84e8b7f0c1c40d66c4798c239ec3952e30865a0f
[libav.git] / libavutil / atomic_win32.h
1 /*
2 * Copyright (c) 2012 Ronald S. Bultje <rsbultje@gmail.com>
3 *
4 * This file is part of Libav.
5 *
6 * Libav 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 * Libav 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 Libav; 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_WIN32_H
22 #define AVUTIL_ATOMIC_WIN32_H
23
24 #include <windows.h>
25
26 #include "atomic.h"
27
28 #define avpriv_atomic_int_get atomic_int_get_win32
29 static inline int atomic_int_get_win32(volatile int *ptr)
30 {
31 MemoryBarrier();
32 return *ptr;
33 }
34
35 #define avpriv_atomic_int_set atomic_int_set_win32
36 static inline void atomic_int_set_win32(volatile int *ptr, int val)
37 {
38 *ptr = val;
39 MemoryBarrier();
40 }
41
42 #define avpriv_atomic_int_add_and_fetch atomic_int_add_and_fetch_win32
43 static inline int atomic_int_add_and_fetch_win32(volatile int *ptr, int inc)
44 {
45 return inc + InterlockedExchangeAdd(ptr, inc);
46 }
47
48 #define avpriv_atomic_ptr_cas atomic_ptr_cas_win32
49 static inline void *atomic_ptr_cas_win32(void * volatile *ptr,
50 void *oldval, void *newval)
51 {
52 return InterlockedCompareExchangePointer(ptr, newval, oldval);
53 }
54
55 #endif /* AVUTIL_ATOMIC_WIN32_H */