comm_worker.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 <sys/types.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <sys/wait.h>
#include <stdarg.h>
#include <semaphore.h>
#include <unistd.h>
#include <fcntl.h>
#include "trbase.h"
#include "trio.h"
#include "tr/comm_worker.h"
static
int
commWorkerCtor(void * _this, va_list * params)
{
TR_CommWorker this = _this;
TR_Socket socket[2];
this->shm = mmap(NULL, sizeof(s_TR_WorkerShm),
PROT_READ|PROT_WRITE,
MAP_ANONYMOUS|MAP_SHARED,
0, 0);
sem_init(&(this->shm->semaphore), 1, 1);
TR_socketPair(socket, SOCK_DGRAM);
/* TODO error handling... */
switch (this->pid = fork()) {
case -1:
TR_delete(socket[0]);
TR_delete(socket[1]);
break;
case 0:
TR_delete(socket[0]);
this->socket = socket[1];
break;
default:
TR_delete(socket[1]);
this->socket = socket[0];
break;
}
return this->pid;
}
static void commWorkerDtor(void * _this) {
TR_CommWorker this = _this;
TR_delete(this->socket);
sem_close(&(this->shm->semaphore));
munmap(this->shm, sizeof(s_TR_WorkerShm));
if (this->pid != 0) {
int state;
waitpid(this->pid, &state, 0);
}
}
TR_INIT_IFACE(TR_Class, commWorkerCtor, commWorkerDtor, NULL);
TR_CREATE_CLASS(TR_CommWorker, NULL, NULL, TR_IF(TR_Class));
// vim: set ts=4 sw=4: