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1 // Protocol Buffers - Google's data interchange format | 1 // Protocol Buffers - Google's data interchange format |
2 // Copyright 2012 Google Inc. All rights reserved. | 2 // Copyright 2012 Google Inc. All rights reserved. |
3 // https://developers.google.com/protocol-buffers/ | 3 // https://developers.google.com/protocol-buffers/ |
4 // | 4 // |
5 // Redistribution and use in source and binary forms, with or without | 5 // Redistribution and use in source and binary forms, with or without |
6 // modification, are permitted provided that the following conditions are | 6 // modification, are permitted provided that the following conditions are |
7 // met: | 7 // met: |
8 // | 8 // |
9 // * Redistributions of source code must retain the above copyright | 9 // * Redistributions of source code must retain the above copyright |
10 // notice, this list of conditions and the following disclaimer. | 10 // notice, this list of conditions and the following disclaimer. |
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37 #include <google/protobuf/stubs/atomicops.h> | 37 #include <google/protobuf/stubs/atomicops.h> |
38 | 38 |
39 #ifdef GOOGLE_PROTOBUF_ATOMICOPS_INTERNALS_X86_MSVC_H_ | 39 #ifdef GOOGLE_PROTOBUF_ATOMICOPS_INTERNALS_X86_MSVC_H_ |
40 | 40 |
41 #include <windows.h> | 41 #include <windows.h> |
42 | 42 |
43 namespace google { | 43 namespace google { |
44 namespace protobuf { | 44 namespace protobuf { |
45 namespace internal { | 45 namespace internal { |
46 | 46 |
47 inline void MemoryBarrierInternal() { | 47 inline void MemoryBarrier() { |
48 // On ARM this is a define while on x86/x64 this is | 48 // We use MemoryBarrier from WinNT.h |
49 // a function declared in WinNT.h | 49 ::MemoryBarrier(); |
50 MemoryBarrier(); | |
51 } | 50 } |
52 | 51 |
53 Atomic32 NoBarrier_CompareAndSwap(volatile Atomic32* ptr, | 52 Atomic32 NoBarrier_CompareAndSwap(volatile Atomic32* ptr, |
54 Atomic32 old_value, | 53 Atomic32 old_value, |
55 Atomic32 new_value) { | 54 Atomic32 new_value) { |
56 LONG result = InterlockedCompareExchange( | 55 LONG result = InterlockedCompareExchange( |
57 reinterpret_cast<volatile LONG*>(ptr), | 56 reinterpret_cast<volatile LONG*>(ptr), |
58 static_cast<LONG>(new_value), | 57 static_cast<LONG>(new_value), |
59 static_cast<LONG>(old_value)); | 58 static_cast<LONG>(old_value)); |
60 return static_cast<Atomic32>(result); | 59 return static_cast<Atomic32>(result); |
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104 } | 103 } |
105 | 104 |
106 #endif // defined(_WIN64) | 105 #endif // defined(_WIN64) |
107 | 106 |
108 } // namespace internal | 107 } // namespace internal |
109 } // namespace protobuf | 108 } // namespace protobuf |
110 } // namespace google | 109 } // namespace google |
111 | 110 |
112 #endif // GOOGLE_PROTOBUF_ATOMICOPS_INTERNALS_X86_MSVC_H_ | 111 #endif // GOOGLE_PROTOBUF_ATOMICOPS_INTERNALS_X86_MSVC_H_ |
113 #endif // GOOGLE_PROTOBUF_NO_THREAD_SAFETY | 112 #endif // GOOGLE_PROTOBUF_NO_THREAD_SAFETY |
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