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Diffstat (limited to 'firmware/kernel/include/semaphore.h')
-rw-r--r-- | firmware/kernel/include/semaphore.h | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/firmware/kernel/include/semaphore.h b/firmware/kernel/include/semaphore.h new file mode 100644 index 0000000000..40e60bb88d --- /dev/null +++ b/firmware/kernel/include/semaphore.h | |||
@@ -0,0 +1,40 @@ | |||
1 | /*************************************************************************** | ||
2 | * __________ __ ___. | ||
3 | * Open \______ \ ____ ____ | | _\_ |__ _______ ___ | ||
4 | * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / | ||
5 | * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < | ||
6 | * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ | ||
7 | * \/ \/ \/ \/ \/ | ||
8 | * $Id$ | ||
9 | * | ||
10 | * Copyright (C) 2002 by Björn Stenberg | ||
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 | #ifndef SEMAPHORE_H | ||
23 | #define SEMAPHORE_H | ||
24 | |||
25 | #include "config.h" | ||
26 | #include "thread.h" | ||
27 | |||
28 | struct semaphore | ||
29 | { | ||
30 | struct thread_entry *queue; /* Waiter list */ | ||
31 | int volatile count; /* # of waits remaining before unsignaled */ | ||
32 | int max; /* maximum # of waits to remain signaled */ | ||
33 | IF_COP( struct corelock cl; ) /* multiprocessor sync */ | ||
34 | }; | ||
35 | |||
36 | extern void semaphore_init(struct semaphore *s, int max, int start); | ||
37 | extern int semaphore_wait(struct semaphore *s, int timeout); | ||
38 | extern void semaphore_release(struct semaphore *s); | ||
39 | |||
40 | #endif /* SEMAPHORE_H */ | ||