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- /*
- * Wrappers around mutex/cond/thread functions
- *
- * Copyright Red Hat, Inc. 2009
- *
- * Author:
- * Marcelo Tosatti <mtosatti@redhat.com>
- *
- * This work is licensed under the terms of the GNU GPL, version 2 or later.
- * See the COPYING file in the top-level directory.
- *
- */
- #include <stdlib.h>
- #include <stdio.h>
- #include <errno.h>
- #include <time.h>
- #include <signal.h>
- #include <stdint.h>
- #include <string.h>
- #include "qemu-thread.h"
- static void error_exit(int err, const char *msg)
- {
- fprintf(stderr, "qemu: %s: %s\n", msg, strerror(err));
- abort();
- }
- void qemu_mutex_init(QemuMutex *mutex)
- {
- int err;
- pthread_mutexattr_t mutexattr;
- pthread_mutexattr_init(&mutexattr);
- pthread_mutexattr_settype(&mutexattr, PTHREAD_MUTEX_ERRORCHECK);
- err = pthread_mutex_init(&mutex->lock, &mutexattr);
- pthread_mutexattr_destroy(&mutexattr);
- if (err)
- error_exit(err, __func__);
- }
- void qemu_mutex_destroy(QemuMutex *mutex)
- {
- int err;
- err = pthread_mutex_destroy(&mutex->lock);
- if (err)
- error_exit(err, __func__);
- }
- void qemu_mutex_lock(QemuMutex *mutex)
- {
- int err;
- err = pthread_mutex_lock(&mutex->lock);
- if (err)
- error_exit(err, __func__);
- }
- int qemu_mutex_trylock(QemuMutex *mutex)
- {
- return pthread_mutex_trylock(&mutex->lock);
- }
- void qemu_mutex_unlock(QemuMutex *mutex)
- {
- int err;
- err = pthread_mutex_unlock(&mutex->lock);
- if (err)
- error_exit(err, __func__);
- }
- void qemu_cond_init(QemuCond *cond)
- {
- int err;
- err = pthread_cond_init(&cond->cond, NULL);
- if (err)
- error_exit(err, __func__);
- }
- void qemu_cond_destroy(QemuCond *cond)
- {
- int err;
- err = pthread_cond_destroy(&cond->cond);
- if (err)
- error_exit(err, __func__);
- }
- void qemu_cond_signal(QemuCond *cond)
- {
- int err;
- err = pthread_cond_signal(&cond->cond);
- if (err)
- error_exit(err, __func__);
- }
- void qemu_cond_broadcast(QemuCond *cond)
- {
- int err;
- err = pthread_cond_broadcast(&cond->cond);
- if (err)
- error_exit(err, __func__);
- }
- void qemu_cond_wait(QemuCond *cond, QemuMutex *mutex)
- {
- int err;
- err = pthread_cond_wait(&cond->cond, &mutex->lock);
- if (err)
- error_exit(err, __func__);
- }
- void qemu_thread_create(QemuThread *thread,
- void *(*start_routine)(void*),
- void *arg)
- {
- int err;
- /* Leave signal handling to the iothread. */
- sigset_t set, oldset;
- sigfillset(&set);
- pthread_sigmask(SIG_SETMASK, &set, &oldset);
- err = pthread_create(&thread->thread, NULL, start_routine, arg);
- if (err)
- error_exit(err, __func__);
- pthread_sigmask(SIG_SETMASK, &oldset, NULL);
- }
- void qemu_thread_get_self(QemuThread *thread)
- {
- thread->thread = pthread_self();
- }
- int qemu_thread_is_self(QemuThread *thread)
- {
- return pthread_equal(pthread_self(), thread->thread);
- }
- void qemu_thread_exit(void *retval)
- {
- pthread_exit(retval);
- }
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