1/*
2 *  Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
3 *
4 *  Use of this source code is governed by a BSD-style license
5 *  that can be found in the LICENSE file in the root of the source
6 *  tree. An additional intellectual property rights grant can be found
7 *  in the file PATENTS.  All contributing project authors may
8 *  be found in the AUTHORS file in the root of the source tree.
9 */
10
11// Various inline functions and macros to fix compilation of 32 bit target
12// on MSVC with /Wp64 flag enabled.
13
14// The original code can be found here:
15// http://src.chromium.org/svn/trunk/src/base/fix_wp64.h
16
17#ifndef WEBRTC_SYSTEM_WRAPPERS_SOURCE_FIX_INTERLOCKED_EXCHANGE_POINTER_WINDOWS_H_
18#define WEBRTC_SYSTEM_WRAPPERS_SOURCE_FIX_INTERLOCKED_EXCHANGE_POINTER_WINDOWS_H_
19
20#include <windows.h>
21
22// Platform SDK fixes when building with /Wp64 for a 32 bits target.
23#if !defined(_WIN64) && defined(_Wp64)
24
25#ifdef InterlockedExchangePointer
26#undef InterlockedExchangePointer
27// The problem is that the macro provided for InterlockedExchangePointer() is
28// doing a (LONG) C-style cast that triggers invariably the warning C4312 when
29// building on 32 bits.
30inline void* InterlockedExchangePointer(void* volatile* target, void* value) {
31  return reinterpret_cast<void*>(static_cast<LONG_PTR>(InterlockedExchange(
32      reinterpret_cast<volatile LONG*>(target),
33      static_cast<LONG>(reinterpret_cast<LONG_PTR>(value)))));
34}
35#endif  // #ifdef InterlockedExchangePointer
36
37#endif // #if !defined(_WIN64) && defined(_Wp64)
38
39#endif // WEBRTC_SYSTEM_WRAPPERS_SOURCE_FIX_INTERLOCKED_EXCHANGE_POINTER_WINDOWS_H_
40