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diff --git a/src/system_wrappers/interface/atomic32_wrapper.h b/src/system_wrappers/interface/atomic32_wrapper.h
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+++ b/src/system_wrappers/interface/atomic32_wrapper.h
@@ -0,0 +1,55 @@
+/*
+ *  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.
+ */
+
+// Atomic system independant 32-bit integer.
+// Note: uses full memory barriers.
+// Note: assumes 32-bit (or higher) system
+#ifndef WEBRTC_SYSTEM_WRAPPERS_INTERFACE_ATOMIC32_WRAPPER_H_
+#define WEBRTC_SYSTEM_WRAPPERS_INTERFACE_ATOMIC32_WRAPPER_H_
+
+#include "common_types.h"
+
+namespace webrtc {
+class Atomic32Impl;
+class Atomic32Wrapper
+{
+public:
+    Atomic32Wrapper(WebRtc_Word32 initialValue = 0);
+    ~Atomic32Wrapper();
+
+    // Prefix operator!
+    WebRtc_Word32 operator++();
+    WebRtc_Word32 operator--();
+
+    Atomic32Wrapper& operator=(const Atomic32Wrapper& rhs);
+    Atomic32Wrapper& operator=(WebRtc_Word32 rhs);
+
+    WebRtc_Word32 operator+=(WebRtc_Word32 rhs);
+    WebRtc_Word32 operator-=(WebRtc_Word32 rhs);
+
+    // Sets the value atomically to newValue if the value equals compare value.
+    // The function returns true if the exchange happened.
+    bool CompareExchange(WebRtc_Word32 newValue, WebRtc_Word32 compareValue);
+    WebRtc_Word32 Value() const;
+private:
+    // Disable the + and - operator since it's unclear what these operations
+    // should do.
+    Atomic32Wrapper operator+(const Atomic32Wrapper& rhs);
+    Atomic32Wrapper operator-(const Atomic32Wrapper& rhs);
+
+    WebRtc_Word32& operator++(int);
+    WebRtc_Word32& operator--(int);
+
+    // Cheshire cat to hide the implementation (faster than
+    // using virtual functions)
+    Atomic32Impl& _impl;
+};
+} // namespace webrtc
+#endif // WEBRTC_SYSTEM_WRAPPERS_INTERFACE_ATOMIC32_WRAPPER_H_