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
|
# -*- Mode: Python -*-
import unittest
import gobject
import sys
import testhelper
class TestGObjectAPI(unittest.TestCase):
def testGObjectModule(self):
obj = gobject.GObject()
self.assertEquals(obj.__module__,
'gobject._gobject')
class TestReferenceCounting(unittest.TestCase):
def testRegularObject(self):
obj = gobject.GObject()
self.assertEquals(obj.__grefcount__, 1)
obj = gobject.new(gobject.GObject)
self.assertEquals(obj.__grefcount__, 1)
def testFloatingWithSinkFunc(self):
obj = testhelper.FloatingWithSinkFunc()
self.assertEquals(obj.__grefcount__, 1)
obj = gobject.new(testhelper.FloatingWithSinkFunc)
self.assertEquals(obj.__grefcount__, 1)
def testFloatingWithoutSinkFunc(self):
obj = testhelper.FloatingWithoutSinkFunc()
self.assertEquals(obj.__grefcount__, 1)
obj = gobject.new(testhelper.FloatingWithoutSinkFunc)
self.assertEquals(obj.__grefcount__, 1)
def testOwnedByLibrary(self):
# Upon creation, the refcount of the object should be 2:
# - someone already has a reference on the new object.
# - the python wrapper should hold its own reference.
obj = testhelper.OwnedByLibrary()
self.assertEquals(obj.__grefcount__, 2)
# We ask the library to release its reference, so the only
# remaining ref should be our wrapper's. Once the wrapper
# will run out of scope, the object will get finalized.
obj.release()
self.assertEquals(obj.__grefcount__, 1)
def testOwnedByLibraryOutOfScope(self):
obj = testhelper.OwnedByLibrary()
self.assertEquals(obj.__grefcount__, 2)
# We are manually taking the object out of scope. This means
# that our wrapper has been freed, and its reference dropped. We
# cannot check it but the refcount should now be 1 (the ref held
# by the library is still there, we didn't call release()
obj = None
# When we get the object back from the lib, the wrapper is
# re-created, so our refcount will be 2 once again.
obj = testhelper.owned_by_library_get_instance_list()[0]
self.assertEquals(obj.__grefcount__, 2)
obj.release()
self.assertEquals(obj.__grefcount__, 1)
def testOwnedByLibraryUsingGObjectNew(self):
# Upon creation, the refcount of the object should be 2:
# - someone already has a reference on the new object.
# - the python wrapper should hold its own reference.
obj = gobject.new(testhelper.OwnedByLibrary)
self.assertEquals(obj.__grefcount__, 2)
# We ask the library to release its reference, so the only
# remaining ref should be our wrapper's. Once the wrapper
# will run out of scope, the object will get finalized.
obj.release()
self.assertEquals(obj.__grefcount__, 1)
def testOwnedByLibraryOutOfScopeUsingGobjectNew(self):
obj = gobject.new(testhelper.OwnedByLibrary)
self.assertEquals(obj.__grefcount__, 2)
# We are manually taking the object out of scope. This means
# that our wrapper has been freed, and its reference dropped. We
# cannot check it but the refcount should now be 1 (the ref held
# by the library is still there, we didn't call release()
obj = None
# When we get the object back from the lib, the wrapper is
# re-created, so our refcount will be 2 once again.
obj = testhelper.owned_by_library_get_instance_list()[0]
self.assertEquals(obj.__grefcount__, 2)
obj.release()
self.assertEquals(obj.__grefcount__, 1)
def testFloatingAndSunk(self):
# Upon creation, the refcount of the object should be 2:
# - someone already has a reference on the new object.
# - the python wrapper should hold its own reference.
obj = testhelper.FloatingAndSunk()
self.assertEquals(obj.__grefcount__, 2)
# We ask the library to release its reference, so the only
# remaining ref should be our wrapper's. Once the wrapper
# will run out of scope, the object will get finalized.
obj.release()
self.assertEquals(obj.__grefcount__, 1)
def testFloatingAndSunkOutOfScope(self):
obj = testhelper.FloatingAndSunk()
self.assertEquals(obj.__grefcount__, 2)
# We are manually taking the object out of scope. This means
# that our wrapper has been freed, and its reference dropped. We
# cannot check it but the refcount should now be 1 (the ref held
# by the library is still there, we didn't call release()
obj = None
# When we get the object back from the lib, the wrapper is
# re-created, so our refcount will be 2 once again.
obj = testhelper.floating_and_sunk_get_instance_list()[0]
self.assertEquals(obj.__grefcount__, 2)
obj.release()
self.assertEquals(obj.__grefcount__, 1)
def testFloatingAndSunkUsingGObjectNew(self):
# Upon creation, the refcount of the object should be 2:
# - someone already has a reference on the new object.
# - the python wrapper should hold its own reference.
obj = gobject.new(testhelper.FloatingAndSunk)
self.assertEquals(obj.__grefcount__, 2)
# We ask the library to release its reference, so the only
# remaining ref should be our wrapper's. Once the wrapper
# will run out of scope, the object will get finalized.
obj.release()
self.assertEquals(obj.__grefcount__, 1)
def testFloatingAndSunkOutOfScopeUsingGObjectNew(self):
obj = gobject.new(testhelper.FloatingAndSunk)
self.assertEquals(obj.__grefcount__, 2)
# We are manually taking the object out of scope. This means
# that our wrapper has been freed, and its reference dropped. We
# cannot check it but the refcount should now be 1 (the ref held
# by the library is still there, we didn't call release()
obj = None
# When we get the object back from the lib, the wrapper is
# re-created, so our refcount will be 2 once again.
obj = testhelper.floating_and_sunk_get_instance_list()[0]
self.assertEquals(obj.__grefcount__, 2)
obj.release()
self.assertEquals(obj.__grefcount__, 1)
class A(gobject.GObject):
def __init__(self):
super(A, self).__init__()
class TestPythonReferenceCounting(unittest.TestCase):
# Newly created instances should alwayshave two references: one for
# the GC, and one for the bound variable in the local scope.
def testNewInstanceHasTwoRefs(self):
obj = gobject.GObject()
self.assertEquals(sys.getrefcount(obj), 2)
def testNewInstanceHasTwoRefsUsingGObjectNew(self):
obj = gobject.new(gobject.GObject)
self.assertEquals(sys.getrefcount(obj), 2)
def testNewSubclassInstanceHasTwoRefs(self):
obj = A()
self.assertEquals(sys.getrefcount(obj), 2)
def testNewSubclassInstanceHasTwoRefsUsingGObjectNew(self):
obj = gobject.new(A)
self.assertEquals(sys.getrefcount(obj), 2)
|
