int EventLoop::handle_events()
{
int nevents = get_ready_events();
assert(nevents);
log_debug("ready events: " << nevents);
int result = handle_timer_events();
if (result > 0)
return result;
result = handle_io_events();
return result;
}
int event_loop( long timeout )
{
long max_fd = 0;
fd_set fds_read, fds_write, fds_exception;
if( ! create_event_set( &fds_read, &fds_write, &fds_exception, &max_fd ) )
return -1;
time_t now = rel_time(0L);
long alarm_time = alarm_getnext();
// Reduce 'timeout' to ensure the next scheduled alarm occurs on time
if( alarm_time >= 0 ) {
if( alarm_time > now ) {
if( timeout > ( alarm_time - now ))
timeout = alarm_time - now;
} else
timeout = 0;
}
#ifdef USE_PSELECT
// If I know there are signals which need processing, reset the select timeout to 0
// Signals are normally blocked, so these would be manufactured events.
struct timespec tm = { timeout / 1000, (timeout % 1000) * 1000 * 1000 };
if( event_signals.event_signal_pending_count )
tm.tv_nsec = tm.tv_sec = 0;
int rc = pselect( (int) max_fd, &fds_read, &fds_write, &fds_exception, &tm, &event_signals.event_signal_default );
#else
// expect queued signals to occur immediately
sigprocmask( SIG_SETMASK, &event_signals.event_signal_default, NULL );
sleep(0);
if( event_signals.event_signal_pending_count )
timeout = 0;
struct timeval tm = { timeout / 1000, (timeout % 1000) * 1000 };
#if 0
#ifndef NDEBUG
int i = 0;
printf("READ: ");
for(i=0;i<64;i++)
if(FD_ISSET(i,&fds_read)) {
printf("%d ",i);
if( fcntl( i, F_GETFL ) < 0 )
printf("*");
}
printf("WRITE: ");
for(i=0;i<64;i++)
if(FD_ISSET(i,&fds_write)) {
printf("%d ",i);
if( fcntl( i, F_GETFL ) < 0 )
printf("*");
}
printf("EXCEPTION: ");
for(i=0;i<64;i++)
if(FD_ISSET(i,&fds_exception)) {
printf("%d ",i);
if( fcntl( i, F_GETFL ) < 0 )
printf("*");
}
printf("\n");
#endif
#endif
#ifndef NDEBUG
//printf("calling select...");fflush(stdout);
#endif
int rc = select( max_fd, &fds_read, &fds_write, &fds_exception, &tm );
#ifndef NDEBUG
//printf("done\n");fflush(stdout);
#endif
#endif
sigprocmask(SIG_BLOCK, &event_signals.event_signal_mask, NULL);
if( rc < 0 ) {
if( (errno != EINTR)
#ifdef mips
&& (errno != ENOENT)
#endif
) {
d_printf("(p)select returned %d (errno = %d - %s)\n",rc, errno, strerror(errno));
exit(0);
return -1;
} else {
return 0; // timeout - nothing to do
}
}
if( event_signals.event_signal_pending_count ) {
//d_printf("Calling handle_pending_signals()\n");
handle_pending_signals();
}
//d_printf("Calling handle_event_set()\n");
rc = handle_event_set( &fds_read, &fds_write, &fds_exception );
if( !rc ) {
//d_printf("Calling handle_timer_events()\n");
handle_timer_events();
}
return 0;
}
