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2ba45a60 DM |
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 | { | |
f6fa7814 DM |
31 | #if HAVE_ATOMIC_COMPARE_EXCHANGE |
32 | return __atomic_load_n(ptr, __ATOMIC_SEQ_CST); | |
33 | #else | |
2ba45a60 DM |
34 | __sync_synchronize(); |
35 | return *ptr; | |
f6fa7814 | 36 | #endif |
2ba45a60 DM |
37 | } |
38 | ||
39 | #define avpriv_atomic_int_set atomic_int_set_gcc | |
40 | static inline void atomic_int_set_gcc(volatile int *ptr, int val) | |
41 | { | |
f6fa7814 DM |
42 | #if HAVE_ATOMIC_COMPARE_EXCHANGE |
43 | __atomic_store_n(ptr, val, __ATOMIC_SEQ_CST); | |
44 | #else | |
2ba45a60 DM |
45 | *ptr = val; |
46 | __sync_synchronize(); | |
f6fa7814 | 47 | #endif |
2ba45a60 DM |
48 | } |
49 | ||
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) | |
52 | { | |
f6fa7814 DM |
53 | #if HAVE_ATOMIC_COMPARE_EXCHANGE |
54 | return __atomic_add_fetch(ptr, inc, __ATOMIC_SEQ_CST); | |
55 | #else | |
2ba45a60 | 56 | return __sync_add_and_fetch(ptr, inc); |
f6fa7814 | 57 | #endif |
2ba45a60 DM |
58 | } |
59 | ||
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) | |
63 | { | |
f6fa7814 | 64 | #if HAVE_SYNC_VAL_COMPARE_AND_SWAP |
2ba45a60 DM |
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); | |
69 | #else | |
70 | return __sync_val_compare_and_swap(ptr, oldval, newval); | |
71 | #endif | |
f6fa7814 DM |
72 | #else |
73 | __atomic_compare_exchange_n(ptr, &oldval, newval, 0, __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST); | |
74 | return oldval; | |
75 | #endif | |
2ba45a60 DM |
76 | } |
77 | ||
78 | #endif /* AVUTIL_ATOMIC_GCC_H */ |