1 /*****************************************************************************
3 *****************************************************************************
4 * Copyright (C) 2010 RĂ©mi Denis-Courmont
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program 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
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
19 *****************************************************************************/
26 * Atomic operations do not require locking, but they are not very powerful.
29 /* All functions return the atom value _after_ the operation. */
31 VLC_EXPORT(uintptr_t, vlc_atomic_get
, (const vlc_atomic_t
*));
32 VLC_EXPORT(uintptr_t, vlc_atomic_set
, (vlc_atomic_t
*, uintptr_t));
33 VLC_EXPORT(uintptr_t, vlc_atomic_add
, (vlc_atomic_t
*, uintptr_t));
35 static inline uintptr_t vlc_atomic_sub (vlc_atomic_t
*atom
, uintptr_t v
)
37 return vlc_atomic_add (atom
, -v
);
40 static inline uintptr_t vlc_atomic_inc (vlc_atomic_t
*atom
)
42 return vlc_atomic_add (atom
, 1);
45 static inline uintptr_t vlc_atomic_dec (vlc_atomic_t
*atom
)
47 return vlc_atomic_sub (atom
, 1);
50 VLC_EXPORT(uintptr_t, vlc_atomic_swap
, (vlc_atomic_t
*, uintptr_t));
51 VLC_EXPORT(uintptr_t, vlc_atomic_compare_swap
, (vlc_atomic_t
*, uintptr_t, uintptr_t));