464431e65f
I usually call this a "store/store barrier" for maximum clarity, but the common way of describing it is "store barrier" or "store fence". This doesn't use "dmb st" yet since we're waiting on the toolchain update, but it gets the various macros and inline functions in place so we can use them in the VM. Bug 3003477 git cherry-pick 2ba5eec3972b4ce46feb677116534fcd3d136e0a Change-Id: Ifd2d3588be96aa529d490789436cf48c962021ba
64 lines
1.9 KiB
C
64 lines
1.9 KiB
C
/*
|
|
* 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 */
|