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/* $Id$ */
/*
* Copyright (C) 2011-2011 Teluu Inc. (http://www.teluu.com)
*
* This program 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.
*
* This program 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
*/
#include <pjmedia/event.h>
#include <pjmedia/errno.h>
#include <pj/assert.h>
#include <pj/log.h>
#include <pj/string.h>
#define THIS_FILE "event.c"
#if 1
# define TRACE_(x) PJ_LOG(6,x)
#else
# define TRACE_(x)
#endif
PJ_DEF(void) pjmedia_event_init( pjmedia_event *event,
pjmedia_event_type type,
const pj_timestamp *ts,
const pjmedia_event_publisher *epub)
{
pj_bzero(event, sizeof(*event));
event->type = type;
if (ts)
event->timestamp.u64 = ts->u64;
event->epub = epub;
if (epub)
event->epub_sig = epub->sig;
}
PJ_DEF(void) pjmedia_event_publisher_init(pjmedia_event_publisher *epub,
pjmedia_obj_sig sig)
{
pj_bzero(epub, sizeof(*epub));
pj_list_init(&epub->subscription_list);
epub->sig = sig;
}
PJ_DEF(void) pjmedia_event_subscription_init( pjmedia_event_subscription *esub,
pjmedia_event_cb *cb,
void *user_data)
{
pj_bzero(esub, sizeof(*esub));
esub->cb = cb;
esub->user_data = user_data;
}
PJ_DEF(pj_bool_t)
pjmedia_event_publisher_has_sub(pjmedia_event_publisher *epub)
{
PJ_ASSERT_RETURN(epub, PJ_FALSE);
return epub->subscription_list.next &&
(!pj_list_empty(&epub->subscription_list));
}
PJ_DEF(pj_status_t) pjmedia_event_subscribe( pjmedia_event_publisher *epub,
pjmedia_event_subscription *esub)
{
PJ_ASSERT_RETURN(epub && esub && esub->cb, PJ_EINVAL);
/* Must not currently subscribe to anything */
PJ_ASSERT_RETURN(esub->subscribe_to == NULL, PJ_EINVALIDOP);
pj_list_push_back(&epub->subscription_list, esub);
esub->subscribe_to = epub;
return PJ_SUCCESS;
}
PJ_DEF(pj_status_t) pjmedia_event_unsubscribe(pjmedia_event_subscription *esub)
{
PJ_ASSERT_RETURN(esub, PJ_EINVAL);
if (esub->subscribe_to) {
PJ_ASSERT_RETURN(
pj_list_find_node(&esub->subscribe_to->subscription_list,
esub)==esub, PJ_ENOTFOUND);
pj_list_erase(esub);
esub->subscribe_to = NULL;
}
return PJ_SUCCESS;
}
PJ_DEF(pj_status_t) pjmedia_event_publish( pjmedia_event_publisher *epub,
pjmedia_event *event)
{
pjmedia_event_subscription *esub;
char event_name[5];
char epub_name[5];
pj_status_t err = PJ_SUCCESS;
PJ_ASSERT_RETURN(epub && event, PJ_EINVAL);
TRACE_((THIS_FILE, "Event %s is published by publisher %s",
pjmedia_fourcc_name(event->type, event_name),
pjmedia_fourcc_name(epub->sig, epub_name)));
esub = epub->subscription_list.next;
if (!esub)
return err;
while (esub != &epub->subscription_list) {
pjmedia_event_subscription *next;
pj_status_t status;
/* just in case esub is destroyed in the callback */
next = esub->next;
status = (*esub->cb)(esub, event);
if (status != PJ_SUCCESS && err == PJ_SUCCESS)
err = status;
esub = next;
}
return err;
}
static pj_status_t republisher_cb(pjmedia_event_subscription *esub,
pjmedia_event *event)
{
return pjmedia_event_publish((pjmedia_event_publisher*)esub->user_data,
event);
}
PJ_DEF(pj_status_t) pjmedia_event_republish(pjmedia_event_publisher *esrc,
pjmedia_event_publisher *epub,
pjmedia_event_subscription *esub)
{
PJ_ASSERT_RETURN(esrc && epub && esub, PJ_EINVAL);
pjmedia_event_subscription_init(esub, &republisher_cb, epub);
return pjmedia_event_subscribe(esrc, esub);
}
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