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Diffstat (limited to 'include/cutils/atomic-x86_64.h')
-rw-r--r-- | include/cutils/atomic-x86_64.h | 151 |
1 files changed, 0 insertions, 151 deletions
diff --git a/include/cutils/atomic-x86_64.h b/include/cutils/atomic-x86_64.h deleted file mode 100644 index 99cb070..0000000 --- a/include/cutils/atomic-x86_64.h +++ /dev/null @@ -1,151 +0,0 @@ -/* - * Copyright (C) 2014 The Android Open Source Project - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * * Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * * Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in - * the documentation and/or other materials provided with the - * distribution. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS - * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE - * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, - * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, - * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS - * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED - * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, - * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT - * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -#ifndef ANDROID_CUTILS_ATOMIC_X86_64_H -#define ANDROID_CUTILS_ATOMIC_X86_64_H - -#include <stdint.h> - -#ifndef ANDROID_ATOMIC_INLINE -#define ANDROID_ATOMIC_INLINE inline __attribute__((always_inline)) -#endif - -extern ANDROID_ATOMIC_INLINE -void android_compiler_barrier(void) -{ - __asm__ __volatile__ ("" : : : "memory"); -} - -extern ANDROID_ATOMIC_INLINE -void android_memory_barrier(void) -{ - __asm__ __volatile__ ("mfence" : : : "memory"); -} - -extern ANDROID_ATOMIC_INLINE -int32_t android_atomic_acquire_load(volatile const int32_t *ptr) -{ - int32_t value = *ptr; - android_compiler_barrier(); - return value; -} - -extern ANDROID_ATOMIC_INLINE -int32_t android_atomic_release_load(volatile const int32_t *ptr) -{ - android_memory_barrier(); - return *ptr; -} - -extern ANDROID_ATOMIC_INLINE -void android_atomic_acquire_store(int32_t value, volatile int32_t *ptr) -{ - *ptr = value; - android_memory_barrier(); -} - -extern ANDROID_ATOMIC_INLINE -void android_atomic_release_store(int32_t value, volatile int32_t *ptr) -{ - android_compiler_barrier(); - *ptr = value; -} - -extern ANDROID_ATOMIC_INLINE -int android_atomic_cas(int32_t old_value, int32_t new_value, - volatile int32_t *ptr) -{ - int32_t prev; - __asm__ __volatile__ ("lock; cmpxchgl %1, %2" - : "=a" (prev) - : "q" (new_value), "m" (*ptr), "0" (old_value) - : "memory"); - return prev != old_value; -} - -extern ANDROID_ATOMIC_INLINE -int android_atomic_acquire_cas(int32_t old_value, int32_t new_value, - volatile int32_t *ptr) -{ - /* Loads are not reordered with other loads. */ - return android_atomic_cas(old_value, new_value, ptr); -} - -extern ANDROID_ATOMIC_INLINE -int android_atomic_release_cas(int32_t old_value, int32_t new_value, - volatile int32_t *ptr) -{ - /* Stores are not reordered with other stores. */ - return android_atomic_cas(old_value, new_value, ptr); -} - -extern ANDROID_ATOMIC_INLINE -int32_t android_atomic_add(int32_t increment, volatile int32_t *ptr) -{ - __asm__ __volatile__ ("lock; xaddl %0, %1" - : "+r" (increment), "+m" (*ptr) - : : "memory"); - /* increment now holds the old value of *ptr */ - return increment; -} - -extern ANDROID_ATOMIC_INLINE -int32_t android_atomic_inc(volatile int32_t *addr) -{ - return android_atomic_add(1, addr); -} - -extern ANDROID_ATOMIC_INLINE -int32_t android_atomic_dec(volatile int32_t *addr) -{ - return android_atomic_add(-1, addr); -} - -extern ANDROID_ATOMIC_INLINE -int32_t android_atomic_and(int32_t value, volatile int32_t *ptr) -{ - int32_t prev, status; - do { - prev = *ptr; - status = android_atomic_cas(prev, prev & value, ptr); - } while (__builtin_expect(status != 0, 0)); - return prev; -} - -extern ANDROID_ATOMIC_INLINE -int32_t android_atomic_or(int32_t value, volatile int32_t *ptr) -{ - int32_t prev, status; - do { - prev = *ptr; - status = android_atomic_cas(prev, prev | value, ptr); - } while (__builtin_expect(status != 0, 0)); - return prev; -} - -#endif /* ANDROID_CUTILS_ATOMIC_X86_64_H */ |