WebSVN – HelenOS-historic – Diff – /kernel/trunk/generic/include/synch/waitq.h


/*
 * Copyright (C) 2001-2004 Jakub Jermar
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
 /** @addtogroup sync
 * @{
 */
/** @file
 */
 
#ifndef __WAITQ_H__
#define __WAITQ_H__
 
#include <arch/types.h>
#include <typedefs.h>
#include <synch/spinlock.h>
#include <synch/synch.h>
#include <adt/list.h>
 
#define WAKEUP_FIRST    0
#define WAKEUP_ALL  1
 
/** Wait queue structure. */
struct waitq {
 
    /** Lock protecting wait queue structure.
     *
     * Must be acquired before T.lock for each T of type thread_t.
     */
    SPINLOCK_DECLARE(lock);
 
    int missed_wakeups; /**< Number of waitq_wakeup() calls that didn't find a thread to wake up. */
    link_t head;        /**< List of sleeping threads for wich there was no missed_wakeup. */
};
 
#define waitq_sleep(wq) \
    waitq_sleep_timeout((wq),SYNCH_NO_TIMEOUT,SYNCH_FLAGS_NONE)
 
extern void waitq_initialize(waitq_t *wq);
extern int waitq_sleep_timeout(waitq_t *wq, uint32_t usec, int flags);
extern ipl_t waitq_sleep_prepare(waitq_t *wq);
extern int waitq_sleep_timeout_unsafe(waitq_t *wq, uint32_t usec, int flags);
extern void waitq_sleep_finish(waitq_t *wq, int rc, ipl_t ipl);
extern void waitq_wakeup(waitq_t *wq, bool all);
extern void _waitq_wakeup_unsafe(waitq_t *wq, bool all);
extern void waitq_interrupt_sleep(thread_t *t);
 
#endif
 
 /** @}
 */
 
 

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/generic/include/synch/waitq.h – Rev 1702 → 1780

Rev 1702		Rev 1780
1	/*	1	/*
2	* Copyright (C) 2001-2004 Jakub Jermar	2	* Copyright (C) 2001-2004 Jakub Jermar
3	* All rights reserved.	3	* All rights reserved.
4	*	4	*
5	* Redistribution and use in source and binary forms, with or without	5	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions	6	* modification, are permitted provided that the following conditions
7	* are met:	7	* are met:
8	*	8	*
9	* - Redistributions of source code must retain the above copyright	9	* - Redistributions of source code must retain the above copyright
10	* notice, this list of conditions and the following disclaimer.	10	* notice, this list of conditions and the following disclaimer.
11	* - Redistributions in binary form must reproduce the above copyright	11	* - Redistributions in binary form must reproduce the above copyright
12	* notice, this list of conditions and the following disclaimer in the	12	* notice, this list of conditions and the following disclaimer in the
13	* documentation and/or other materials provided with the distribution.	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	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.	15	* derived from this software without specific prior written permission.
16	*	16	*
17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	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	18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	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	23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	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	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.	26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27	*/	27	*/
28		28
29	/** @addtogroup sync	29	/** @addtogroup sync
30	* @{	30	* @{
31	*/	31	*/
32	/** @file	32	/** @file
33	*/	33	*/
34		34
35	#ifndef __WAITQ_H__	35	#ifndef __WAITQ_H__
36	#define __WAITQ_H__	36	#define __WAITQ_H__
37		37
38	#include <arch/types.h>	38	#include <arch/types.h>
39	#include <typedefs.h>	39	#include <typedefs.h>
40	#include <synch/spinlock.h>	40	#include <synch/spinlock.h>
41	#include <synch/synch.h>	41	#include <synch/synch.h>
42	#include <adt/list.h>	42	#include <adt/list.h>
43		43
44	#define WAKEUP_FIRST 0	44	#define WAKEUP_FIRST 0
45	#define WAKEUP_ALL 1	45	#define WAKEUP_ALL 1
46		46
47	/** Wait queue structure. */	47	/** Wait queue structure. */
48	struct waitq {	48	struct waitq {
49		49
50	/** Lock protecting wait queue structure.	50	/** Lock protecting wait queue structure.
51	*	51	*
52	* Must be acquired before T.lock for each T of type thread_t.	52	* Must be acquired before T.lock for each T of type thread_t.
53	*/	53	*/
54	SPINLOCK_DECLARE(lock);	54	SPINLOCK_DECLARE(lock);
55		55
56	int missed_wakeups; /*< Number of waitq_wakeup() calls that didn't find a thread to wake up. /	56	int missed_wakeups; /*< Number of waitq_wakeup() calls that didn't find a thread to wake up. /
57	link_t head; /*< List of sleeping threads for wich there was no missed_wakeup. /	57	link_t head; /*< List of sleeping threads for wich there was no missed_wakeup. /
58	};	58	};
59		59
60	#define waitq_sleep(wq) \	60	#define waitq_sleep(wq) \
61	waitq_sleep_timeout((wq),SYNCH_NO_TIMEOUT,SYNCH_FLAGS_NONE)	61	waitq_sleep_timeout((wq),SYNCH_NO_TIMEOUT,SYNCH_FLAGS_NONE)
62		62
63	extern void waitq_initialize(waitq_t *wq);	63	extern void waitq_initialize(waitq_t *wq);
64	extern int waitq_sleep_timeout(waitq_t *wq, __u32 usec, int flags);	64	extern int waitq_sleep_timeout(waitq_t *wq, uint32_t usec, int flags);
65	extern ipl_t waitq_sleep_prepare(waitq_t *wq);	65	extern ipl_t waitq_sleep_prepare(waitq_t *wq);
66	extern int waitq_sleep_timeout_unsafe(waitq_t *wq, __u32 usec, int flags);	66	extern int waitq_sleep_timeout_unsafe(waitq_t *wq, uint32_t usec, int flags);
67	extern void waitq_sleep_finish(waitq_t *wq, int rc, ipl_t ipl);	67	extern void waitq_sleep_finish(waitq_t *wq, int rc, ipl_t ipl);
68	extern void waitq_wakeup(waitq_t *wq, bool all);	68	extern void waitq_wakeup(waitq_t *wq, bool all);
69	extern void _waitq_wakeup_unsafe(waitq_t *wq, bool all);	69	extern void _waitq_wakeup_unsafe(waitq_t *wq, bool all);
70	extern void waitq_interrupt_sleep(thread_t *t);	70	extern void waitq_interrupt_sleep(thread_t *t);
71		71
72	#endif	72	#endif
73		73
74	/** @}	74	/** @}
75	*/	75	*/
76		76
77		77