comm_manager_dispatcher.c
3.09 KB
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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 <sys/types.h>
#include <sys/wait.h>
#include <semaphore.h>
#include <errno.h>
#include "trbase.h"
#include "trdata.h"
#include "trevent.h"
#include "tr/comm_manager.h"
#include "tr/comm_manager_dispatcher.h"
#include "tr/interface/comm_manager.h"
#include "tr/comm_end_point.h"
#include "tr/connection.h"
#include "tr/connect_entry_point.h"
#include "tr/_comm_manager.h" // ?? may we don't need this one
static
int
commManagerDispatcherCtor(void * _this, va_list * params)
{
TR_CommManagerDispatcher this = _this;
TR_PARENTCALL(TR_CommManagerDispatcher, _this, TR_Class, ctor, params);
this->workers = va_arg(*params, TR_Set);
return 0;
}
static
void
commManagerDispatcherDtor(void * _this)
{
TR_PARENTCALL(TR_CommManagerDispatcher, _this, TR_Class, dtor);
}
static
TR_EventDone
TR_commManagerDispatcherSendEndpoint(void * _this, TR_CommEndPoint endpoint)
{
TR_CommManagerDispatcher this = _this;
TR_CommWorker worker = NULL;
int pid_stat;
/* code to dispatch stuff.... */
while (! TR_setEmpty(this->workers) && ! worker) {
if (! TR_iterableValid(this->workers)) {
TR_iterableRewind(this->workers);
}
worker = (TR_CommWorker)TR_iterableCurrent(this->workers);
if (0 != waitpid(worker->pid, &pid_stat, WNOHANG)) {
TR_setDelete(this->workers, worker);
TR_delete(worker);
continue;
}
}
if (! worker) {
TR_delete(endpoint); // no ones there to handle you, sorry...
return TR_EVENT_DONE;
}
TR_iterableNext(this->workers);
if (-1 == sem_trywait(&(worker->shm->semaphore))) {
switch(errno) {
case EAGAIN:
case EINTR:
break;
default:
TR_setDelete(this->workers, worker);
TR_delete(worker);
break;
}
}
memcpy(
&(worker->shm->socket),
endpoint->transport,
sizeof(struct c_TR_Socket));
TR_socketSendFd(worker->socket, TR_socketHandle(endpoint->transport));
TR_delete(endpoint);
return TR_EVENT_DONE;
}
static
void
TR_commManagerDispatcherCvInit(TR_class_ptr cls)
{
TR_INHERIT_CLASSVARS(TR_CommManagerDispatcher, TR_CommManager);
}
TR_INIT_IFACE(TR_Class, commManagerDispatcherCtor,
commManagerDispatcherDtor, NULL);
TR_INIT_IFACE(TR_CommManager, TR_commManagerDispatcherSendEndpoint,
NULL, NULL, NULL, NULL, NULL, NULL);
TR_CREATE_CLASS(
TR_CommManagerDispatcher,
TR_CommManager,
TR_commManagerDispatcherCvInit,
TR_IF(TR_Class),
TR_IF(TR_CommManager));
// vim: set ts=4 sw=4: