2 * Copyright (C) 2010 The Android Open Source Project
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
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
17 #ifndef ANDROID_CUTILS_ATOMIC_INLINE_H
18 #define ANDROID_CUTILS_ATOMIC_INLINE_H
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
30 * Most code should not use these.
32 * Anything that does include this file must set ANDROID_SMP to either
33 * 0 or 1, indicating compilation for UP or SMP, respectively.
35 * Macros defined in this header:
37 * void ANDROID_MEMBAR_FULL(void)
38 * Full memory barrier. Provides a compiler reordering barrier, and
39 * on SMP systems emits an appropriate instruction.
42 #if !defined(ANDROID_SMP)
43 # error "Must define ANDROID_SMP before including atomic-inline.h"
47 #include <cutils/atomic-arm.h>
48 #elif defined(__i386__) || defined(__x86_64__)
49 #include <cutils/atomic-x86.h>
50 #elif defined(__mips__)
51 #include <cutils/atomic-mips.h>
53 #error atomic operations are unsupported
57 #define ANDROID_MEMBAR_FULL android_compiler_barrier
59 #define ANDROID_MEMBAR_FULL android_memory_barrier
63 #define ANDROID_MEMBAR_STORE android_compiler_barrier
65 #define ANDROID_MEMBAR_STORE android_memory_store_barrier
72 #endif /* ANDROID_CUTILS_ATOMIC_INLINE_H */