00001 /* 00002 * Copyright (C) 2001-2004 Jakub Jermar 00003 * All rights reserved. 00004 * 00005 * Redistribution and use in source and binary forms, with or without 00006 * modification, are permitted provided that the following conditions 00007 * are met: 00008 * 00009 * - Redistributions of source code must retain the above copyright 00010 * notice, this list of conditions and the following disclaimer. 00011 * - Redistributions in binary form must reproduce the above copyright 00012 * notice, this list of conditions and the following disclaimer in the 00013 * documentation and/or other materials provided with the distribution. 00014 * - The name of the author may not be used to endorse or promote products 00015 * derived from this software without specific prior written permission. 00016 * 00017 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 00018 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 00019 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 00020 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 00021 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 00022 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 00023 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 00024 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 00025 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 00026 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 00027 */ 00028 00035 #ifndef __WAITQ_H__ 00036 #define __WAITQ_H__ 00037 00038 #include <arch/types.h> 00039 #include <typedefs.h> 00040 #include <synch/spinlock.h> 00041 #include <synch/synch.h> 00042 #include <adt/list.h> 00043 00044 #define WAKEUP_FIRST 0 00045 #define WAKEUP_ALL 1 00046 00048 struct waitq { 00049 00054 SPINLOCK_DECLARE(lock); 00055 00056 int missed_wakeups; 00057 link_t head; 00058 }; 00059 00060 #define waitq_sleep(wq) \ 00061 waitq_sleep_timeout((wq),SYNCH_NO_TIMEOUT,SYNCH_FLAGS_NONE) 00062 00063 extern void waitq_initialize(waitq_t *wq); 00064 extern int waitq_sleep_timeout(waitq_t *wq, __u32 usec, int flags); 00065 extern ipl_t waitq_sleep_prepare(waitq_t *wq); 00066 extern int waitq_sleep_timeout_unsafe(waitq_t *wq, __u32 usec, int flags); 00067 extern void waitq_sleep_finish(waitq_t *wq, int rc, ipl_t ipl); 00068 extern void waitq_wakeup(waitq_t *wq, bool all); 00069 extern void _waitq_wakeup_unsafe(waitq_t *wq, bool all); 00070 extern void waitq_interrupt_sleep(thread_t *t); 00071 00072 #endif 00073