diff options
Diffstat (limited to 'libavutil/atomic_gcc.h')
| -rw-r--r-- | libavutil/atomic_gcc.h | 25 |
1 files changed, 21 insertions, 4 deletions
diff --git a/libavutil/atomic_gcc.h b/libavutil/atomic_gcc.h index 9470e8e50b..5f9fc49ba0 100644 --- a/libavutil/atomic_gcc.h +++ b/libavutil/atomic_gcc.h @@ -1,20 +1,20 @@ /* * Copyright (c) 2012 Ronald S. Bultje <rsbultje@gmail.com> * - * This file is part of Libav. + * This file is part of FFmpeg. * - * Libav is free software; you can redistribute it and/or + * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * - * Libav is distributed in the hope that it will be useful, + * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public - * License along with Libav; if not, write to the Free Software + * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ @@ -28,27 +28,40 @@ #define avpriv_atomic_int_get atomic_int_get_gcc static inline int atomic_int_get_gcc(volatile int *ptr) { +#if HAVE_ATOMIC_COMPARE_EXCHANGE + return __atomic_load_n(ptr, __ATOMIC_SEQ_CST); +#else __sync_synchronize(); return *ptr; +#endif } #define avpriv_atomic_int_set atomic_int_set_gcc static inline void atomic_int_set_gcc(volatile int *ptr, int val) { +#if HAVE_ATOMIC_COMPARE_EXCHANGE + __atomic_store_n(ptr, val, __ATOMIC_SEQ_CST); +#else *ptr = val; __sync_synchronize(); +#endif } #define avpriv_atomic_int_add_and_fetch atomic_int_add_and_fetch_gcc static inline int atomic_int_add_and_fetch_gcc(volatile int *ptr, int inc) { +#if HAVE_ATOMIC_COMPARE_EXCHANGE + return __atomic_add_fetch(ptr, inc, __ATOMIC_SEQ_CST); +#else return __sync_add_and_fetch(ptr, inc); +#endif } #define avpriv_atomic_ptr_cas atomic_ptr_cas_gcc static inline void *atomic_ptr_cas_gcc(void * volatile *ptr, void *oldval, void *newval) { +#if HAVE_SYNC_VAL_COMPARE_AND_SWAP #ifdef __ARMCC_VERSION // armcc will throw an error if ptr is not an integer type volatile uintptr_t *tmp = (volatile uintptr_t*)ptr; @@ -56,6 +69,10 @@ static inline void *atomic_ptr_cas_gcc(void * volatile *ptr, #else return __sync_val_compare_and_swap(ptr, oldval, newval); #endif +#else + __atomic_compare_exchange_n(ptr, &oldval, newval, 0, __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST); + return oldval; +#endif } #endif /* AVUTIL_ATOMIC_GCC_H */ |