// Protocol Buffers - Google's data interchange format
// Copyright 2012 Google Inc. All rights reserved.
// http://code.google.com/p/protobuf/
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//
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// This file is an internal atomic implementation, use atomicops.h instead.
#ifndef GOOGLE_PROTOBUF_ATOMICOPS_INTERNALS_PNACL_H_
#define GOOGLE_PROTOBUF_ATOMICOPS_INTERNALS_PNACL_H_
namespace google {
namespace protobuf {
namespace internal {
inline Atomic32 NoBarrier_CompareAndSwap(volatile Atomic32* ptr,
Atomic32 old_value,
Atomic32 new_value) {
return __sync_val_compare_and_swap(ptr, old_value, new_value);
}
inline void MemoryBarrier() {
__sync_synchronize();
}
inline Atomic32 Acquire_CompareAndSwap(volatile Atomic32* ptr,
Atomic32 old_value,
Atomic32 new_value) {
Atomic32 ret = NoBarrier_CompareAndSwap(ptr, old_value, new_value);
MemoryBarrier();
return ret;
}
inline void Release_Store(volatile Atomic32* ptr, Atomic32 value) {
MemoryBarrier();
*ptr = value;
}
inline Atomic32 Acquire_Load(volatile const Atomic32* ptr) {
Atomic32 value = *ptr;
MemoryBarrier();
return value;
}
} // namespace internal
} // namespace protobuf
} // namespace google
#endif // GOOGLE_PROTOBUF_ATOMICOPS_INTERNALS_PNACL_H_
