1// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file under third_party_mods/chromium directory of
4// source tree or at
5// http://src.chromium.org/viewvc/chrome/trunk/src/LICENSE
6
7// Various inline functions and macros to fix compilation of 32 bit target
8// on MSVC with /Wp64 flag enabled.
9
10// The original code can be found here:
11// http://src.chromium.org/svn/trunk/src/base/fix_wp64.h
12
13#ifndef WEBRTC_SYSTEM_WRAPPERS_SOURCE_FIX_INTERLOCKED_EXCHANGE_POINTER_WINDOWS_H_
14#define WEBRTC_SYSTEM_WRAPPERS_SOURCE_FIX_INTERLOCKED_EXCHANGE_POINTER_WINDOWS_H_
15
16#include <windows.h>
17
18// Platform SDK fixes when building with /Wp64 for a 32 bits target.
19#if !defined(_WIN64) && defined(_Wp64)
20
21#ifdef InterlockedExchangePointer
22#undef InterlockedExchangePointer
23// The problem is that the macro provided for InterlockedExchangePointer() is
24// doing a (LONG) C-style cast that triggers invariably the warning C4312 when
25// building on 32 bits.
26inline void* InterlockedExchangePointer(void* volatile* target, void* value) {
27  return reinterpret_cast<void*>(static_cast<LONG_PTR>(InterlockedExchange(
28      reinterpret_cast<volatile LONG*>(target),
29      static_cast<LONG>(reinterpret_cast<LONG_PTR>(value)))));
30}
31#endif  // #ifdef InterlockedExchangePointer
32
33#endif // #if !defined(_WIN64) && defined(_Wp64)
34
35#endif // WEBRTC_SYSTEM_WRAPPERS_SOURCE_FIX_INTERLOCKED_EXCHANGE_POINTER_WINDOWS_H_
36