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1 | /* |
2 | * Copyright (c) 2012 Ronald S. Bultje <rsbultje@gmail.com> | |
3 | * | |
4 | * This file is part of FFmpeg. | |
5 | * | |
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. | |
10 | * | |
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. | |
15 | * | |
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 | |
19 | */ | |
20 | ||
21 | #ifndef AVUTIL_ATOMIC_GCC_H | |
22 | #define AVUTIL_ATOMIC_GCC_H | |
23 | ||
24 | #include <stdint.h> | |
25 | ||
26 | #include "atomic.h" | |
27 | ||
28 | #define avpriv_atomic_int_get atomic_int_get_gcc | |
29 | static inline int atomic_int_get_gcc(volatile int *ptr) | |
30 | { | |
31 | __sync_synchronize(); | |
32 | return *ptr; | |
33 | } | |
34 | ||
35 | #define avpriv_atomic_int_set atomic_int_set_gcc | |
36 | static inline void atomic_int_set_gcc(volatile int *ptr, int val) | |
37 | { | |
38 | *ptr = val; | |
39 | __sync_synchronize(); | |
40 | } | |
41 | ||
42 | #define avpriv_atomic_int_add_and_fetch atomic_int_add_and_fetch_gcc | |
43 | static inline int atomic_int_add_and_fetch_gcc(volatile int *ptr, int inc) | |
44 | { | |
45 | return __sync_add_and_fetch(ptr, inc); | |
46 | } | |
47 | ||
48 | #define avpriv_atomic_ptr_cas atomic_ptr_cas_gcc | |
49 | static inline void *atomic_ptr_cas_gcc(void * volatile *ptr, | |
50 | void *oldval, void *newval) | |
51 | { | |
52 | #ifdef __ARMCC_VERSION | |
53 | // armcc will throw an error if ptr is not an integer type | |
54 | volatile uintptr_t *tmp = (volatile uintptr_t*)ptr; | |
55 | return (void*)__sync_val_compare_and_swap(tmp, oldval, newval); | |
56 | #else | |
57 | return __sync_val_compare_and_swap(ptr, oldval, newval); | |
58 | #endif | |
59 | } | |
60 | ||
61 | #endif /* AVUTIL_ATOMIC_GCC_H */ |