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/*
* Copyright (C) 2000-2001 the xine project
*
* This file is part of xine, a unix video player.
*
* xine is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* xine is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*
* $Id:
*
* Event handling functions
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "xine_internal.h"
int xine_register_event_listener (xine_p this_ro,
xine_event_listener_cb_t listener,
void *user_data) {
xine_t *this = (xine_t *)this_ro;
/* Ensure the listener is non-NULL */
if(listener == NULL) {
return 0;
}
pthread_mutex_lock(&this->event_lock);
/* Check we hava a slot free */
if(this->num_event_listeners < XINE_MAX_EVENT_LISTENERS) {
this->event_listeners[this->num_event_listeners] = listener;
this->event_listener_user_data[this->num_event_listeners] = user_data;
this->num_event_listeners++;
pthread_mutex_unlock(&this->event_lock);
return 1;
}
pthread_mutex_unlock(&this->event_lock);
return 0;
}
void xine_send_event(xine_p this, xine_event_t *event) {
uint16_t i;
pthread_mutex_lock(&this->event_lock);
while (this->event_pending[event->type])
/* there is already one event of that type around */
pthread_cond_wait(&this->event_handled, &this->event_lock);
this->event_pending[event->type] = 1;
pthread_mutex_unlock(&this->event_lock);
/* Iterate through all event handlers */
for(i=0; i < this->num_event_listeners; i++) {
(this->event_listeners[i]) ((void *)this->event_listener_user_data[i], event);
}
this->event_pending[event->type] = 0;
pthread_cond_signal(&this->event_handled);
}
int xine_remove_event_listener(xine_p this_ro,
xine_event_listener_cb_t listener) {
xine_t *this = (xine_t *)this_ro;
uint16_t i, found, pending;
found = 1;
pthread_mutex_lock(&this->event_lock);
/* wait for any pending events */
do {
pending = 0;
for (i = 0; i < XINE_MAX_EVENT_TYPES; i++)
pending += this->event_pending[i];
if (pending)
pthread_cond_wait(&this->event_handled, &this->event_lock);
} while (pending);
i = 0;
/* Attempt to find the listener */
while((found == 1) && (i < this->num_event_listeners)) {
if(this->event_listeners[i] == listener) {
/* Set found flag */
found = 0;
this->event_listeners[i] = NULL;
/* If possible, move the last listener to the hole thats left */
if(this->num_event_listeners > 1) {
this->event_listeners[i] = this->event_listeners[this->num_event_listeners - 1];
this->event_listener_user_data[i] = this->event_listener_user_data[this->num_event_listeners - 1];
this->event_listeners[this->num_event_listeners - 1] = NULL;
}
this->num_event_listeners --;
}
i++;
}
pthread_mutex_unlock(&this->event_lock);
return found;
}
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