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/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ANDROID_CUTILS_ATOMIC_INLINE_H
#define ANDROID_CUTILS_ATOMIC_INLINE_H
/*
* Inline declarations and macros for some special-purpose atomic
* operations. These are intended for rare circumstances where a
* memory barrier needs to be issued inline rather than as a function
* call.
*
* Most code should not use these.
*
* Anything that does include this file must set ANDROID_SMP to either
* 0 or 1, indicating compilation for UP or SMP, respectively.
*
* Macros defined in this header:
*
* void ANDROID_MEMBAR_FULL(void)
* Full memory barrier. Provides a compiler reordering barrier, and
* on SMP systems emits an appropriate instruction.
*/
#if !defined(ANDROID_SMP)
# error "Must define ANDROID_SMP before including atomic-inline.h"
#endif
#if defined(__arm__)
#include <cutils/atomic-arm.h>
#elif defined(__i386__) || defined(__x86_64__)
#include <cutils/atomic-x86.h>
#elif defined(__sh__)
/* implementation is in atomic-android-sh.c */
#else
#error atomic operations are unsupported
#endif
#if ANDROID_SMP == 0
#define ANDROID_MEMBAR_FULL android_compiler_barrier
#else
#define ANDROID_MEMBAR_FULL android_memory_barrier
#endif
#if ANDROID_SMP == 0
#define ANDROID_MEMBAR_STORE android_compiler_barrier
#else
#define ANDROID_MEMBAR_STORE android_memory_store_barrier
#endif
#endif /* ANDROID_CUTILS_ATOMIC_INLINE_H */
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