event_dispatcher_start.c
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/**
* \file
*
* \author Georg Hopp
*
* \copyright
* Copyright © 2014 Georg Hopp
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*/
#define _GNU_SOURCE
#include "trbase.h"
#include "trdata.h"
#include "trhash.h"
#include "tr/event.h"
#include "tr/event_subject.h"
#include "tr/event_dispatcher.h"
int ZERO = 0;
void
TR_eventDispatcherStart(TR_EventDispatcher this)
{
this->running = 1;
while (this->running || (! TR_queueEmpty(this->events))) {
TR_Event event;
TR_Queue handler_queue;
TR_HashValue handler_queue_hv;
pthread_mutex_lock(&(this->events_lock));
TR_eventDispatcherGetBeatTime(this);
if (this->n_beats) {
event = TR_eventSubjectEmit(
(TR_EventSubject)this,
TR_DISPATCHER_EVENT_HEARTBEAT,
NULL);
} else {
event = TR_queueGet(this->events);
if (! (event || this->events_poll || this->events_handling)) {
int evtid = TR_EVD_CLIENT == this->mode
? TR_DISPATCHER_EVENT_USER_WAIT
: TR_DISPATCHER_EVENT_DATA_WAIT;
this->events_poll = pthread_self();
event = TR_eventSubjectEmit((TR_EventSubject)this, evtid, NULL);
}
}
if (! event) {
char buffer[17];
pthread_getname_np(pthread_self(), buffer, 17);
TR_loggerLog(TR_logger, TR_LOGGER_DEBUG,
"[%s] - enter cond wait",
buffer);
pthread_cond_wait(&(this->events_cond), &(this->events_lock));
TR_loggerLog(TR_logger, TR_LOGGER_DEBUG,
"[%s] - leave cond wait",
buffer);
event = NULL;
pthread_mutex_unlock(&(this->events_lock));
continue;
} else {
this->events_handling++;
}
pthread_mutex_unlock(&(this->events_lock));
handler_queue_hv = TR_hashGetByVal(
this->handler,
TR_sdbm(
(unsigned char *)&(event->id),
sizeof(event->id)));
handler_queue = handler_queue_hv
? *(TR_Queue *)handler_queue_hv->value
: NULL;
if (handler_queue && ! TR_queueEmpty(handler_queue)) {
TR_Queue queue_node = handler_queue->first;
TR_EventDone done = TR_EVENT_PENDING;
while (queue_node) {
TR_EventHandler handler = queue_node->msg;
TR_EventDone this_done;
this_done = TR_eventHandlerHandleEvent(handler, event);
done = TR_EVENT_DONE == done ? done : this_done;
queue_node = queue_node->next;
}
if (TR_EVENT_DONE == done) {
TR_delete(event);
} else {
TR_eventDispatcherEnqueueEvent(this, event);
}
} else {
TR_delete(event);
}
pthread_mutex_lock(&(this->events_lock));
this->events_handling--;
if (pthread_equal(this->events_poll, pthread_self())) {
this->events_poll = FALSE;
}
pthread_mutex_unlock(&(this->events_lock));
}
}
// vim: set ts=4 sw=4: