Rev 1 | Rev 404 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1 | jermar | 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 | #include <synch/condvar.h> |
||
| 30 | #include <synch/mutex.h> |
||
| 31 | #include <synch/waitq.h> |
||
| 387 | jermar | 32 | #include <synch/synch.h> |
| 1 | jermar | 33 | |
| 387 | jermar | 34 | /** Initialize condition variable |
| 35 | * |
||
| 36 | * Initialize condition variable. |
||
| 37 | * |
||
| 38 | * @param cv Condition variable. |
||
| 39 | */ |
||
| 1 | jermar | 40 | void condvar_initialize(condvar_t *cv) |
| 41 | { |
||
| 42 | waitq_initialize(&cv->wq); |
||
| 43 | } |
||
| 44 | |||
| 387 | jermar | 45 | /** Signal the condition has become true |
| 46 | * |
||
| 47 | * Signal the condition has become true |
||
| 48 | * to the first waiting thread by waking it up. |
||
| 49 | * |
||
| 50 | * @param Condition variable. |
||
| 51 | */ |
||
| 1 | jermar | 52 | void condvar_signal(condvar_t *cv) |
| 53 | { |
||
| 54 | waitq_wakeup(&cv->wq, WAKEUP_FIRST); |
||
| 55 | } |
||
| 56 | |||
| 387 | jermar | 57 | /** Signal the condition has become true |
| 58 | * |
||
| 59 | * Signal the condition has become true |
||
| 60 | * to all waiting threads by waking them up. |
||
| 61 | * |
||
| 62 | * @param Condition variable. |
||
| 63 | */ |
||
| 1 | jermar | 64 | void condvar_broadcast(condvar_t *cv) |
| 65 | { |
||
| 66 | waitq_wakeup(&cv->wq, WAKEUP_ALL); |
||
| 67 | } |
||
| 68 | |||
| 387 | jermar | 69 | /** Wait for the condition becoming true |
| 70 | * |
||
| 71 | * Wait for the condition becoming true. |
||
| 72 | * |
||
| 73 | * @param Condition variable. |
||
| 74 | */ |
||
| 1 | jermar | 75 | int _condvar_wait_timeout(condvar_t *cv, mutex_t *mtx, __u32 usec, int trywait) |
| 76 | { |
||
| 77 | int rc; |
||
| 78 | |||
| 79 | mutex_unlock(mtx); |
||
| 80 | rc = waitq_sleep_timeout(&cv->wq, usec, trywait); |
||
| 81 | mutex_lock(mtx); |
||
| 82 | return rc; |
||
| 83 | } |