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 */
17 #ifndef BIONIC_ATOMIC_INLINE_H
18 #define BIONIC_ATOMIC_INLINE_H
20 /*
21 * Inline declarations and macros for some special-purpose atomic
22 * operations. These are intended for rare circumstances where a
23 * memory barrier needs to be issued inline rather than as a function
24 * call.
25 *
26 * Macros defined in this header:
27 *
28 * void ANDROID_MEMBAR_FULL(void)
29 * Full memory barrier. Provides a compiler reordering barrier, and
30 * on SMP systems emits an appropriate instruction.
31 */
33 #if !defined(ANDROID_SMP)
34 # error "Must define ANDROID_SMP before including atomic-inline.h"
35 #endif
37 #ifdef __cplusplus
38 extern "C" {
39 #endif
41 /* Define __ATOMIC_INLINE__ to control the inlining of all atomics
42 * functions declared here. For a slight performance boost, we want
43 * all of them to be always_inline
44 */
45 #define __ATOMIC_INLINE__ static __inline__ __attribute__((always_inline))
47 #if defined(__aarch64__)
48 # include "bionic_atomic_aarch64.h"
49 #elif defined(__arm__)
50 # include "bionic_atomic_arm.h"
51 #elif defined(__i386__)
52 # include "bionic_atomic_x86.h"
53 #elif defined(__mips__)
54 # include "bionic_atomic_mips.h"
55 #else
56 # include "bionic_atomic_gcc_builtin.h"
57 #endif
59 #define ANDROID_MEMBAR_FULL __bionic_memory_barrier
61 #ifdef __cplusplus
62 } // extern "C"
63 #endif
65 #endif // BIONIC_ATOMIC_INLINE_H