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