127 lines
2.9 KiB
C
127 lines
2.9 KiB
C
#include <minix/mthread.h>
|
|
#include "global.h"
|
|
|
|
/*===========================================================================*
|
|
* mthread_event_init *
|
|
*===========================================================================*/
|
|
int mthread_event_init(event)
|
|
mthread_event_t *event; /* The event to be initialized */
|
|
{
|
|
/* Initialize an event object.
|
|
*/
|
|
int r;
|
|
|
|
if (!event)
|
|
return EINVAL;
|
|
|
|
r = mthread_mutex_init(&event->mutex, NULL);
|
|
if (r != 0)
|
|
return r;
|
|
|
|
r = mthread_cond_init(&event->cond, NULL);
|
|
if (r != 0)
|
|
mthread_mutex_destroy(&event->mutex);
|
|
|
|
return r;
|
|
}
|
|
|
|
|
|
/*===========================================================================*
|
|
* mthread_event_destroy *
|
|
*===========================================================================*/
|
|
int mthread_event_destroy(event)
|
|
mthread_event_t *event; /* The event to be destroyed */
|
|
{
|
|
/* Destroy an event object.
|
|
*/
|
|
int r;
|
|
|
|
if (!event)
|
|
return EINVAL;
|
|
|
|
r = mthread_cond_destroy(&event->cond);
|
|
if (r != 0)
|
|
return r;
|
|
|
|
return mthread_mutex_destroy(&event->mutex);
|
|
}
|
|
|
|
/*===========================================================================*
|
|
* mthread_event_wait *
|
|
*===========================================================================*/
|
|
int mthread_event_wait(event)
|
|
mthread_event_t *event; /* The event to be waited on */
|
|
{
|
|
/* Wait for an event, blocking the current thread in the process.
|
|
*/
|
|
int r;
|
|
|
|
if (!event)
|
|
return EINVAL;
|
|
|
|
r = mthread_mutex_lock(&event->mutex);
|
|
if (r != 0)
|
|
return r;
|
|
|
|
r = mthread_cond_wait(&event->cond, &event->mutex);
|
|
if (r != 0) {
|
|
mthread_mutex_unlock(&event->mutex);
|
|
return r;
|
|
}
|
|
|
|
return mthread_mutex_unlock(&event->mutex);
|
|
}
|
|
|
|
/*===========================================================================*
|
|
* mthread_event_fire *
|
|
*===========================================================================*/
|
|
int mthread_event_fire(event)
|
|
mthread_event_t *event; /* The event to be fired */
|
|
{
|
|
/* Fire an event, waking up any thread blocked on it.
|
|
*/
|
|
int r;
|
|
|
|
if (!event)
|
|
return EINVAL;
|
|
|
|
r = mthread_mutex_lock(&event->mutex);
|
|
if (r != 0)
|
|
return r;
|
|
|
|
r = mthread_cond_signal(&event->cond);
|
|
if (r != 0) {
|
|
mthread_mutex_unlock(&event->mutex);
|
|
return r;
|
|
}
|
|
|
|
return mthread_mutex_unlock(&event->mutex);
|
|
}
|
|
|
|
|
|
/*===========================================================================*
|
|
* mthread_event_fire_all *
|
|
*===========================================================================*/
|
|
int mthread_event_fire_all(event)
|
|
mthread_event_t *event; /* The event to be fired */
|
|
{
|
|
/* Fire an event, waking up any thread blocked on it.
|
|
*/
|
|
int r;
|
|
|
|
if (!event)
|
|
return EINVAL;
|
|
|
|
r = mthread_mutex_lock(&event->mutex);
|
|
if (r != 0)
|
|
return r;
|
|
|
|
r = mthread_cond_broadcast(&event->cond);
|
|
if (r != 0) {
|
|
mthread_mutex_unlock(&event->mutex);
|
|
return r;
|
|
}
|
|
|
|
return mthread_mutex_unlock(&event->mutex);
|
|
}
|