diff options
Diffstat (limited to 'include/cutils/atomic-arm.h')
| -rw-r--r-- | include/cutils/atomic-arm.h | 167 |
1 files changed, 0 insertions, 167 deletions
diff --git a/include/cutils/atomic-arm.h b/include/cutils/atomic-arm.h deleted file mode 100644 index 6b031b678..000000000 --- a/include/cutils/atomic-arm.h +++ /dev/null @@ -1,167 +0,0 @@ -/* - * Copyright (C) 2010 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 ANDROID_CUTILS_ATOMIC_ARM_H -#define ANDROID_CUTILS_ATOMIC_ARM_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() -{ - __asm__ __volatile__ ("" : : : "memory"); -} - -extern ANDROID_ATOMIC_INLINE void android_memory_barrier() -{ -#if ANDROID_SMP == 0 - android_compiler_barrier(); -#else - __asm__ __volatile__ ("dmb" : : : "memory"); -#endif -} - -extern ANDROID_ATOMIC_INLINE -int32_t android_atomic_acquire_load(volatile const int32_t *ptr) -{ - int32_t value = *ptr; - android_memory_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_memory_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, status; - do { - __asm__ __volatile__ ("ldrex %0, [%3]\n" - "mov %1, #0\n" - "teq %0, %4\n" -#ifdef __thumb2__ - "it eq\n" -#endif - "strexeq %1, %5, [%3]" - : "=&r" (prev), "=&r" (status), "+m"(*ptr) - : "r" (ptr), "Ir" (old_value), "r" (new_value) - : "cc"); - } while (__builtin_expect(status != 0, 0)); - 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) -{ - int status = android_atomic_cas(old_value, new_value, ptr); - android_memory_barrier(); - return status; -} - -extern ANDROID_ATOMIC_INLINE -int android_atomic_release_cas(int32_t old_value, int32_t new_value, - volatile int32_t *ptr) -{ - android_memory_barrier(); - 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) -{ - int32_t prev, tmp, status; - android_memory_barrier(); - do { - __asm__ __volatile__ ("ldrex %0, [%4]\n" - "add %1, %0, %5\n" - "strex %2, %1, [%4]" - : "=&r" (prev), "=&r" (tmp), - "=&r" (status), "+m" (*ptr) - : "r" (ptr), "Ir" (increment) - : "cc"); - } while (__builtin_expect(status != 0, 0)); - return prev; -} - -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, tmp, status; - android_memory_barrier(); - do { - __asm__ __volatile__ ("ldrex %0, [%4]\n" - "and %1, %0, %5\n" - "strex %2, %1, [%4]" - : "=&r" (prev), "=&r" (tmp), - "=&r" (status), "+m" (*ptr) - : "r" (ptr), "Ir" (value) - : "cc"); - } 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, tmp, status; - android_memory_barrier(); - do { - __asm__ __volatile__ ("ldrex %0, [%4]\n" - "orr %1, %0, %5\n" - "strex %2, %1, [%4]" - : "=&r" (prev), "=&r" (tmp), - "=&r" (status), "+m" (*ptr) - : "r" (ptr), "Ir" (value) - : "cc"); - } while (__builtin_expect(status != 0, 0)); - return prev; -} - -#endif /* ANDROID_CUTILS_ATOMIC_ARM_H */ |