tsiry-sandratraina.com
A modern Music Player Daemon based on Rockbox open source high quality audio player
libadwaita
audio
rust
zig
deno
mpris
rockbox
mpd
1/***************************************************************************
2 * __________ __ ___.
3 * Open \______ \ ____ ____ | | _\_ |__ _______ ___
4 * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
5 * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
6 * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
7 * \/ \/ \/ \/ \/
8 * $Id$
9 *
10 * Copyright (C) 2007 by Daniel Ankers
11 *
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version 2
15 * of the License, or (at your option) any later version.
16 *
17 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
18 * KIND, either express or implied.
19 *
20 ****************************************************************************/
21
22#include "config.h"
23#include "corelock.h"
24/* Core locks using Peterson's mutual exclusion algorithm. */
25
26#ifdef CPU_ARM
27#include "arm/corelock.c"
28#else
29
30void corelock_lock(struct corelock *cl)
31{
32 const unsigned int core = CURRENT_CORE;
33 const unsigned int othercore = 1 - core;
34
35 cl->myl[core] = core;
36 cl->turn = othercore;
37
38 for (;;)
39 {
40 if (cl->myl[othercore] == 0 || cl->turn == core)
41 break;
42 }
43}
44
45int corelock_try_lock(struct corelock *cl)
46{
47 const unsigned int core = CURRENT_CORE;
48 const unsigned int othercore = 1 - core;
49
50 cl->myl[core] = core;
51 cl->turn = othercore;
52
53 if (cl->myl[othercore] == 0 || cl->turn == core)
54 {
55 return 1;
56 }
57
58 cl->myl[core] = 0;
59 return 0;
60}
61
62void corelock_unlock(struct corelock *cl)
63{
64 cl->myl[CURRENT_CORE] = 0;
65}
66
67#endif