blob: 719cfcddd4b154efad48e23648c4307003470dec [file] [log] [blame]
aliguorie5d355d2009-04-24 18:03:15 +00001/*
2 * Wrappers around mutex/cond/thread functions
3 *
4 * Copyright Red Hat, Inc. 2009
5 *
6 * Author:
7 * Marcelo Tosatti <mtosatti@redhat.com>
8 *
9 * This work is licensed under the terms of the GNU GPL, version 2 or later.
10 * See the COPYING file in the top-level directory.
11 *
12 */
13#include <stdlib.h>
14#include <stdio.h>
15#include <errno.h>
16#include <time.h>
17#include <signal.h>
18#include <stdint.h>
19#include <string.h>
20#include "qemu-thread.h"
21
22static void error_exit(int err, const char *msg)
23{
24 fprintf(stderr, "qemu: %s: %s\n", msg, strerror(err));
25 exit(1);
26}
27
28void qemu_mutex_init(QemuMutex *mutex)
29{
30 int err;
31
32 err = pthread_mutex_init(&mutex->lock, NULL);
33 if (err)
34 error_exit(err, __func__);
35}
36
37void qemu_mutex_lock(QemuMutex *mutex)
38{
39 int err;
40
41 err = pthread_mutex_lock(&mutex->lock);
42 if (err)
43 error_exit(err, __func__);
44}
45
46int qemu_mutex_trylock(QemuMutex *mutex)
47{
48 return pthread_mutex_trylock(&mutex->lock);
49}
50
51static void timespec_add_ms(struct timespec *ts, uint64_t msecs)
52{
53 ts->tv_sec = ts->tv_sec + (long)(msecs / 1000);
54 ts->tv_nsec = (ts->tv_nsec + ((long)msecs % 1000) * 1000000);
55 if (ts->tv_nsec >= 1000000000) {
56 ts->tv_nsec -= 1000000000;
57 ts->tv_sec++;
58 }
59}
60
61int qemu_mutex_timedlock(QemuMutex *mutex, uint64_t msecs)
62{
63 int err;
64 struct timespec ts;
65
66 clock_gettime(CLOCK_REALTIME, &ts);
67 timespec_add_ms(&ts, msecs);
68
69 err = pthread_mutex_timedlock(&mutex->lock, &ts);
70 if (err && err != ETIMEDOUT)
71 error_exit(err, __func__);
72 return err;
73}
74
75void qemu_mutex_unlock(QemuMutex *mutex)
76{
77 int err;
78
79 err = pthread_mutex_unlock(&mutex->lock);
80 if (err)
81 error_exit(err, __func__);
82}
83
84void qemu_cond_init(QemuCond *cond)
85{
86 int err;
87
88 err = pthread_cond_init(&cond->cond, NULL);
89 if (err)
90 error_exit(err, __func__);
91}
92
93void qemu_cond_signal(QemuCond *cond)
94{
95 int err;
96
97 err = pthread_cond_signal(&cond->cond);
98 if (err)
99 error_exit(err, __func__);
100}
101
102void qemu_cond_broadcast(QemuCond *cond)
103{
104 int err;
105
106 err = pthread_cond_broadcast(&cond->cond);
107 if (err)
108 error_exit(err, __func__);
109}
110
111void qemu_cond_wait(QemuCond *cond, QemuMutex *mutex)
112{
113 int err;
114
115 err = pthread_cond_wait(&cond->cond, &mutex->lock);
116 if (err)
117 error_exit(err, __func__);
118}
119
120int qemu_cond_timedwait(QemuCond *cond, QemuMutex *mutex, uint64_t msecs)
121{
122 struct timespec ts;
123 int err;
124
125 clock_gettime(CLOCK_REALTIME, &ts);
126 timespec_add_ms(&ts, msecs);
127
128 err = pthread_cond_timedwait(&cond->cond, &mutex->lock, &ts);
129 if (err && err != ETIMEDOUT)
130 error_exit(err, __func__);
131 return err;
132}
133
134void qemu_thread_create(QemuThread *thread,
135 void *(*start_routine)(void*),
136 void *arg)
137{
138 int err;
139
140 err = pthread_create(&thread->thread, NULL, start_routine, arg);
141 if (err)
142 error_exit(err, __func__);
143}
144
145void qemu_thread_signal(QemuThread *thread, int sig)
146{
147 int err;
148
149 err = pthread_kill(thread->thread, sig);
150 if (err)
151 error_exit(err, __func__);
152}
153
154void qemu_thread_self(QemuThread *thread)
155{
156 thread->thread = pthread_self();
157}
158
159int qemu_thread_equal(QemuThread *thread1, QemuThread *thread2)
160{
161 return (thread1->thread == thread2->thread);
162}
163