summaryrefslogtreecommitdiffstats
path: root/src/mutex.c
blob: 12a4f4acd10e176a6e2f0227dc7a12a4819c32be (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <pthread.h>
#include <errno.h>

#include "macro.h"
#include "malloc.h"
#include "mutex.h"

struct sa_mutex {
    pthread_mutex_t mutex;
};

struct sa_cond {
    pthread_cond_t cond;
};

sa_mutex_t* sa_mutex_new(int recursive) {
    sa_mutex_t *m;
    pthread_mutexattr_t attr;

    pthread_mutexattr_init(&attr);

    if (recursive)
        sa_assert_success(pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE));

    if (!(m = sa_new(sa_mutex_t, 1)))
        return NULL;

    sa_assert_success(pthread_mutex_init(&m->mutex, &attr));
    return m;
}

void sa_mutex_free(sa_mutex_t *m) {
    sa_assert(m);

    sa_assert_success(pthread_mutex_destroy(&m->mutex));
    sa_free(m);
}

void sa_mutex_lock(sa_mutex_t *m) {
    sa_assert(m);

    sa_assert_success(pthread_mutex_lock(&m->mutex));
}

int sa_mutex_try_lock(sa_mutex_t *m) {
    int e;
    sa_assert(m);

    if ((e = pthread_mutex_trylock(&m->mutex)) == 0)
        return 1;

    sa_assert(e == EBUSY);
    return 0;
}

void sa_mutex_unlock(sa_mutex_t *m) {
        sa_assert(m);

    sa_assert_success(pthread_mutex_unlock(&m->mutex));
}

sa_cond_t *sa_cond_new(void) {
    sa_cond_t *c;

    if (!(c = sa_new(sa_cond_t, 1)))
        return NULL;

    sa_assert_success(pthread_cond_init(&c->cond, NULL));
    return c;
}

void sa_cond_free(sa_cond_t *c) {
    sa_assert(c);

    sa_assert_success(pthread_cond_destroy(&c->cond));
    sa_free(c);
}

void sa_cond_signal(sa_cond_t *c, int broadcast) {
    sa_assert(c);

    if (broadcast)
        sa_assert_success(pthread_cond_broadcast(&c->cond));
    else
        sa_assert_success(pthread_cond_signal(&c->cond));
}

int sa_cond_wait(sa_cond_t *c, sa_mutex_t *m) {
    sa_assert(c);
    sa_assert(m);

    return pthread_cond_wait(&c->cond, &m->mutex);
}