.
        </li>
</ul></div>
<p>
      <span class="bold"><strong>New Features:</strong></span>
    </p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/8519" target="_top">#8519</a>
          Synchro: Update class barrier with a completion function.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/8515" target="_top">#8515</a>
          Async: Add shared_future::then.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/8519" target="_top">#8519</a>
          Synchro: Update class barrier with a completion function
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/8615" target="_top">#8615</a>
          Async: Replace make_future/make_shared_future by make_ready_future.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/8627" target="_top">#8627</a>
          Async: Add future&lt;&gt;::unwrap and unwrapping constructor.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/8677" target="_top">#8677</a>
          Async: Add future&lt;&gt;::get_or.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/8678" target="_top">#8678</a>
          Async: Add future&lt;&gt;::fallback_to.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/8891" target="_top">#8891</a>
          upgrade_to_unique_lock: missing mutex() function.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/8955" target="_top">#8955</a>
          Request for more efficient way to get exception_ptr from future.
        </li>
</ul></div>
<p>
      <span class="bold"><strong>Fixed Bugs:</strong></span>
    </p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7461" target="_top">#7461</a>
          detail::win32::ReleaseSemaphore may be called with count_to_release equal
          to 0
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/8070" target="_top">#8070</a>
          prefer GetTickCount64 over GetTickCount
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/8768" target="_top">#8768</a>
          win32 condition_variable::wait_until infinite wait in rare cases.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/8817" target="_top">#8817</a>
          Boost Thread Windows CE _createthreadex handling breaks mingw w64.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/8943" target="_top">#8943</a>
          Failed to compile code using boost::call_once with Intel C++ Composer XE
          2013 on Windows.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/8931" target="_top">#8931</a>
          Typos in external_locking reference.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/9029" target="_top">#9029</a>
          Misprint in documentation.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/9037" target="_top">#9037</a>
          gcc -Wshadow gives warnings in condition_variable{,_fwd}.hpp.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/9041" target="_top">#9041</a>
          Boost.Thread DSO's may need to link with Boost.Atomic.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/9048" target="_top">#9048</a>
          boost::scoped_thread useless ctor with variadic template arguments.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/9079" target="_top">#9079</a>
          Condition variable will wait forever for some timepoint values (Win).
        </li>
</ul></div>
<h4>
<a name="thread.changes.h6"></a>
      <span><a name="thread.changes.version_4_1_0___boost_1_54"></a></span><a class="link" href="changes.html#thread.changes.version_4_1_0___boost_1_54">Version
      4.1.0 - boost 1.54</a>
    </h4>
<p>
      <span class="bold"><strong>New Features:</strong></span>
    </p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7285" target="_top">#7285</a>
          C++11 compliance: Allow to pass movable arguments for call_once.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7445" target="_top">#7445</a>
          Async: Add future&lt;&gt;.then
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7449" target="_top">#7449</a>
          Synchro: Add a synchronized value class
        </li>
</ul></div>
<p>
      <span class="bold"><strong>Fixed Bugs:</strong></span>
    </p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/4878" target="_top">#4878</a>
          MinGW 4.5.0 undefined reference to bool interruptible_wait(detail::win32::handle
          handle_to_wait_for,detail::t imeout target_time).
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/4882" target="_top">#4882</a>
          Win32 shared_mutex does not handle timeouts correctly.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/5752" target="_top">#5752</a>
          boost::call_once() is unreliable on some platforms
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/6652" target="_top">#6652</a>
          Boost.Thread shared_mutex.hpp:50:99: warning: dereferencing type-punned
          pointer will break strict-aliasing rules <span class="strikethrough">Wstrict-aliasing</span>
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/6843" target="_top">#6843</a>
          [Intel C++] Compile Errors with '#include &lt;atomic&gt;'
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/6966" target="_top">#6966</a>
          future boost::future_category inconsistent dll linkage
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7720" target="_top">#7720</a>
          exception lock_error while intensive locking/unlocking of mutex
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7755" target="_top">#7755</a>
          Thread: deadlock with shared_mutex on Windows
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7980" target="_top">#7980</a>
          Build error: msvc-11.0 and BOOST_THREAD_DONT_USE_DATETIME
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7982" target="_top">#7982</a>
          pthread_delay_np() parm compile error on AIX
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/8027" target="_top">#8027</a>
          thread library fails to compile with Visual Studio 2003
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/8070" target="_top">#8070</a>
          prefer GetTickCount64 over GetTickCount
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/8136" target="_top">#8136</a>
          boost::this_thread::sleep_for() sleeps longer than it should in Windows
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/8212" target="_top">#8212</a>
          Boost thread compilation error on Solaris 10
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/8237" target="_top">#8237</a>
          fix documentation for 'thread_group'
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/8239" target="_top">#8239</a>
          barrier::wait() not marked as interruption_point
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/8323" target="_top">#8323</a>
          boost::thread::try_join_for/try_join_until may block indefinitely due to
          a combination of problems in Boost.Thread and Boost.Chrono
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/8337" target="_top">#8337</a>
          The internal representation of "std::string(this-&gt;code()-&gt;message())"
          escapes, but is destroyed when it exits scope.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/8371" target="_top">#8371</a>
          C++11 once_flag enabled when constexpr is not available
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/8422" target="_top">#8422</a>
          Assertion in win32::WaitForSingleObject()
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/8443" target="_top">#8443</a>
          Header file inclusion order may cause crashes
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/8451" target="_top">#8451</a>
          Missing documented function 'boost::scoped_thread::joinable'
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/8458" target="_top">#8458</a>
          -DBOOST_THREAD_DONT_USE_CHRONO in thread.obj.rsp but not explicitly set
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/8530" target="_top">#8530</a>
          [Coverity] Unused variable thread_handle, uninitialized variable cond_mutex
          in thread/pthread/thread_data.hpp
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/8550" target="_top">#8550</a>
          static linking of Boost.Thread with an MFC-Dll
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/8576" target="_top">#8576</a>
          "sur parolle" should be "sur parole".
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/8596" target="_top">#8596</a>
          With C++0x enabled, boost::packaged_task stores a reference to function
          objects, instead of a copy.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/8626" target="_top">#8626</a>
          Reintroduce BOOST_VERIFY on pthread_mutex_destroy return type
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/8645" target="_top">#8645</a>
          Typo in Strict lock definition
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/8671" target="_top">#8671</a>
          promise: set_..._at_thread_exit
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/8672" target="_top">#8672</a>
          future&lt;&gt;::then(void()) doesn't works
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/8674" target="_top">#8674</a>
          Futures as local named objects can't be returned with implicit move.
        </li>
</ul></div>
<h4>
<a name="thread.changes.h7"></a>
      <span><a name="thread.changes.version_4_0_0___boost_1_53"></a></span><a class="link" href="changes.html#thread.changes.version_4_0_0___boost_1_53">Version
      4.0.0 - boost 1.53</a>
    </h4>
<p>
      <span class="bold"><strong>Deprecated features:</strong></span>
    </p>
<div class="warning"><table border="0" summary="Warning">
<tr>
<td rowspan="2" align="center" valign="top" width="25"><img alt="[Warning]" src="../../../doc/src/images/warning.png"></td>
<th align="left">Warning</th>
</tr>
<tr><td align="left" valign="top"><p>
        Deprecated features since boost 1.53 will be available only until boost 1.58.
      </p></td></tr>
</table></div>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
          C++11 compliance: packaged_task&lt;R&gt; is deprecated, use instead packaged_task&lt;R()&gt;.
          See BOOST_THREAD_PROVIDES_SIGNATURE_PACKAGED_TASK and BOOST_THREAD_DONT_PROVIDE_SIGNATURE_PACKAGED_TASK
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7537" target="_top">#7537</a>
          deprecate Mutex::scoped_lock and scoped_try_lock and boost::condition
        </li>
</ul></div>
<p>
      <span class="bold"><strong>New Features:</strong></span>
    </p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/6270" target="_top">#6270</a>
          c++11 compliance: Add thread constructor from movable callable and movable
          arguments Provided when BOOST_THREAD_PROVIDES_VARIADIC_THREAD is defined
          (Default value from Boost 1.55): See BOOST_THREAD_PROVIDES_VARIADIC_THREAD
          and BOOST_THREAD_DONT_PROVIDE_VARIADIC_THREAD.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7279" target="_top">#7279</a>
          C++11 compliance: Add noexcept in system related functions
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7280" target="_top">#7280</a>
          C++11 compliance: Add promise::...at_thread_exit functions
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7281" target="_top">#7281</a>
          C++11 compliance: Add ArgTypes to packaged_task template. Provided when
          BOOST_THREAD_PROVIDES_SIGNATURE_PACKAGED_TASK is defined (Default value
          from Boost 1.55). See BOOST_THREAD_PROVIDES_SIGNATURE_PACKAGED_TASK and
          BOOST_THREAD_DONT_PROVIDE_SIGNATURE_PACKAGED_TASK.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7282" target="_top">#7282</a>
          C++11 compliance: Add packaged_task::make_ready_at_thread_exit function
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7285" target="_top">#7285</a>
          C++11 compliance: Allow to pass movable arguments for call_once
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7412" target="_top">#7412</a>
          C++11 compliance: Add async from movable callable and movable arguments
          Provided when BOOST_THREAD_PROVIDES_VARIADIC_THREAD and BOOST_THREAD_PROVIDES_SIGNATURE_PACKAGED_TASK
          are defined (Default value from Boost 1.55): See BOOST_THREAD_PROVIDES_SIGNATURE_PACKAGED_TASK
          and BOOST_THREAD_DONT_PROVIDE_SIGNATURE_PACKAGED_TASK, BOOST_THREAD_PROVIDES_VARIADIC_THREAD
          and BOOST_THREAD_DONT_PROVIDE_VARIADIC_THREAD.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7413" target="_top">#7413</a>
          C++11 compliance: Add async when the launch policy is deferred.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7414" target="_top">#7414</a>
          C++11 compliance: future::get post-condition should be valid()==false.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7422" target="_top">#7422</a>
          Provide a condition variable with zero-overhead performance penality.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7414" target="_top">#7444</a>
          Async: Add make_future/make_shared_future.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7540" target="_top">#7540</a>
          Threads: Add a helper class that join a thread on destruction.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7541" target="_top">#7541</a>
          Threads: Add a thread wrapper class that joins on destruction.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7575" target="_top">#7575</a>
          C++11 compliance: A future created by async should "join" in
          the destructor.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7587" target="_top">#7587</a>
          Synchro: Add strict_lock and nested_strict_lock.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7588" target="_top">#7588</a>
          Synchro: Split the locks.hpp in several files to limit dependencies.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7590" target="_top">#7590</a>
          Synchro: Add lockable concept checkers based on Boost.ConceptCheck.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7591" target="_top">#7591</a>
          Add lockable traits that can be used with enable_if.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7592" target="_top">#7592</a>
          Synchro: Add a null_mutex that is a no-op and that is a model of UpgardeLockable.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7593" target="_top">#7593</a>
          Synchro: Add a externally_locked class.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7590" target="_top">#7594</a>
          Threads: Allow to disable thread interruptions.
        </li>
</ul></div>
<p>
      <span class="bold"><strong>Fixed Bugs:</strong></span>
    </p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/5752" target="_top">#5752</a>
          boost::call_once() is unreliable on some platforms
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7464" target="_top">#7464</a>
          BOOST_TEST(n_alive == 1); fails due to race condition in a regression test
          tool.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7657" target="_top">#7657</a>
          Serious performance and memory consumption hit if condition_variable methods
          condition notify_one or notify_all is used repeatedly.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7665" target="_top">#7665</a>
          this_thread::sleep_for no longer uses steady_clock in thread.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7668" target="_top">#7668</a>
          thread_group::join_all() should check whether its threads are joinable.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7669" target="_top">#7669</a>
          thread_group::join_all() should catch resource_deadlock_would_occur.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7671" target="_top">#7671</a>
          Error including boost/thread.hpp header on iOS.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7672" target="_top">#7672</a>
          lockable_traits.hpp syntax error: "defined" token misspelled.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7798" target="_top">#7798</a>
          boost::future set_wait_callback thread safety issues.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7808" target="_top">#7808</a>
          Incorrect description of effects for this_thread::sleep_for and this_thread::sleep_until.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7812" target="_top">#7812</a>
          Returns: cv_status::no_timeout if the call is returning because the time
          period specified by rel_time has elapsed, cv_status::timeout otherwise.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7874" target="_top">#7874</a>
          compile warning: thread.hpp:342: warning: type attributes are honored only
          at type definition.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7875" target="_top">#7875</a>
          BOOST_THREAD_THROW_IF_PRECONDITION_NOT_SATISFIED should not be enabled
          by default.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7882" target="_top">#7882</a>
          wrong exception text from condition_variable::wait(unique_lock&lt;mutex&gt;&amp;).
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7890" target="_top">#7890</a>
          thread::do_try_join_until() is missing a return type.
        </li>
</ul></div>
<h4>
<a name="thread.changes.h8"></a>
      <span><a name="thread.changes.version_3_1_0___boost_1_52"></a></span><a class="link" href="changes.html#thread.changes.version_3_1_0___boost_1_52">Version
      3.1.0 - boost 1.52</a>
    </h4>
<p>
      Deprecated Features:
    </p>
<p>
      Deprecated features since boost 1.50 available only until boost 1.55:
    </p>
<p>
      These deprecated features will be provided by default up to boost 1.52. If
      you don't want to include the deprecated features you could define BOOST_THREAD_DONT_PROVIDE_DEPRECATED_FEATURES_SINCE_V3_0_0.
      Since 1.53 these features will not be included any more by default. Since this
      version, if you want to include the deprecated features yet you could define
      BOOST_THREAD_PROVIDE_DEPRECATED_FEATURES_SINCE_V3_0_0. These deprecated features
      will be only available until boost 1.55, that is you have yet 1 year to move
      to the new features.
    </p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem">
          Time related functions don't using the Boost.Chrono library, use the chrono
          overloads instead.
        </li></ul></div>
<p>
      Breaking changes when BOOST_THREAD_VERSION==3 (Default value since Boost 1.53):
    </p>
<p>
      There are some new features which share the same interface but with different
      behavior. These breaking features are provided by default when BOOST_THREAD_VERSION
      is 3, but the user can however choose the version 2 behavior by defining the
      corresponding macro. As for the deprecated features, these broken features
      will be only available until boost 1.55.
    </p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/6229" target="_top">#6229</a>
          Rename the unique_future to future following the c++11.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/6266" target="_top">#6266</a>
          Breaking change: thread destructor should call terminate if joinable.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/6269" target="_top">#6269</a>
          Breaking change: thread move assignment should call terminate if joinable.
        </li>
</ul></div>
<p>
      New Features:
    </p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/2361" target="_top">#2361</a>
          thread_specific_ptr: document nature of the key, complexity and rationale.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/4710" target="_top">#4710</a>
          C++11 compliance: Missing async().
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7283" target="_top">#7283</a>
          C++11 compliance: Add notify_all_at_thread_exit.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7345" target="_top">#7345</a>
          C++11 compliance: Add noexcept to recursive mutex try_lock.
        </li>
</ul></div>
<p>
      Fixed Bugs:
    </p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/2797" target="_top">#2797</a>
          Two problems with thread_specific_ptr.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/5274" target="_top">#5274</a>
          failed to compile future.hpp with stlport 5.1.5 under msvc8.1, because
          of undefined class.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/5431" target="_top">#5431</a>
          compile error in Windows CE 6.0(interlocked).
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/5696" target="_top">#5696</a>
          win32 detail::set_tss_data does nothing when tss_cleanup_function is NULL.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/6931" target="_top">#6931</a>
          mutex waits forwever with Intel C++ Compiler XE 12.1.5.344 Build 20120612
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7045" target="_top">#7045</a>
          Thread library does not automatically compile date_time.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7173" target="_top">#7173</a>
          wrong function name interrupt_point().
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7200" target="_top">#7200</a>
          Unable to build boost.thread modularized.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7220" target="_top">#7220</a>
          gcc 4.6.2 warns about inline+dllimport functions.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7238" target="_top">#7238</a>
          this_thread::sleep_for() does not respond to interrupt().
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7245" target="_top">#7245</a>
          Minor typos on documentation related to version 3.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7272" target="_top">#7272</a>
          win32/thread_primitives.hpp: (Unneccessary) Warning.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7284" target="_top">#7284</a>
          Clarify that there is no access priority between lock and shared_lock on
          shared mutex.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7329" target="_top">#7329</a>
          boost/thread/future.hpp does not compile on HPUX.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7336" target="_top">#7336</a>
          BOOST_THREAD_DONT_USE_SYSTEM doesn't work.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7329" target="_top">#7349</a>
          packaged_task holds reference to temporary.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7350" target="_top">#7350</a>
          allocator_destructor does not destroy object
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7360" target="_top">#7360</a>
          Memory leak in pthread implementation of boost::thread_specific_ptr
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7370" target="_top">#7370</a>
          Boost.Thread documentation
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7438" target="_top">#7438</a>
          Segmentation fault in test_once regression test in group.join_all();
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7461" target="_top">#7461</a>
          detail::win32::ReleaseSemaphore may be called with count_to_release equal
          to 0
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7499" target="_top">#7499</a>
          call_once doesn't call even once
        </li>
</ul></div>
<h4>
<a name="thread.changes.h9"></a>
      <span><a name="thread.changes.version_3_0_1___boost_1_51"></a></span><a class="link" href="changes.html#thread.changes.version_3_0_1___boost_1_51">Version
      3.0.1 - boost 1.51</a>
    </h4>
<p>
      Deprecated Features:
    </p>
<p>
      Deprecated features since boost 1.50 available only until boost 1.55:
    </p>
<p>
      These deprecated features will be provided by default up to boost 1.52. If
      you don't want to include the deprecated features you could define BOOST_THREAD_DONT_PROVIDE_DEPRECATED_FEATURES_SINCE_V3_0_0.
      Since 1.53 these features will not be included any more by default. Since this
      version, if you want to include the deprecated features yet you could define
      BOOST_THREAD_PROVIDE_DEPRECATED_FEATURES_SINCE_V3_0_0. These deprecated features
      will be only available until boost 1.55, that is you have 1 year and a half
      to move to the new features.
    </p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem">
          Time related functions don't using the Boost.Chrono library, use the chrono
          overloads instead.
        </li></ul></div>
<p>
      Breaking changes when BOOST_THREAD_VERSION==3:
    </p>
<p>
      There are some new features which share the same interface but with different
      behavior. These breaking features are provided by default when BOOST_THREAD_VERSION
      is 3, but the user can however choose the version 2 behavior by defining the
      corresponding macro. As for the deprecated features, these broken features
      will be only available until boost 1.55.
    </p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/6229" target="_top">#6229</a>
          Rename the unique_future to future following the c++11.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/6266" target="_top">#6266</a>
          Breaking change: thread destructor should call terminate if joinable.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/6269" target="_top">#6269</a>
          Breaking change: thread move assignment should call terminate if joinable.
        </li>
</ul></div>
<p>
      Fixed Bugs:
    </p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/4258" target="_top">#4258</a>
          Linking with boost thread does not work on mingw/gcc 4.5.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/4885" target="_top">#4885</a>
          Access violation in set_tss_data at process exit due to invalid assumption
          about TlsAlloc.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/6931" target="_top">#6931</a>
          mutex waits forwever with Intel Compiler and /debug:parallel
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7044" target="_top">#7044</a>
          boost 1.50.0 header missing.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7052" target="_top">#7052</a>
          Thread: BOOST_THREAD_PROVIDES_DEPRECATED_FEATURES_SINCE_V3_0_0 only masks
          thread::operator==, thread::operator!= forward declarations, not definitions.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7066" target="_top">#7066</a>
          An attempt to fix current_thread_tls_key static initialization order.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7074" target="_top">#7074</a>
          Multiply defined symbol boost::allocator_arg.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7078" target="_top">#7078</a>
          Trivial 64-bit warning fix on Windows for thread attribute stack size
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/7089" target="_top">#7089</a>
          BOOST_THREAD_WAIT_BUG limits functionality without solving anything
        </li>
</ul></div>
<h4>
<a name="thread.changes.h10"></a>
      <span><a name="thread.changes.version_3_0_0___boost_1_50"></a></span><a class="link" href="changes.html#thread.changes.version_3_0_0___boost_1_50">Version
      3.0.0 - boost 1.50</a>
    </h4>
<p>
      Breaking changes when BOOST_THREAD_VERSION==3:
    </p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/6229" target="_top">#6229</a>
          Breaking change: Rename the unique_future to future following the c++11.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/6266" target="_top">#6266</a>
          Breaking change: thread destructor should call terminate if joinable.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/6269" target="_top">#6269</a>
          Breaking change: thread move assignment should call terminate if joinable.
        </li>
</ul></div>
<p>
      New Features:
    </p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/1850" target="_top">#1850</a>
          Request for unlock_guard to compliment lock_guard.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/2637" target="_top">#2637</a>
          Request for shared_mutex duration timed_lock and timed_lock_shared.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/2741" target="_top">#2741</a>
          Proposal to manage portable and non portable thread attributes.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/3567" target="_top">#3567</a>
          Request for shared_lock_guard.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/6194" target="_top">#6194</a>
          Adapt to Boost.Move.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/6195" target="_top">#6195</a>
          c++11 compliance: Provide the standard time related interface using Boost.Chrono.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/6217" target="_top">#6217</a>
          Enhance Boost.Thread shared mutex interface following Howard Hinnant proposal.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/6224" target="_top">#6224</a>
          c++11 compliance: Add the use of standard noexcept on compilers supporting
          them.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/6225" target="_top">#6225</a>
          Add the use of standard =delete defaulted operations on compilers supporting
          them.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/6226" target="_top">#6226</a>
          c++11 compliance: Add explicit bool conversion from locks.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/6228" target="_top">#6228</a>
          Add promise constructor with allocator following the standard c++11.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/6230" target="_top">#6230</a>
          c++11 compliance: Follows the exception reporting mechanism as defined
          in the c++11.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/6231" target="_top">#6231</a>
          Add BasicLockable requirements in the documentation to follow c++11.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/6272" target="_top">#6272</a>
          c++11 compliance: Add thread::id hash specialization.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/6273" target="_top">#6273</a>
          c++11 compliance: Add cv_status enum class and use it on the conditions
          wait functions.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/6342" target="_top">#6342</a>
          c++11 compliance: Adapt the one_flag to the c++11 interface.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/6671" target="_top">#6671</a>
          upgrade_lock: missing mutex and release functions.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/6672" target="_top">#6672</a>
          upgrade_lock:: missing constructors from time related types.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/6675" target="_top">#6675</a>
          upgrade_lock:: missing non-member swap.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/6676" target="_top">#6676</a>
          lock conversion should be explicit.
        </li>
<li class="listitem">
          Added missing packaged_task::result_type and packaged_task:: constructor
          with allocator.
        </li>
<li class="listitem">
          Added packaged_task::reset()
        </li>
</ul></div>
<p>
      Fixed Bugs:
    </p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/2380" target="_top">#2380</a>
          boost::move from lvalue does not work with gcc.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/2430" target="_top">#2430</a>
          shared_mutex for win32 doesn't have timed_lock_upgrade.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/2575" target="_top">#2575</a>
          Bug- Boost 1.36.0 on Itanium platform.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/3160" target="_top">#3160</a>
          Duplicate tutorial code in boost::thread.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/4345" target="_top">#4345</a>
          thread::id and joining problem with cascade of threads.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/4521" target="_top">#4521</a>
          Error using boost::move on packaged_task (MSVC 10).
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/4711" target="_top">#4711</a>
          Must use implementation details to return move-only types.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/4921" target="_top">#4921</a>
          BOOST_THREAD_USE_DLL and BOOST_THREAD_USE_LIB are crucial and need to be
          documented.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/5013" target="_top">#5013</a>
          documentation: boost::thread: pthreas_exit causes terminate().
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/5173" target="_top">#5173</a>
          boost::this_thread::get_id is very slow.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/5351" target="_top">#5351</a>
          interrupt a future get boost::unknown_exception.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/5516" target="_top">#5516</a>
          Upgrade lock is not acquired when previous upgrade lock releases if another
          read lock is present.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/5990" target="_top">#5990</a>
          shared_future&lt;T&gt;::get() has wrong return type.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/6174" target="_top">#6174</a>
          packaged_task doesn't correctly handle moving results.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/6222" target="_top">#6222</a>
          Compile error with SunStudio: unique_future move.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/6354" target="_top">#6354</a>
          PGI: Compiler threading support is not turned on.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/6673" target="_top">#6673</a>
          shared_lock: move assign doesn't works with c++11.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/6674" target="_top">#6674</a>
          shared_mutex: try_lock_upgrade_until doesn't works.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/6908" target="_top">#6908</a>
          Compile error due to unprotected definitions of _WIN32_WINNT and WINVER.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/6940" target="_top">#6940</a>
          TIME_UTC is a macro in C11.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/6959" target="_top">#6959</a>
          call of abs is ambiguous.
        </li>
<li class="listitem">
          Fix issue signaled on the ML with task_object(task_object const&amp;) in
          presence of task_object(task_object &amp;&amp;)
        </li>
</ul></div>
<h4>
<a name="thread.changes.h11"></a>
      <span><a name="thread.changes.version_2_1_1___boost_1_49"></a></span><a class="link" href="changes.html#thread.changes.version_2_1_1___boost_1_49">Version
      2.1.1 - boost 1.49</a>
    </h4>
<p>
      Fixed Bugs:
    </p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/2309" target="_top">#2309</a>
          Lack of g++ symbol visibility support in Boost.Thread.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/2639" target="_top">#2639</a>
          documentation should be extended(defer_lock, try_to_lock, ...).
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/3639" target="_top">#3639</a>
          Boost.Thread doesn't build with Sun-5.9 on Linux.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/3762" target="_top">#3762</a>
          Thread can't be compiled with winscw (Codewarrior by Nokia).
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/3885" target="_top">#3885</a>
          document about mix usage of boost.thread and native thread api.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/3975" target="_top">#3975</a>
          Incorrect precondition for promise::set_wait_callback().
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/4048" target="_top">#4048</a>
          thread::id formatting involves locale
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/4315" target="_top">#4315</a>
          gcc 4.4 Warning: inline ... declared as dllimport: attribute ignored.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/4480" target="_top">#4480</a>
          OpenVMS patches for compiler issues workarounds.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/4819" target="_top">#4819</a>
          boost.thread's documentation misprints.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/5423" target="_top">#5423</a>
          thread issues with C++0x.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/5617" target="_top">#5617</a>
          boost::thread::id copy ctor.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/5739" target="_top">#5739</a>
          set-but-not-used warnings with gcc-4.6.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/5826" target="_top">#5826</a>
          threads.cpp: resource leak on threads creation failure.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/5839" target="_top">#5839</a>
          thread.cpp: ThreadProxy leaks on exceptions.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/5859" target="_top">#5859</a>
          win32 shared_mutex constructor leaks on exceptions.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/6100" target="_top">#6100</a>
          Compute hardware_concurrency() using get_nprocs() on GLIBC systems.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/6168" target="_top">#6168</a>
          recursive_mutex is using wrong config symbol (possible typo).
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/6175" target="_top">#6175</a>
          Compile error with SunStudio.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/6200" target="_top">#6200</a>
          patch to have condition_variable and mutex error better handle EINTR.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/6207" target="_top">#6207</a>
          shared_lock swap compiler error on clang 3.0 c++11.
        </li>
<li class="listitem">
          <a href="http://svn.boost.org/trac/boost/ticket/6208" target="_top">#6208</a>
          try_lock_wrapper swap compiler error on clang 3.0 c++11.
        </li>
</ul></div>
<h4>
<a name="thread.changes.h12"></a>
      <span><a name="thread.changes.version_2_1_0___changes_since_boost_1_40"></a></span><a class="link" href="changes.html#thread.changes.version_2_1_0___changes_since_boost_1_40">Version 2.1.0
      - Changes since boost 1.40</a>
    </h4>
<p>
      The 1.41.0 release of Boost adds futures to the thread library. There are also
      a few minor changes.
    </p>
<h4>
<a name="thread.changes.h13"></a>
      <span><a name="thread.changes.changes_since_boost_1_35"></a></span><a class="link" href="changes.html#thread.changes.changes_since_boost_1_35">Changes
      since boost 1.35</a>
    </h4>
<p>
      The 1.36.0 release of Boost includes a few new features in the thread library:
    </p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
          New generic <a class="link" href="synchronization.html#thread.synchronization.lock_functions.lock_multiple" title="Non-member function lock(Lockable1,Lockable2,...)"><code class="computeroutput"><span class="identifier">lock</span><span class="special">()</span></code></a>
          and <a class="link" href="synchronization.html#thread.synchronization.lock_functions.try_lock_multiple" title="Non-member function try_lock(Lockable1,Lockable2,...)"><code class="computeroutput"><span class="identifier">try_lock</span><span class="special">()</span></code></a>
          functions for locking multiple mutexes at once.
        </li>
<li class="listitem">
          Rvalue reference support for move semantics where the compilers supports
          it.
        </li>
<li class="listitem">
          A few bugs fixed and missing functions added (including the serious win32
          condition variable bug).
        </li>
<li class="listitem">
          <code class="computeroutput"><span class="identifier">scoped_try_lock</span></code> types are
          now backwards-compatible with Boost 1.34.0 and previous releases.
        </li>
<li class="listitem">
          Support for passing function arguments to the thread function by supplying
          additional arguments to the <a class="link" href="thread_management.html#thread.thread_management.thread" title="Class thread"><code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">thread</span></code></a> constructor.
        </li>
<li class="listitem">
          Backwards-compatibility overloads added for <code class="computeroutput"><span class="identifier">timed_lock</span></code>
          and <code class="computeroutput"><span class="identifier">timed_wait</span></code> functions
          to allow use of <code class="computeroutput"><span class="identifier">xtime</span></code> for
          timeouts.
        </li>
</ul></div>
<h4>
<a name="thread.changes.h14"></a>
      <span><a name="thread.changes.version_2_0_0___changes_since_boost_1_34"></a></span><a class="link" href="changes.html#thread.changes.version_2_0_0___changes_since_boost_1_34">Version 2.0.0
      - Changes since boost 1.34</a>
    </h4>
<p>
      Almost every line of code in <span class="bold"><strong>Boost.Thread</strong></span>
      has been changed since the 1.34 release of boost. However, most of the interface
      changes have been extensions, so the new code is largely backwards-compatible
      with the old code. The new features and breaking changes are described below.
    </p>
<h4>
<a name="thread.changes.h15"></a>
      <span><a name="thread.changes.new_features"></a></span><a class="link" href="changes.html#thread.changes.new_features">New
      Features</a>
    </h4>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
          Instances of <a class="link" href="thread_management.html#thread.thread_management.thread" title="Class thread"><code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">thread</span></code></a> and of the various lock
          types are now movable.
        </li>
<li class="listitem">
          Threads can be interrupted at <a class="link" href="thread_management.html#interruption_points"><span class="emphasis"><em>interruption
          points</em></span></a>.
        </li>
<li class="listitem">
          Condition variables can now be used with any type that implements the
          <a class="link" href="synchronization.html#thread.synchronization.mutex_concepts.lockable" title="Lockable Concept"><code class="computeroutput"><span class="identifier">Lockable</span></code> concept</a>, through the
          use of <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">condition_variable_any</span></code> (<code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">condition</span></code> is a <code class="computeroutput"><span class="keyword">typedef</span></code>
          to <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">condition_variable_any</span></code>, provided for
          backwards compatibility). <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">condition_variable</span></code>
          is provided as an optimization, and will only work with <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">unique_lock</span><span class="special">&lt;</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">mutex</span><span class="special">&gt;</span></code> (<code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">mutex</span><span class="special">::</span><span class="identifier">scoped_lock</span></code>).
        </li>
<li class="listitem">
          Thread IDs are separated from <a class="link" href="thread_management.html#thread.thread_management.thread" title="Class thread"><code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">thread</span></code></a>, so a thread can obtain
          it's own ID (using <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">this_thread</span><span class="special">::</span><span class="identifier">get_id</span><span class="special">()</span></code>), and IDs can be used as keys in associative
          containers, as they have the full set of comparison operators.
        </li>
<li class="listitem">
          Timeouts are now implemented using the Boost DateTime library, through
          a typedef <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">system_time</span></code> for absolute timeouts, and
          with support for relative timeouts in many cases. <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">xtime</span></code>
          is supported for backwards compatibility only.
        </li>
<li class="listitem">
          Locks are implemented as publicly accessible templates <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">lock_guard</span></code>,
          <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">unique_lock</span></code>, <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">shared_lock</span></code>,
          and <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">upgrade_lock</span></code>, which are templated on
          the type of the mutex. The <a class="link" href="synchronization.html#thread.synchronization.mutex_concepts.lockable" title="Lockable Concept"><code class="computeroutput"><span class="identifier">Lockable</span></code> concept</a> has been extended
          to include publicly available <a class="link" href="synchronization.html#thread.synchronization.mutex_concepts.basic_lockable.lock" title="m.lock();"><code class="computeroutput"><span class="identifier">lock</span><span class="special">()</span></code></a>
          and <a class="link" href="synchronization.html#thread.synchronization.mutex_concepts.basic_lockable.unlock" title="m.unlock();"><code class="computeroutput"><span class="identifier">unlock</span><span class="special">()</span></code></a>
          member functions, which are used by the lock types.
        </li>
</ul></div>
<h4>
<a name="thread.changes.h16"></a>
      <span><a name="thread.changes.breaking_changes"></a></span><a class="link" href="changes.html#thread.changes.breaking_changes">Breaking
      Changes</a>
    </h4>
<p>
      The list below should cover all changes to the public interface which break
      backwards compatibility.
    </p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
          <a class="link" href="synchronization.html#thread.synchronization.mutex_types.try_mutex" title="Typedef try_mutex"><code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">try_mutex</span></code></a> has been removed, and
          the functionality subsumed into <a class="link" href="synchronization.html#thread.synchronization.mutex_types.mutex" title="Class mutex"><code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">mutex</span></code></a>. <a class="link" href="synchronization.html#thread.synchronization.mutex_types.try_mutex" title="Typedef try_mutex"><code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">try_mutex</span></code></a> is left as a <code class="computeroutput"><span class="keyword">typedef</span></code>, but is no longer a separate class.
        </li>
<li class="listitem">
          <a class="link" href="synchronization.html#thread.synchronization.mutex_types.recursive_try_mutex" title="Typedef recursive_try_mutex"><code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">recursive_try_mutex</span></code></a> has been removed,
          and the functionality subsumed into <a class="link" href="synchronization.html#thread.synchronization.mutex_types.recursive_mutex" title="Class recursive_mutex"><code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">recursive_mutex</span></code></a>. <a class="link" href="synchronization.html#thread.synchronization.mutex_types.recursive_try_mutex" title="Typedef recursive_try_mutex"><code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">recursive_try_mutex</span></code></a> is left as
          a <code class="computeroutput"><span class="keyword">typedef</span></code>, but is no longer
          a separate class.
        </li>
<li class="listitem">
          <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">detail</span><span class="special">::</span><span class="identifier">thread</span><span class="special">::</span><span class="identifier">lock_ops</span></code> has been removed. Code that
          relies on the <code class="computeroutput"><span class="identifier">lock_ops</span></code>
          implementation detail will no longer work, as this has been removed, as
          it is no longer necessary now that mutex types now have public <a class="link" href="synchronization.html#thread.synchronization.mutex_concepts.basic_lockable.lock" title="m.lock();"><code class="computeroutput"><span class="identifier">lock</span><span class="special">()</span></code></a>
          and <a class="link" href="synchronization.html#thread.synchronization.mutex_concepts.basic_lockable.unlock" title="m.unlock();"><code class="computeroutput"><span class="identifier">unlock</span><span class="special">()</span></code></a>
          member functions.
        </li>
<li class="listitem">
          <code class="computeroutput"><span class="identifier">scoped_lock</span></code> constructors
          with a second parameter of type <code class="computeroutput"><span class="keyword">bool</span></code>
          are no longer provided. With previous boost releases,
<pre class="programlisting"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">mutex</span><span class="special">::</span><span class="identifier">scoped_lock</span> <span class="identifier">some_lock</span><span class="special">(</span><span class="identifier">some_mutex</span><span class="special">,</span><span class="keyword">false</span><span class="special">);</span></pre>
          could be used to create a lock object that was associated with a mutex,
          but did not lock it on construction. This facility has now been replaced
          with the constructor that takes a <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">defer_lock_type</span></code>
          as the second parameter:
<pre class="programlisting"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">mutex</span><span class="special">::</span><span class="identifier">scoped_lock</span> <span class="identifier">some_lock</span><span class="special">(</span><span class="identifier">some_mutex</span><span class="special">,</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">defer_lock</span><span class="special">);</span></pre>
        </li>
<li class="listitem">
          The <code class="computeroutput"><span class="identifier">locked</span><span class="special">()</span></code>
          member function of the <code class="computeroutput"><span class="identifier">scoped_lock</span></code>
          types has been renamed to <a class="link" href="synchronization.html#thread.synchronization.locks.unique_lock.owns_lock" title="bool owns_lock() const"><code class="computeroutput"><span class="identifier">owns_lock</span><span class="special">()</span></code></a>.
        </li>
<li class="listitem">
          You can no longer obtain a <a class="link" href="thread_management.html#thread.thread_management.thread" title="Class thread"><code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">thread</span></code></a> instance representing the
          current thread: a default-constructed <a class="link" href="thread_management.html#thread.thread_management.thread" title="Class thread"><code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">thread</span></code></a> object is not associated
          with any thread. The only use for such a thread object was to support the
          comparison operators: this functionality has been moved to <a class="link" href="thread_management.html#thread.thread_management.thread.id" title="Class boost::thread::id"><code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">thread</span><span class="special">::</span><span class="identifier">id</span></code></a>.
        </li>
<li class="listitem">
          The broken <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">read_write_mutex</span></code> has been replaced with
          <a class="link" href="synchronization.html#thread.synchronization.mutex_types.shared_mutex" title="Class shared_mutex -- C++14"><code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">shared_mutex</span></code></a>.
        </li>
<li class="listitem">
          <a class="link" href="synchronization.html#thread.synchronization.mutex_types.mutex" title="Class mutex"><code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">mutex</span></code></a> is now never recursive.
          For Boost releases prior to 1.35 <a class="link" href="synchronization.html#thread.synchronization.mutex_types.mutex" title="Class mutex"><code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">mutex</span></code></a> was recursive on Windows
          and not on POSIX platforms.
        </li>
<li class="listitem">
          When using a <a class="link" href="synchronization.html#thread.synchronization.mutex_types.recursive_mutex" title="Class recursive_mutex"><code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">recursive_mutex</span></code></a> with a call to
          <a class="link" href="synchronization.html#thread.synchronization.condvar_ref.condition_variable_any.wait" title="template&lt;typename lock_type&gt; void wait(lock_type&amp; lock)"><code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">condition_variable_any</span><span class="special">::</span><span class="identifier">wait</span><span class="special">()</span></code></a>,
          the mutex is only unlocked one level, and not completely. This prior behaviour
          was not guaranteed and did not feature in the tests.
        </li>
</ul></div>
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright &#169; 2007 -11 Anthony Williams<br>Copyright &#169; 2011 -15 Vicente J. Botet Escriba<p>
        Distributed under the Boost Software License, Version 1.0. (See accompanying
        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
      </p>
</div></td>
</tr></table>
<hr>
<div class="spirit-nav">
<a accesskey="p" href="build.html"><img src="../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../thread.html"><img src="../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../index.html"><img src="../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="future.html"><img src="../../../doc/src/images/next.png" alt="Next"></a>
</div>
</body>
</html>