qemu-thread: add qemu_mutex/cond_destroy and qemu_mutex_exit

Add some missing functions in qemu-thread. Currently qemu-thread
is only used for io-thread but it will used by the vnc server soon
and we need those functions instead of calling pthread directly.
Signed-off-by: NCorentin Chary <corentincj@iksaif.net>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

qemu-thread.c

@@ -34,6 +34,15 @@ void qemu_mutex_init(QemuMutex *mutex)
         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;
@@ -90,6 +99,15 @@ void qemu_cond_init(QemuCond *cond)
         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;
@@ -168,3 +186,7 @@ int qemu_thread_equal(QemuThread *thread1, QemuThread *thread2)
    return pthread_equal(thread1->thread, thread2->thread);
 }
 
+void qemu_thread_exit(void *retval)
+{
+    pthread_exit(retval);
+}

qemu-thread.h

@@ -20,12 +20,14 @@ typedef struct QemuCond QemuCond;
 typedef struct QemuThread QemuThread;
 
 void qemu_mutex_init(QemuMutex *mutex);
+void qemu_mutex_destroy(QemuMutex *mutex);
 void qemu_mutex_lock(QemuMutex *mutex);
 int qemu_mutex_trylock(QemuMutex *mutex);
 int qemu_mutex_timedlock(QemuMutex *mutex, uint64_t msecs);
 void qemu_mutex_unlock(QemuMutex *mutex);
 
 void qemu_cond_init(QemuCond *cond);
+void qemu_cond_destroy(QemuCond *cond);
 void qemu_cond_signal(QemuCond *cond);
 void qemu_cond_broadcast(QemuCond *cond);
 void qemu_cond_wait(QemuCond *cond, QemuMutex *mutex);
@@ -37,4 +39,6 @@ void qemu_thread_create(QemuThread *thread,
 void qemu_thread_signal(QemuThread *thread, int sig);
 void qemu_thread_self(QemuThread *thread);
 int qemu_thread_equal(QemuThread *thread1, QemuThread *thread2);
+void qemu_thread_exit(void *retval);
+
 #endif