1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2000 Jake Burkholder <jake@freebsd.org>.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD: releng/12.2/sys/kern/kern_condvar.c 326271 2017-11-27 15:20:12Z pfg $");
31
32 #include <sys/condvar.h>
33 #include <sys/callout.h>
34 #include <time.h>
35 #include <los_event.h>
36
37 extern UINT32 OsEventWriteOnce(EVENT_CB_S *eventCb, UINT32 events);
38
39 int
cv_timedwait(struct cv * cv,struct mtx * mtx,int tw_ms)40 cv_timedwait(struct cv *cv, struct mtx *mtx, int tw_ms)
41 {
42 struct timespec abstime;
43
44 abstime.tv_sec = tw_ms / MSEC_PER_SEC;
45 abstime.tv_nsec = (tw_ms%MSEC_PER_SEC) * NSEC_PER_MSEC;
46 return (pthread_cond_timedwait(cv, mtx, &abstime));
47 }
48
49 int
cv_signal(pthread_cond_t * cond)50 cv_signal(pthread_cond_t *cond)
51 {
52 int ret;
53
54 if (cond == NULL) {
55 return (EINVAL);
56 }
57 ret = OsEventWriteOnce(&(cond->event), 0x01);
58
59 if (ret != 0) {
60 return (EINVAL);
61 }
62
63 return (ret);
64 }
65
66 int
cv_wait(pthread_cond_t * cond,pthread_mutex_t * mutex)67 cv_wait(pthread_cond_t *cond, pthread_mutex_t *mutex)
68 {
69 int ret;
70
71 if ((cond == NULL) || (mutex == NULL)) {
72 return (EINVAL);
73 }
74
75 (void)pthread_mutex_lock(cond->mutex);
76 if (cond->value == -1) {
77 cond->value = 0;
78 ret = LOS_EventInit(&(cond->event));
79 if (ret != LOS_OK) {
80 (void)pthread_mutex_unlock(cond->mutex);
81 return (EINVAL);
82 }
83 }
84 (void)pthread_mutex_unlock(cond->mutex);
85
86 if (pthread_mutex_unlock(mutex) != ENOERR) {
87 PRINTK("%s %d\n",__FUNCTION__,__LINE__);
88 }
89
90 ret = LOS_EventRead(&(cond->event), 0x0f, LOS_WAITMODE_OR | LOS_WAITMODE_CLR, LOS_WAIT_FOREVER);
91
92 if (pthread_mutex_lock(mutex) != ENOERR) {
93 PRINTK("%s %d\n",__FUNCTION__,__LINE__);
94 }
95
96 return (ret);
97 }
98
99 int
cv_broadcast(pthread_cond_t * cond)100 cv_broadcast(pthread_cond_t *cond)
101 {
102 int ret;
103
104 if (cond == NULL) {
105 return (EINVAL);
106 }
107
108 ret = LOS_EventWrite(&(cond->event), 0x01);
109 if (ret != 0) {
110 return (EINVAL);
111 }
112
113 return (ret);
114 }
115