1/* 2 * Copyright (C) 2010 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#ifndef ANDROID_CUTILS_ATOMIC_INLINE_H 18#define ANDROID_CUTILS_ATOMIC_INLINE_H 19 20#ifdef __cplusplus 21extern "C" { 22#endif 23 24/* 25 * Inline declarations and macros for some special-purpose atomic 26 * operations. These are intended for rare circumstances where a 27 * memory barrier needs to be issued inline rather than as a function 28 * call. 29 * 30 * Most code should not use these. 31 * 32 * Anything that does include this file must set ANDROID_SMP to either 33 * 0 or 1, indicating compilation for UP or SMP, respectively. 34 * 35 * Macros defined in this header: 36 * 37 * void ANDROID_MEMBAR_FULL(void) 38 * Full memory barrier. Provides a compiler reordering barrier, and 39 * on SMP systems emits an appropriate instruction. 40 */ 41 42#if !defined(ANDROID_SMP) 43# error "Must define ANDROID_SMP before including atomic-inline.h" 44#endif 45 46#if defined(__aarch64__) 47#include <cutils/atomic-arm64.h> 48#elif defined(__arm__) 49#include <cutils/atomic-arm.h> 50#elif defined(__i386__) 51#include <cutils/atomic-x86.h> 52#elif defined(__x86_64__) 53#include <cutils/atomic-x86_64.h> 54#elif defined(__mips64) 55#include <cutils/atomic-mips64.h> 56#elif defined(__mips__) 57#include <cutils/atomic-mips.h> 58#else 59#error atomic operations are unsupported 60#endif 61 62#if ANDROID_SMP == 0 63#define ANDROID_MEMBAR_FULL android_compiler_barrier 64#else 65#define ANDROID_MEMBAR_FULL android_memory_barrier 66#endif 67 68#ifdef __cplusplus 69} 70#endif 71 72#endif /* ANDROID_CUTILS_ATOMIC_INLINE_H */ 73