1 files changed, 103 insertions, 0 deletions
diff --git a/utils/timings.cc b/utils/timings.cc
new file mode 100644
index 000000000..819d965f7
--- /dev/null
+++ b/utils/timings.cc
@@ -0,0 +1,103 @@
+/* Definitions of simple functions for printing timings.
+   Copyright (C) 2001-2010 Roberto Bagnara <bagnara@cs.unipr.it>
+   Copyright (C) 2010-2011 BUGSENG srl (http://bugseng.com)
+
+This file is part of the Parma Polyhedra Library (PPL).
+
+The PPL is free software; you can redistribute it and/or modify it
+under the terms of the GNU General Public License as published by the
+Free Software Foundation; either version 3 of the License, or (at your
+option) any later version.
+
+The PPL is distributed in the hope that it will be useful, but WITHOUT
+ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software Foundation,
+Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111-1307, USA.
+
+For the most up-to-date information see the Parma Polyhedra Library
+site: http://www.cs.unipr.it/ppl/ . */
+
+#include <ppl-config.h>
+
+#include "timings.hh"
+#include <cassert>
+#include <ctime>
+#include <iostream>
+#include <iomanip>
+#include <cstring>
+#include <cerrno>
+#include <cstdlib>
+
+#ifdef PPL_HAVE_SYS_TIME_H
+# include <sys/time.h>
+#endif
+
+#ifdef PPL_HAVE_SYS_RESOURCE_H
+// This should be included after <time.h> and <sys/time.h> so as to make
+// sure we have the definitions for, e.g., `ru_utime'.
+# include <sys/resource.h>
+#endif
+
+using namespace std;
+
+#ifdef PPL_HAVE_TIMEVAL
+// To save the time when start_clock is called.
+static struct timeval saved_ru_utime;
+#endif
+
+void
+start_clock() {
+#if defined(PPL_HAVE_DECL_GETRUSAGE) && defined(PPL_HAVE_TIMEVAL)
+  struct rusage rsg;
+  if (getrusage(RUSAGE_SELF, &rsg) != 0) {
+    cerr << "getrusage failed: " << strerror(errno) << endl;
+    exit(1);
+  }
+  else
+    saved_ru_utime = rsg.ru_utime;
+#endif
+}
+
+void
+print_clock(ostream& s) {
+#if defined(PPL_HAVE_DECL_GETRUSAGE) && defined(PPL_HAVE_TIMEVAL)
+  struct rusage rsg;
+  if (getrusage(RUSAGE_SELF, &rsg) != 0) {
+    cerr << "getrusage failed: " << strerror(errno) << endl;
+    exit(1);
+  }
+  else {
+    time_t current_secs = rsg.ru_utime.tv_sec;
+    time_t current_usecs = rsg.ru_utime.tv_usec;
+    time_t saved_secs = saved_ru_utime.tv_sec;
+    time_t saved_usecs = saved_ru_utime.tv_usec;
+    time_t secs;
+    time_t hsecs;
+    secs = current_secs - saved_secs;
+    if (current_usecs < saved_usecs) {
+      hsecs = (((1000000 + current_usecs) - saved_usecs) + 5000) / 10000;
+      if (hsecs < 100)
+	--secs;
+      else
+	hsecs = 0;
+    }
+    else {
+      hsecs = ((current_usecs - saved_usecs) + 5000) / 10000;
+      if (hsecs == 100) {
+	++secs;
+	hsecs = 0;
+      }
+    }
+    assert(hsecs >= 0 && hsecs < 100 && secs >= 0);
+    int fill_char = s.fill();
+    s << secs << "." << setfill('0') << setw(2) << hsecs;
+    s.fill(fill_char);
+  }
+#else
+  s << "(no clock available)";
+#endif
+}