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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 @@ +/*************************************************************************** + * __________ __ ___. + * Open \______ \ ____ ____ | | _\_ |__ _______ ___ + * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / + * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < + * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ + * \/ \/ \/ \/ \/ + * $Id$ + * + * Copyright (C) 2002 by Björn Stenberg + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY + * KIND, either express or implied. + * + ****************************************************************************/ + +#ifndef SEMAPHORE_H +#define SEMAPHORE_H + +#include "config.h" +#include "thread.h" + +struct semaphore +{ + struct thread_entry *queue; /* Waiter list */ + int volatile count; /* # of waits remaining before unsignaled */ + int max; /* maximum # of waits to remain signaled */ + IF_COP( struct corelock cl; ) /* multiprocessor sync */ +}; + +extern void semaphore_init(struct semaphore *s, int max, int start); +extern int semaphore_wait(struct semaphore *s, int timeout); +extern void semaphore_release(struct semaphore *s); + +#endif /* SEMAPHORE_H */ |