Communication protocol handler for the taskrambler framework. This does not contain specific protocol implementations but the abstract code to handle them.
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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/>.
*/
#include <errno.h>
#include <poll.h>
#include "trbase.h"
#include "trevent.h"
#include "tr/interface/comm_manager.h"
#include "tr/comm_end_point.h"
#include "tr/comm_manager.h"
TR_CREATE_INTERFACE(TR_CommManager, 7);
void
TR_commManagerAddEndpoint(void * _this, TR_CommEndPoint endpoint)
{
TR_CommManager this = _this;
if (this->endpoints[endpoint->transport->handle]) {
// this should never happen, but if so we assume this is a leftover
// that still has to be deleted.
TR_delete(this->endpoints[endpoint->transport->handle]);
}
this->endpoints[endpoint->transport->handle] = endpoint;
TR_CALL(_this, TR_CommManager, addEndpoint, endpoint);
}
int
TR_commManagerSelect(void * _this, TR_Event event)
{
int timeout; // milliseconds
int * timeoutptr = event->data;
TR_EventDispatcher dispatcher = (TR_EventDispatcher)event->subject;
if (NULL == timeoutptr) {
timeout = TR_eventDispatcherGetDataWaitTime(dispatcher);
} else {
timeout = *timeoutptr;
TR_MEM_FREE(timeoutptr);
}
TR_CALL(_this, TR_CommManager, select, event, timeout);
return 1;
}
int
TR_commManagerEnableWrite(void * _this, TR_Event event)
{
TR_CALL(_this, TR_CommManager, enableWrite, event);
return 1;
}
int
TR_commManagerDisableWrite(void * _this, TR_Event event)
{
TR_EventHandler this = _this;
TR_CommEndPoint endpoint = (TR_CommEndPoint)event->subject;
TR_CALL(_this, TR_CommManager, disableWrite, event);
if (TR_socketFinRd(endpoint->transport)) {
TR_eventHandlerIssueEvent(
this,
event->subject,
TR_CEP_EVENT_SHUT_READ,
NULL);
}
return 1;
}
int
TR_commManagerClose(void * _this, TR_Event event)
{
TR_CommManager this = _this;
TR_CommEndPoint endpoint = (TR_CommEndPoint)event->subject;
TR_socketShutdown(endpoint->transport);
TR_CALL(_this, TR_CommManager, close, event);
TR_delete(this->endpoints[endpoint->transport->handle]);
return 0;
}
int
TR_commManagerShutdownRead(void * _this, TR_Event event)
{
TR_CALL(_this, TR_CommManager, shutdownRead, event);
if (TR_socketFinRd(((TR_CommEndPoint)event->subject)->transport)) {
// close
TR_eventHandlerIssueEvent(
(TR_EventHandler)_this,
event->subject,
TR_CEP_EVENT_CLOSE,
NULL);
} else if (TR_cepHasPendingData((TR_CommEndPoint)event->subject)) {
// handle pending data... close is issued from disableWrite
TR_eventHandlerIssueEvent(
(TR_EventHandler)_this,
event->subject,
TR_CEP_EVENT_CLOSE,
NULL);
} else {
TR_cepSetClose((TR_CommEndPoint)event->subject);
}
return 0;
}
int
TR_commManagerShutdownWrite(void * _this, TR_Event event)
{
TR_CALL(_this, TR_CommManager, shutdownWrite, event);
if (TR_socketFinRd(((TR_CommEndPoint)event->subject)->transport)) {
TR_eventHandlerIssueEvent(
(TR_EventHandler)_this,
event->subject,
TR_CEP_EVENT_CLOSE,
NULL);
}
return 0;
}
// vim: set ts=4 sw=4: