/* * 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 mode) { sigset_t set, oldset; int err; pthread_attr_t attr; err = pthread_attr_init(&attr); if (err) { error_exit(err, __func__); } if (mode == QEMU_THREAD_DETACHED) { err = pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED); if (err) { error_exit(err, __func__); } } /* Leave signal handling to the iothread. */ sigfillset(&set); pthread_sigmask(SIG_SETMASK, &set, &oldset); err = pthread_create(&thread->thread, &attr, start_routine, arg); if (err) error_exit(err, __func__); pthread_sigmask(SIG_SETMASK, &oldset, NULL); pthread_attr_destroy(&attr); } 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); } void *qemu_thread_join(QemuThread *thread) { int err; void *ret; err = pthread_join(thread->thread, &ret); if (err) { error_exit(err, __func__); } return ret; }