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Diffstat (limited to 'libc/private/bionic_atomic_gcc_builtin.h')
-rw-r--r-- | libc/private/bionic_atomic_gcc_builtin.h | 50 |
1 files changed, 0 insertions, 50 deletions
diff --git a/libc/private/bionic_atomic_gcc_builtin.h b/libc/private/bionic_atomic_gcc_builtin.h deleted file mode 100644 index 70eb861fe..000000000 --- a/libc/private/bionic_atomic_gcc_builtin.h +++ /dev/null @@ -1,50 +0,0 @@ -/* - * Copyright (C) 2011 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 BIONIC_ATOMIC_GCC_BUILTIN_H -#define BIONIC_ATOMIC_GCC_BUILTIN_H - -/* - * This header file is used by default if we don't have optimized atomic - * routines for a given platform. See bionic_atomic_arm.h and - * bionic_atomic_x86.h for examples. - * - * Note that the GCC builtins include barriers that aren't present in - * the architecture-specific assembler versions. - */ - -__ATOMIC_INLINE__ void __bionic_memory_barrier() { - __sync_synchronize(); -} - -__ATOMIC_INLINE__ int __bionic_cmpxchg(int32_t old_value, int32_t new_value, volatile int32_t* ptr) { - /* We must return 0 on success. */ - return __sync_val_compare_and_swap(ptr, old_value, new_value) != old_value; -} - -__ATOMIC_INLINE__ int32_t __bionic_swap(int32_t new_value, volatile int32_t* ptr) { - int32_t old_value; - do { - old_value = *ptr; - } while (__sync_val_compare_and_swap(ptr, old_value, new_value) != old_value); - return old_value; -} - -__ATOMIC_INLINE__ int32_t __bionic_atomic_dec(volatile int32_t* ptr) { - /* We must return the old value. */ - return __sync_fetch_and_add(ptr, -1); -} - -#endif /* BIONIC_ATOMIC_GCC_BUILTIN_H */ |