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// Copyright 2013 Red Hat Inc. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Red Hat Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// This file is an internal atomic implementation, use atomicops.h instead.
#ifndef GOOGLE_PROTOBUF_ATOMICOPS_INTERNALS_GENERIC_GCC_H_
#define GOOGLE_PROTOBUF_ATOMICOPS_INTERNALS_GENERIC_GCC_H_
namespace google {
namespace protobuf {
namespace internal {
inline Atomic32 NoBarrier_CompareAndSwap(volatile Atomic32* ptr,
Atomic32 old_value,
Atomic32 new_value) {
__atomic_compare_exchange_n(ptr, &old_value, new_value, true,
__ATOMIC_RELAXED, __ATOMIC_RELAXED);
return old_value;
}
inline Atomic32 NoBarrier_AtomicExchange(volatile Atomic32* ptr,
Atomic32 new_value) {
return __atomic_exchange_n(ptr, new_value, __ATOMIC_RELAXED);
}
inline Atomic32 NoBarrier_AtomicIncrement(volatile Atomic32* ptr,
Atomic32 increment) {
return __atomic_add_fetch(ptr, increment, __ATOMIC_RELAXED);
}
inline Atomic32 Barrier_AtomicIncrement(volatile Atomic32* ptr,
Atomic32 increment) {
return __atomic_add_fetch(ptr, increment, __ATOMIC_SEQ_CST);
}
inline Atomic32 Acquire_CompareAndSwap(volatile Atomic32* ptr,
Atomic32 old_value,
Atomic32 new_value) {
__atomic_compare_exchange(ptr, &old_value, &new_value, true,
__ATOMIC_ACQUIRE, __ATOMIC_ACQUIRE);
return old_value;
}
inline Atomic32 Release_CompareAndSwap(volatile Atomic32* ptr,
Atomic32 old_value,
Atomic32 new_value) {
__atomic_compare_exchange_n(ptr, &old_value, new_value, true,
__ATOMIC_RELEASE, __ATOMIC_ACQUIRE);
return old_value;
}
inline void NoBarrier_Store(volatile Atomic32* ptr, Atomic32 value) {
__atomic_store_n(ptr, value, __ATOMIC_RELAXED);
}
inline void MemoryBarrier() {
__sync_synchronize();
}
inline void Acquire_Store(volatile Atomic32* ptr, Atomic32 value) {
__atomic_store_n(ptr, value, __ATOMIC_SEQ_CST);
}
inline void Release_Store(volatile Atomic32* ptr, Atomic32 value) {
__atomic_store_n(ptr, value, __ATOMIC_RELEASE);
}
inline Atomic32 NoBarrier_Load(volatile const Atomic32* ptr) {
return __atomic_load_n(ptr, __ATOMIC_RELAXED);
}
inline Atomic32 Acquire_Load(volatile const Atomic32* ptr) {
return __atomic_load_n(ptr, __ATOMIC_ACQUIRE);
}
inline Atomic32 Release_Load(volatile const Atomic32* ptr) {
return __atomic_load_n(ptr, __ATOMIC_SEQ_CST);
}
#ifdef __LP64__
inline void Release_Store(volatile Atomic64* ptr, Atomic64 value) {
__atomic_store_n(ptr, value, __ATOMIC_RELEASE);
}
inline Atomic64 Acquire_Load(volatile const Atomic64* ptr) {
return __atomic_load_n(ptr, __ATOMIC_ACQUIRE);
}
inline Atomic64 Acquire_CompareAndSwap(volatile Atomic64* ptr,
Atomic64 old_value,
Atomic64 new_value) {
__atomic_compare_exchange_n(ptr, &old_value, new_value, true,
__ATOMIC_ACQUIRE, __ATOMIC_ACQUIRE);
return old_value;
}
inline Atomic64 NoBarrier_CompareAndSwap(volatile Atomic64* ptr,
Atomic64 old_value,
Atomic64 new_value) {
__atomic_compare_exchange_n(ptr, &old_value, new_value, true,
__ATOMIC_RELAXED, __ATOMIC_RELAXED);
return old_value;
}
#endif // defined(__LP64__)
} // namespace internal
} // namespace protobuf
} // namespace google
#endif // GOOGLE_PROTOBUF_ATOMICOPS_INTERNALS_GENERIC_GCC_H_
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