source: trunk/kernel/kern/cond_var.h @ 1

Last change on this file since 1 was 1, checked in by alain, 4 years ago

First import

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1/*
2 * kern/cond_var.h - condition variables interface
3 *
4 * Copyright (c) 2008,2009,2010,2011,2012 Ghassan Almaless
5 * Copyright (c) 2011,2012 UPMC Sorbonne Universites
6 *
7 * This file is part of ALMOS-kernel.
8 *
9 * ALMOS-kernel is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; version 2.0 of the License.
12 *
13 * ALMOS-kernel is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16 * General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with ALMOS-kernel; if not, write to the Free Software Foundation,
20 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22
23#ifndef _COND_VAR_H_
24#define _COND_VAR_H_
25
26#include <types.h>
27#include <spinlock.h>
28#include <wait_queue.h>
29
30typedef enum
31{
32        CV_INIT,
33        CV_WAIT,
34        CV_SIGNAL,
35        CV_BROADCAST,
36        CV_DESTROY
37} cv_operation_t;
38
39struct cv_s
40{
41        spinlock_t lock;
42        uint_t signature;
43        struct wait_queue_s wait_queue;
44};
45
46struct semaphore_s;
47
48error_t cv_init(struct cv_s *cv);
49error_t cv_wait(struct cv_s *cv, struct semaphore_s *sem);
50error_t cv_signal(struct cv_s *cv);
51error_t cv_broadcast(struct cv_s *cv);
52error_t cv_destroy(struct cv_s *cv);
53
54int sys_cond_var(struct cv_s **cv, uint_t operation, struct semaphore_s **sem);
55
56KMEM_OBJATTR_INIT(cv_kmem_init);
57
58#endif  /* _COND_VAR_H_ */
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