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/*
*
* (C) Copyright IBM Corp. 2002, 2003
*
* 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 2 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Module: ecemainloop.c
*/
/* NOTE THIS IS A TEMPORARY FILE THAT MIMICS THE GLIB'S MAINLOOP BEHAVIOUR.
* GLIB 1.2 DOES NOT ALLOW TWO INSTANCES OF MAINLOOP RUNNING SIMULTANEOUSLY.
*/
#include <ece.h>
#include <sys/poll.h>
#include "eceinternal.h"
static IPCDispatch ipcdisp;/*dispatch callback for ipc channel */
static IPC_Channel *ipc_ch; /* ipc channel */
static GDestroyNotify ipcdest; /* destroy callback for ipc channel */
static GSourceFunc timedisp; /* dispatch callback for timeout */
static guint tintval; /* timeout interval */
static gboolean initflag = FALSE; /* is this subsystem initialized? */
static gboolean runflag; /* is the loop running ? */
static struct pollfd ipcfd[2]; /* we have maximum 2 fds */
void
ece_main_cleanup()
{
LOG_ENTRY();
ipcdisp = NULL;
ipc_ch = NULL;
ipcdest = NULL;
timedisp = NULL;
tintval = 100000;/* a large default timeout value */
initflag = FALSE;
runflag = FALSE;
LOG_EXIT_VOID();
}
void
ece_main_init(IPC_Channel *ch,
IPCDispatch ipdispatch,
GDestroyNotify ipdestroy,
guint interval,
GSourceFunc tdispatch)
{
LOG_ENTRY();
if(!initflag) {
ece_main_cleanup();
ipcdisp = ipdispatch;
ipcdest = ipdestroy;
timedisp = tdispatch;
tintval = interval;
ipc_ch = ch;
initflag = TRUE;
runflag = TRUE;
} else {
LOG_SERIOUS("IPC_Channel already initialized\n");
LOG_EXIT_VOID();
return;
}
LOG_EXIT_VOID();
}
static gboolean
dispatch(IPC_Channel *ch, IPCDispatch ipcdisp, GDestroyNotify ipcdest)
{
LOG_ENTRY();
if(ipcdisp && ch && ipcdisp(ch, NULL) == FALSE) {
if(ipcdest) ipcdest(NULL);
ch->ops->destroy(ch);
LOG_EXIT_BOOL(FALSE);
return FALSE;
}
LOG_EXIT_BOOL(TRUE);
return TRUE;
}
/* should be called when ece_main_run terminates */
void
ece_main_destroy()
{
LOG_ENTRY();
if(ipc_ch) ipc_ch->ops->destroy(ipc_ch);
ece_main_cleanup();
LOG_EXIT_VOID();
}
/* runs the loop and dispatches callbacks when any ipc event is sensed
* as well as dispatches timeout callbacks regularly
* The only way out of this loop is through thread terminate signal.
*/
void
ece_main_run()
{
LOG_ENTRY();
if(!initflag) {
LOG_SERIOUS("IPC_Channel not initialized\n");
LOG_EXIT_VOID();
return;
}
while(runflag) {
if(ipc_ch && ipc_ch->ops->is_message_pending(ipc_ch)) {
if(!dispatch(ipc_ch,ipcdisp,ipcdest)) {
ipcdisp = NULL;
ipcdest = NULL;
ipc_ch = NULL;
}
}
if(ipc_ch) {
int count = 0, ret;
int rfd = ipc_ch->ops->get_recv_select_fd(ipc_ch);
int wfd = ipc_ch->ops->get_send_select_fd(ipc_ch);
ipcfd[count].fd = rfd;
ipcfd[count].events =
POLLIN|POLLPRI|POLLERR|POLLHUP|POLLNVAL;
if(ipc_ch->ops->is_sending_blocked(ipc_ch)) {
ipcfd[count].events |= POLLOUT;
}
ipcfd[count++].revents = 0;
if(rfd!=wfd) {
ipcfd[count].fd = wfd;
ipcfd[count].events =
POLLIN|POLLPRI|POLLERR|POLLHUP|POLLNVAL;
if(ipc_ch->ops->is_sending_blocked(ipc_ch)) {
ipcfd[count].events |= POLLOUT;
}
ipcfd[count++].revents = 0;
}
if((ret = poll(ipcfd, count, tintval)) >0) {
int i;
for(i=0; i<count; i++) {
if(!dispatch(ipc_ch,ipcdisp,ipcdest)) {
ipcdisp = NULL;
ipcdest = NULL;
ipc_ch = NULL;
}
}
} else if (ret < 0) {
continue;
}
} else {
/* sleep timeout interval */
poll(NULL,0,tintval);
}
if(timedisp) timedisp(NULL);
pthread_testcancel();/* check if we have to terminate */
}
LOG_EXIT_VOID();
}
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