io_handler.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/>.
*/
#include <unistd.h>
#include <inttypes.h>
#include <stdio.h>
#include "trbase.h"
#include "trevent.h"
#include "trio.h"
#include "tr/io_handler.h"
#include "tr/comm_end_point.h"
#include "tr/interface/comm_end_point.h"
static
int
ioHandlerCtor(void * _this, va_list * params)
{
TR_PARENTCALL(TR_IoHandler, _this, TR_Class, ctor, params);
return 0;
}
static void ioHandlerDtor(void * _this) {}
static
TR_EventDone
ioHandlerRead(void * _this, TR_Event event)
{
TR_CommEndPoint endpoint = (TR_CommEndPoint)event->subject;
TR_Event revent;
TR_RemoteData data;
switch (TR_commEndPointRead(endpoint, &data)) {
case FALSE: // EAGAIN
revent = TR_eventSubjectEmit(
event->subject,
TR_CEP_EVENT_READ_BLOCK,
NULL);
break;
case -1: // error
revent = TR_eventSubjectEmit(
event->subject,
TR_CEP_EVENT_CLOSE,
NULL);
break;
default:
case -2: // remote close
revent = TR_eventSubjectEmit(
event->subject,
TR_CEP_EVENT_SHUT_READ,
NULL);
break;
case -3: // read limit
return TR_EVENT_DONE;
case TRUE:
revent = TR_eventSubjectEmit(
event->subject,
TR_CEP_EVENT_NEW_DATA,
data);
break;
}
TR_eventHandlerIssueEvent((TR_EventHandler)_this, revent);
return TR_EVENT_DONE;
}
static
TR_EventDone
ioHandlerWrite(void * _this, TR_Event event)
{
TR_Event revent = NULL;
TR_CommEndPoint endpoint = (TR_CommEndPoint)event->subject;
size_t written;
switch (TR_cepWriteBuffered(endpoint, &written)) {
case FALSE: // EAGAIN
revent = TR_eventSubjectEmit(
event->subject,
TR_CEP_EVENT_WRITE_BLOCK,
NULL);
break;
case -1: // FAILURE
revent = TR_eventSubjectEmit(
event->subject,
TR_CEP_EVENT_CLOSE,
NULL);
break;
case -2: // remote close
revent = TR_eventSubjectEmit(
event->subject,
TR_CEP_EVENT_SHUT_WRITE,
NULL);
break;
case -3: // remote end not ready
break;
case -4: // no more data to send
revent = TR_eventSubjectEmit(
event->subject,
TR_CEP_EVENT_DATA_END,
NULL);
break;
default:
// TODO This still looks wrong...
if (TRUE == endpoint->do_close) {
revent = TR_eventSubjectEmit(
event->subject,
TR_CEP_EVENT_CLOSE,
NULL);
}
}
endpoint->write_buffer_size -= written;
if (revent) {
TR_eventHandlerIssueEvent((TR_EventHandler)_this, revent);
}
return TR_EVENT_DONE;
}
static
void
ioHandlerCvInit(TR_class_ptr cls)
{
TR_EVENT_HANDLER_SET_METHOD(
cls,
TR_CommEndPoint,
TR_CEP_EVENT_DO_READ,
ioHandlerRead);
TR_EVENT_HANDLER_SET_METHOD(
cls,
TR_CommEndPoint,
TR_CEP_EVENT_DO_WRITE,
ioHandlerWrite);
}
TR_INSTANCE(TR_Hash, ioHandlerEventMethods);
TR_INIT_IFACE(TR_Class, ioHandlerCtor, ioHandlerDtor, NULL);
TR_CREATE_CLASS(
TR_IoHandler,
TR_EventHandler,
ioHandlerCvInit,
TR_IF(TR_Class)) = {
{ &(_ioHandlerEventMethods.data) }
};
// vim: set ts=4 sw=4: