git-svn-id: http://webrtc.googlecode.com/svn/trunk@6 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/system_wrappers/source/condition_variable.cc b/system_wrappers/source/condition_variable.cc
new file mode 100644
index 0000000..7ca1b56
--- /dev/null
+++ b/system_wrappers/source/condition_variable.cc
@@ -0,0 +1,37 @@
+/*
+ *  Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#if defined(_WIN32)
+   #include <windows.h>
+   #include "condition_variable_wrapper.h"
+   #include "condition_variable_windows.h"
+#elif defined(WEBRTC_LINUX)
+   #include <pthread.h>
+   #include "condition_variable_wrapper.h"
+   #include "condition_variable_linux.h"
+#elif defined(WEBRTC_MAC) || defined(WEBRTC_MAC_INTEL)
+   #include <pthread.h>
+   #include "condition_variable_wrapper.h"
+   #include "condition_variable_linux.h"
+ #endif
+
+namespace webrtc {
+ConditionVariableWrapper*
+ConditionVariableWrapper::CreateConditionVariable()
+{
+#if defined(_WIN32)
+    return new ConditionVariableWindows;
+#elif defined(WEBRTC_LINUX) || defined(WEBRTC_MAC) || defined(WEBRTC_MAC_INTEL)
+    return ConditionVariableLinux::Create();
+#else
+    return NULL;
+#endif
+}
+} // namespace webrtc