Merge as_t structure into one and leave the differring parts in as_genarch_t.
[helenos.git] / kernel / generic / include / synch / semaphore.h
blob21ae71849e8eb843d588c71dd21b06ba8c129d64
1 /*
2 * Copyright (c) 2001-2004 Jakub Jermar
3 * All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * - The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 /** @addtogroup sync
30 * @{
32 /** @file
35 #ifndef KERN_SEMAPHORE_H_
36 #define KERN_SEMAPHORE_H_
38 #include <arch/types.h>
39 #include <synch/waitq.h>
40 #include <synch/synch.h>
42 typedef struct {
43 waitq_t wq;
44 } semaphore_t;
46 #define semaphore_down(s) \
47 _semaphore_down_timeout((s), SYNCH_NO_TIMEOUT, SYNCH_FLAGS_NONE)
48 #define semaphore_trydown(s) \
49 _semaphore_down_timeout((s), SYNCH_NO_TIMEOUT, SYNCH_FLAGS_NON_BLOCKING)
50 #define semaphore_down_timeout(s, usec) \
51 _semaphore_down_timeout((s), (usec), SYNCH_FLAGS_NONE)
53 extern void semaphore_initialize(semaphore_t *s, int val);
54 extern int _semaphore_down_timeout(semaphore_t *s, uint32_t usec, int flags);
55 extern void semaphore_up(semaphore_t *s);
57 #endif
59 /** @}