164 lines
3.3 KiB
C
164 lines
3.3 KiB
C
/*
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* Wrappers around mutex/cond/thread functions
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*
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* Copyright Red Hat, Inc. 2009
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*
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* Author:
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* Marcelo Tosatti <mtosatti@redhat.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <errno.h>
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#include <time.h>
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#include <signal.h>
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#include <stdint.h>
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#include <string.h>
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#include "qemu-thread.h"
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static void error_exit(int err, const char *msg)
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{
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fprintf(stderr, "qemu: %s: %s\n", msg, strerror(err));
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exit(1);
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}
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void qemu_mutex_init(QemuMutex *mutex)
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{
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int err;
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err = pthread_mutex_init(&mutex->lock, NULL);
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if (err)
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error_exit(err, __func__);
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}
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void qemu_mutex_lock(QemuMutex *mutex)
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{
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int err;
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err = pthread_mutex_lock(&mutex->lock);
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if (err)
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error_exit(err, __func__);
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}
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int qemu_mutex_trylock(QemuMutex *mutex)
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{
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return pthread_mutex_trylock(&mutex->lock);
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}
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static void timespec_add_ms(struct timespec *ts, uint64_t msecs)
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{
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ts->tv_sec = ts->tv_sec + (long)(msecs / 1000);
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ts->tv_nsec = (ts->tv_nsec + ((long)msecs % 1000) * 1000000);
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if (ts->tv_nsec >= 1000000000) {
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ts->tv_nsec -= 1000000000;
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ts->tv_sec++;
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}
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}
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int qemu_mutex_timedlock(QemuMutex *mutex, uint64_t msecs)
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{
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int err;
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struct timespec ts;
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clock_gettime(CLOCK_REALTIME, &ts);
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timespec_add_ms(&ts, msecs);
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err = pthread_mutex_timedlock(&mutex->lock, &ts);
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if (err && err != ETIMEDOUT)
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error_exit(err, __func__);
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return err;
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}
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void qemu_mutex_unlock(QemuMutex *mutex)
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{
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int err;
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err = pthread_mutex_unlock(&mutex->lock);
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if (err)
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error_exit(err, __func__);
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}
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void qemu_cond_init(QemuCond *cond)
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{
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int err;
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err = pthread_cond_init(&cond->cond, NULL);
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if (err)
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error_exit(err, __func__);
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}
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void qemu_cond_signal(QemuCond *cond)
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{
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int err;
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err = pthread_cond_signal(&cond->cond);
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if (err)
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error_exit(err, __func__);
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}
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void qemu_cond_broadcast(QemuCond *cond)
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{
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int err;
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err = pthread_cond_broadcast(&cond->cond);
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if (err)
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error_exit(err, __func__);
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}
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void qemu_cond_wait(QemuCond *cond, QemuMutex *mutex)
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{
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int err;
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err = pthread_cond_wait(&cond->cond, &mutex->lock);
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if (err)
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error_exit(err, __func__);
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}
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int qemu_cond_timedwait(QemuCond *cond, QemuMutex *mutex, uint64_t msecs)
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{
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struct timespec ts;
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int err;
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clock_gettime(CLOCK_REALTIME, &ts);
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timespec_add_ms(&ts, msecs);
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err = pthread_cond_timedwait(&cond->cond, &mutex->lock, &ts);
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if (err && err != ETIMEDOUT)
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error_exit(err, __func__);
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return err;
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}
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void qemu_thread_create(QemuThread *thread,
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void *(*start_routine)(void*),
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void *arg)
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{
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int err;
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err = pthread_create(&thread->thread, NULL, start_routine, arg);
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if (err)
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error_exit(err, __func__);
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}
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void qemu_thread_signal(QemuThread *thread, int sig)
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{
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int err;
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err = pthread_kill(thread->thread, sig);
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if (err)
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error_exit(err, __func__);
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}
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void qemu_thread_self(QemuThread *thread)
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{
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thread->thread = pthread_self();
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}
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int qemu_thread_equal(QemuThread *thread1, QemuThread *thread2)
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{
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return pthread_equal(thread1->thread, thread2->thread);
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}
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