| 1 | /*
|
|---|
| 2 | * Copyright (C) 2001-2004 Jakub Jermar
|
|---|
| 3 | * All rights reserved.
|
|---|
| 4 | *
|
|---|
| 5 | * Redistribution and use in source and binary forms, with or without
|
|---|
| 6 | * modification, are permitted provided that the following conditions
|
|---|
| 7 | * are met:
|
|---|
| 8 | *
|
|---|
| 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.
|
|---|
| 16 | *
|
|---|
| 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.
|
|---|
| 27 | */
|
|---|
| 28 |
|
|---|
| 29 | #ifndef __WAITQ_H__
|
|---|
| 30 | #define __WAITQ_H__
|
|---|
| 31 |
|
|---|
| 32 | #include <arch/types.h>
|
|---|
| 33 | #include <typedefs.h>
|
|---|
| 34 | #include <synch/spinlock.h>
|
|---|
| 35 | #include <synch/synch.h>
|
|---|
| 36 | #include <list.h>
|
|---|
| 37 |
|
|---|
| 38 | #define WAKEUP_FIRST 0
|
|---|
| 39 | #define WAKEUP_ALL 1
|
|---|
| 40 |
|
|---|
| 41 | /** Wait queue structure. */
|
|---|
| 42 | struct waitq {
|
|---|
| 43 |
|
|---|
| 44 | /** Lock protecting wait queue structure.
|
|---|
| 45 | *
|
|---|
| 46 | * Must be acquired before T.lock for each T of type thread_t.
|
|---|
| 47 | */
|
|---|
| 48 | spinlock_t lock;
|
|---|
| 49 |
|
|---|
| 50 | int missed_wakeups; /**< Number of waitq_wakeup() calls that didn't find a thread to wake up. */
|
|---|
| 51 | link_t head; /**< List of sleeping threads for wich there was no missed_wakeup. */
|
|---|
| 52 | };
|
|---|
| 53 |
|
|---|
| 54 | #define waitq_sleep(wq) \
|
|---|
| 55 | waitq_sleep_timeout((wq),SYNCH_NO_TIMEOUT,SYNCH_BLOCKING)
|
|---|
| 56 |
|
|---|
| 57 | extern void waitq_interrupted_sleep(void *data);
|
|---|
| 58 |
|
|---|
| 59 | extern void waitq_initialize(waitq_t *wq);
|
|---|
| 60 | extern int waitq_sleep_timeout(waitq_t *wq, __u32 usec, int nonblocking);
|
|---|
| 61 | extern void waitq_wakeup(waitq_t *wq, bool all);
|
|---|
| 62 | extern void _waitq_wakeup_unsafe(waitq_t *wq, bool all);
|
|---|
| 63 |
|
|---|
| 64 | #endif
|
|---|
