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1 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 // This file is an internal atomic implementation, use base/atomicops.h instead. | 5 // This file is an internal atomic implementation, use base/atomicops.h instead. |
6 | 6 |
7 #ifndef BASE_ATOMICOPS_INTERNALS_X86_MSVC_H_ | 7 #ifndef BASE_ATOMICOPS_INTERNALS_X86_MSVC_H_ |
8 #define BASE_ATOMICOPS_INTERNALS_X86_MSVC_H_ | 8 #define BASE_ATOMICOPS_INTERNALS_X86_MSVC_H_ |
9 | 9 |
10 #include <windows.h> | 10 #include <windows.h> |
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102 | 102 |
103 inline Atomic32 Release_Load(volatile const Atomic32* ptr) { | 103 inline Atomic32 Release_Load(volatile const Atomic32* ptr) { |
104 MemoryBarrier(); | 104 MemoryBarrier(); |
105 return *ptr; | 105 return *ptr; |
106 } | 106 } |
107 | 107 |
108 #if defined(_WIN64) | 108 #if defined(_WIN64) |
109 | 109 |
110 // 64-bit low-level operations on 64-bit platform. | 110 // 64-bit low-level operations on 64-bit platform. |
111 | 111 |
112 COMPILE_ASSERT(sizeof(Atomic64) == sizeof(PVOID), atomic_word_is_atomic); | 112 static_assert(sizeof(Atomic64) == sizeof(PVOID), "atomic word is atomic"); |
113 | 113 |
114 inline Atomic64 NoBarrier_CompareAndSwap(volatile Atomic64* ptr, | 114 inline Atomic64 NoBarrier_CompareAndSwap(volatile Atomic64* ptr, |
115 Atomic64 old_value, | 115 Atomic64 old_value, |
116 Atomic64 new_value) { | 116 Atomic64 new_value) { |
117 PVOID result = InterlockedCompareExchangePointer( | 117 PVOID result = InterlockedCompareExchangePointer( |
118 reinterpret_cast<volatile PVOID*>(ptr), | 118 reinterpret_cast<volatile PVOID*>(ptr), |
119 reinterpret_cast<PVOID>(new_value), reinterpret_cast<PVOID>(old_value)); | 119 reinterpret_cast<PVOID>(new_value), reinterpret_cast<PVOID>(old_value)); |
120 return reinterpret_cast<Atomic64>(result); | 120 return reinterpret_cast<Atomic64>(result); |
121 } | 121 } |
122 | 122 |
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186 return NoBarrier_CompareAndSwap(ptr, old_value, new_value); | 186 return NoBarrier_CompareAndSwap(ptr, old_value, new_value); |
187 } | 187 } |
188 | 188 |
189 | 189 |
190 #endif // defined(_WIN64) | 190 #endif // defined(_WIN64) |
191 | 191 |
192 } // namespace subtle | 192 } // namespace subtle |
193 } // namespace base | 193 } // namespace base |
194 | 194 |
195 #endif // BASE_ATOMICOPS_INTERNALS_X86_MSVC_H_ | 195 #endif // BASE_ATOMICOPS_INTERNALS_X86_MSVC_H_ |
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