2 * Copyright (c) 2012 Ronald S. Bultje <rsbultje@gmail.com>
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 #ifndef AVUTIL_ATOMIC_GCC_H
22 #define AVUTIL_ATOMIC_GCC_H
28 #define avpriv_atomic_int_get atomic_int_get_gcc
29 static inline int atomic_int_get_gcc(volatile int *ptr)
31 #if HAVE_ATOMIC_COMPARE_EXCHANGE
32 return __atomic_load_n(ptr, __ATOMIC_SEQ_CST);
39 #define avpriv_atomic_int_set atomic_int_set_gcc
40 static inline void atomic_int_set_gcc(volatile int *ptr, int val)
42 #if HAVE_ATOMIC_COMPARE_EXCHANGE
43 __atomic_store_n(ptr, val, __ATOMIC_SEQ_CST);
50 #define avpriv_atomic_int_add_and_fetch atomic_int_add_and_fetch_gcc
51 static inline int atomic_int_add_and_fetch_gcc(volatile int *ptr, int inc)
53 #if HAVE_ATOMIC_COMPARE_EXCHANGE
54 return __atomic_add_fetch(ptr, inc, __ATOMIC_SEQ_CST);
56 return __sync_add_and_fetch(ptr, inc);
60 #define avpriv_atomic_ptr_cas atomic_ptr_cas_gcc
61 static inline void *atomic_ptr_cas_gcc(void * volatile *ptr,
62 void *oldval, void *newval)
64 #if HAVE_SYNC_VAL_COMPARE_AND_SWAP
65 #ifdef __ARMCC_VERSION
66 // armcc will throw an error if ptr is not an integer type
67 volatile uintptr_t *tmp = (volatile uintptr_t*)ptr;
68 return (void*)__sync_val_compare_and_swap(tmp, oldval, newval);
70 return __sync_val_compare_and_swap(ptr, oldval, newval);
73 __atomic_compare_exchange_n(ptr, &oldval, newval, 0, __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST);
78 #endif /* AVUTIL_ATOMIC_GCC_H */