atomicops_internals_pnacl.h

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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_