blob: 2bb43c3cea0e83016c71587d6254fe4d1620e760
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 */ |
62 |