1 files changed, 77 insertions, 0 deletions
diff --git a/base/synchronization/condition_variable_posix.cc b/base/synchronization/condition_variable_posix.cc
new file mode 100644
index 0000000..eff7053
--- /dev/null
+++ b/base/synchronization/condition_variable_posix.cc
@@ -0,0 +1,77 @@
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/synchronization/condition_variable.h"
+
+#include <errno.h>
+#include <sys/time.h>
+
+#include "base/logging.h"
+#include "base/synchronization/lock.h"
+#include "base/time.h"
+
+namespace base {
+
+ConditionVariable::ConditionVariable(Lock* user_lock)
+    : user_mutex_(user_lock->lock_.os_lock())
+#if !defined(NDEBUG)
+    , user_lock_(user_lock)
+#endif
+{
+  int rv = pthread_cond_init(&condition_, NULL);
+  DCHECK(rv == 0);
+}
+
+ConditionVariable::~ConditionVariable() {
+  int rv = pthread_cond_destroy(&condition_);
+  DCHECK(rv == 0);
+}
+
+void ConditionVariable::Wait() {
+#if !defined(NDEBUG)
+  user_lock_->CheckHeldAndUnmark();
+#endif
+  int rv = pthread_cond_wait(&condition_, user_mutex_);
+  DCHECK(rv == 0);
+#if !defined(NDEBUG)
+  user_lock_->CheckUnheldAndMark();
+#endif
+}
+
+void ConditionVariable::TimedWait(const TimeDelta& max_time) {
+  int64 usecs = max_time.InMicroseconds();
+
+  // The timeout argument to pthread_cond_timedwait is in absolute time.
+  struct timeval now;
+  gettimeofday(&now, NULL);
+
+  struct timespec abstime;
+  abstime.tv_sec = now.tv_sec + (usecs / Time::kMicrosecondsPerSecond);
+  abstime.tv_nsec = (now.tv_usec + (usecs % Time::kMicrosecondsPerSecond)) *
+                    Time::kNanosecondsPerMicrosecond;
+  abstime.tv_sec += abstime.tv_nsec / Time::kNanosecondsPerSecond;
+  abstime.tv_nsec %= Time::kNanosecondsPerSecond;
+  DCHECK(abstime.tv_sec >= now.tv_sec);  // Overflow paranoia
+
+#if !defined(NDEBUG)
+  user_lock_->CheckHeldAndUnmark();
+#endif
+  int rv = pthread_cond_timedwait(&condition_, user_mutex_, &abstime);
+  DCHECK(rv == 0 || rv == ETIMEDOUT);
+#if !defined(NDEBUG)
+  user_lock_->CheckUnheldAndMark();
+#endif
+}
+
+void ConditionVariable::Broadcast() {
+  int rv = pthread_cond_broadcast(&condition_);
+  DCHECK(rv == 0);
+}
+
+void ConditionVariable::Signal() {
+  int rv = pthread_cond_signal(&condition_);
+  DCHECK(rv == 0);
+}
+
+}  // namespace base