1/*- 2 * Copyright (c) 2010 Isilon Systems, Inc. 3 * Copyright (c) 2010 iX Systems, Inc. 4 * Copyright (c) 2010 Panasas, Inc. 5 * Copyright (c) 2013, 2014 Mellanox Technologies, Ltd. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice unmodified, this list of conditions, and the following 13 * disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29#ifndef _LINUX_WAIT_H_ 30#define _LINUX_WAIT_H_ 31 32#include <linux/spinlock.h> 33#include <linux/sched.h> 34#include <linux/list.h> 35 36#include <sys/param.h> 37#include <sys/systm.h> 38#include <sys/sleepqueue.h> 39#include <sys/kernel.h> 40#include <sys/proc.h> 41 42struct __wait_queue_head { 43 unsigned int wchan; 44}; 45typedef struct __wait_queue_head wait_queue_head_t; 46 47#define init_waitqueue_head(x) 48 49static inline void 50__wake_up(struct __wait_queue_head *q, int all) 51{ 52 int wakeup_swapper; 53 void *c; 54 55 c = &q->wchan; 56 sleepq_lock(c); 57 if (all) 58 wakeup_swapper = sleepq_broadcast(c, SLEEPQ_SLEEP, 0, 0); 59 else 60 wakeup_swapper = sleepq_signal(c, SLEEPQ_SLEEP, 0, 0); 61 sleepq_release(c); 62 if (wakeup_swapper) 63 kick_proc0(); 64} 65 66#define wake_up(q) __wake_up(q, 0) 67#define wake_up_nr(q, nr) __wake_up(q, 1) 68#define wake_up_all(q) __wake_up(q, 1) 69#define wake_up_interruptible(q) __wake_up(q, 0) 70#define wake_up_interruptible_nr(q, nr) __wake_up(q, 1) 71#define wake_up_interruptible_all(q, nr) __wake_up(q, 1) 72 73#define wait_event(q, cond) \ 74do { \ 75 void *c = &(q).wchan; \ 76 if (!(cond)) { \ 77 for (;;) { \ 78 sleepq_lock(c); \ 79 if (cond) { \ 80 sleepq_release(c); \ 81 break; \ 82 } \ 83 sleepq_add(c, NULL, "completion", SLEEPQ_SLEEP, 0); \ 84 sleepq_wait(c, 0); \ 85 } \ 86 } \ 87} while (0) 88 89#define wait_event_interruptible(q, cond) \ 90({ \ 91 void *c = &(q).wchan; \ 92 int _error; \ 93 \ 94 _error = 0; \ 95 if (!(cond)) { \ 96 for (; _error == 0;) { \ 97 sleepq_lock(c); \ 98 if (cond) { \ 99 sleepq_release(c); \ 100 break; \ 101 } \ 102 sleepq_add(c, NULL, "completion", \ 103 SLEEPQ_SLEEP | SLEEPQ_INTERRUPTIBLE, 0); \ 104 if (sleepq_wait_sig(c, 0)) \ 105 _error = -ERESTARTSYS; \ 106 } \ 107 } \ 108 -_error; \ 109}) 110 111#define DEFINE_WAIT(x) 112 113#endif /* _LINUX_WAIT_H_ */ 114