root / qemu-thread-posix.c @ 814589c4
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/*
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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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abort(); |
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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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pthread_mutexattr_t mutexattr; |
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pthread_mutexattr_init(&mutexattr); |
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pthread_mutexattr_settype(&mutexattr, PTHREAD_MUTEX_ERRORCHECK); |
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err = pthread_mutex_init(&mutex->lock, &mutexattr); |
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pthread_mutexattr_destroy(&mutexattr); |
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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_destroy(QemuMutex *mutex)
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{ |
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int err;
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err = pthread_mutex_destroy(&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_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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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_destroy(QemuCond *cond)
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{ |
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int err;
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err = pthread_cond_destroy(&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_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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void qemu_thread_create(QemuThread *thread,
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void *(*start_routine)(void*), |
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void *arg, int mode) |
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{ |
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sigset_t set, oldset; |
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int err;
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pthread_attr_t attr; |
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err = pthread_attr_init(&attr); |
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if (err) {
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error_exit(err, __func__); |
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} |
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if (mode == QEMU_THREAD_DETACHED) {
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err = pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED); |
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if (err) {
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error_exit(err, __func__); |
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} |
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} |
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/* Leave signal handling to the iothread. */
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sigfillset(&set); |
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pthread_sigmask(SIG_SETMASK, &set, &oldset); |
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err = pthread_create(&thread->thread, &attr, start_routine, arg); |
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if (err)
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error_exit(err, __func__); |
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pthread_sigmask(SIG_SETMASK, &oldset, NULL);
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pthread_attr_destroy(&attr); |
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} |
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void qemu_thread_get_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_is_self(QemuThread *thread)
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{ |
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return pthread_equal(pthread_self(), thread->thread);
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} |
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void qemu_thread_exit(void *retval) |
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{ |
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pthread_exit(retval); |
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} |
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void *qemu_thread_join(QemuThread *thread)
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{ |
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int err;
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void *ret;
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err = pthread_join(thread->thread, &ret); |
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if (err) {
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error_exit(err, __func__); |
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} |
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return ret;
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} |