1 // Protocol Buffers - Google's data interchange format
2 // Copyright 2012 Google Inc. All rights reserved.
3 // https://developers.google.com/protocol-buffers/
4 //
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30
31 // This file is an internal atomic implementation, use atomicops.h instead.
32
33 #ifndef GOOGLE_PROTOBUF_ATOMICOPS_INTERNALS_PNACL_H_
34 #define GOOGLE_PROTOBUF_ATOMICOPS_INTERNALS_PNACL_H_
35
36 namespace google {
37 namespace protobuf {
38 namespace internal {
39
NoBarrier_CompareAndSwap(volatile Atomic32 * ptr,Atomic32 old_value,Atomic32 new_value)40 inline Atomic32 NoBarrier_CompareAndSwap(volatile Atomic32* ptr,
41 Atomic32 old_value,
42 Atomic32 new_value) {
43 return __sync_val_compare_and_swap(ptr, old_value, new_value);
44 }
45
MemoryBarrier()46 inline void MemoryBarrier() {
47 __sync_synchronize();
48 }
49
Acquire_CompareAndSwap(volatile Atomic32 * ptr,Atomic32 old_value,Atomic32 new_value)50 inline Atomic32 Acquire_CompareAndSwap(volatile Atomic32* ptr,
51 Atomic32 old_value,
52 Atomic32 new_value) {
53 Atomic32 ret = NoBarrier_CompareAndSwap(ptr, old_value, new_value);
54 MemoryBarrier();
55 return ret;
56 }
57
Release_Store(volatile Atomic32 * ptr,Atomic32 value)58 inline void Release_Store(volatile Atomic32* ptr, Atomic32 value) {
59 MemoryBarrier();
60 *ptr = value;
61 }
62
Acquire_Load(volatile const Atomic32 * ptr)63 inline Atomic32 Acquire_Load(volatile const Atomic32* ptr) {
64 Atomic32 value = *ptr;
65 MemoryBarrier();
66 return value;
67 }
68
69 } // namespace internal
70 } // namespace protobuf
71 } // namespace google
72
73 #endif // GOOGLE_PROTOBUF_ATOMICOPS_INTERNALS_PNACL_H_
74