1 /*
2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
3 *
4 * Copyright 2024 Olaf Wintermann. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 *
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 COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17 * AND 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 COPYRIGHT HOLDER OR CONTRIBUTORS BE
20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 #include "condvar.h"
30
31 #include <stdlib.h>
32
33 UiCondVar* ui_condvar_create(void) {
34 UiPosixCondVar *var = malloc(sizeof(UiPosixCondVar));
35 var->var.data = NULL;
36 var->var.intdata = 0;
37 var->set = 0;
38 pthread_mutex_init(&var->lock, NULL);
39 pthread_cond_init(&var->cond, NULL);
40 return (UiCondVar*)var;
41 }
42
43 void ui_condvar_wait(UiCondVar *var) {
44 UiPosixCondVar *p = (UiPosixCondVar*)var;
45 pthread_mutex_lock(&p->lock);
46 if(!p->set) {
47 pthread_cond_wait(&p->cond, &p->lock);
48 }
49 p->set = 0;
50 pthread_mutex_unlock(&p->lock);
51
52 }
53
54 void ui_condvar_signal(UiCondVar *var, void *data, int intdata) {
55 UiPosixCondVar *p = (UiPosixCondVar*)var;
56 pthread_mutex_lock(&p->lock);
57 p->var.data = data;
58 p->var.intdata = intdata;
59 p->set = 1;
60 pthread_cond_signal(&p->cond);
61 pthread_mutex_unlock(&p->lock);
62 }
63
64 void ui_condvar_destroy(UiCondVar *var) {
65 UiPosixCondVar *p = (UiPosixCondVar*)var;
66 pthread_mutex_destroy(&p->lock);
67 pthread_cond_destroy(&p->cond);
68 free(p);
69
70 }
71