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/** \file timer.c
* Timer Functions
*
* Copyright 2016 Martin Fischer <m_fischer@sf.net>
*
* 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., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*
*
*/
#include <stdio.h>
#include <sys/time.h>
#include <signal.h>
#define GTK_DISABLE_SINGLE_INCLUDES
#define GDK_DISABLE_DEPRECATED
#define GTK_DISABLE_DEPRECATED
#define GSEAL_ENABLE
#include <gtk/gtk.h>
#include <gdk/gdk.h>
#include "gtkint.h"
//#include "i18n.h"
static wBool_t gtkPaused = FALSE;
static int alarmTimer = 0;
static struct timeval startTime;
static wControl_p triggerControl = NULL;
static setTriggerCallback_p triggerFunc = NULL;
/**
* Signal handler for alarm timer - executes the defined function when
* timer expires
*
* \param data IN callback function
* \returns alwys 0
*/
static gint doAlarm(
gpointer data)
{
wAlarmCallBack_p func = (wAlarmCallBack_p)data;
func();
alarmTimer = 0;
return FALSE;
}
/**
* Alarm for <count> milliseconds.
*
* \param count IN time to wait
* \param func IN function called when timer expires
*/
void wAlarm(
long count,
wAlarmCallBack_p func) /* milliseconds */
{
gtkPaused = TRUE;
if (alarmTimer) {
g_source_remove(alarmTimer);
}
alarmTimer = g_timeout_add(count, doAlarm, (void *)(GSourceFunc)func);
}
static void doTrigger(void)
{
if (triggerControl && triggerFunc) {
triggerFunc(triggerControl);
triggerFunc = NULL;
triggerControl = NULL;
}
}
void wlibSetTrigger(
wControl_p b,
setTriggerCallback_p trigger)
{
triggerControl = b;
triggerFunc = trigger;
wAlarm(500, doTrigger);
}
/**
* Pause for <count> milliseconds.
*
* \param count IN
*/
void wPause(
long count) /* milliseconds */
{
while (gtk_events_pending()) {
gtk_main_iteration(); //Allow GTK to finish before pausing
}
struct timeval timeout;
sigset_t signal_mask;
sigset_t oldsignal_mask;
gdk_display_sync(gdk_display_get_default());
timeout.tv_sec = count/1000;
timeout.tv_usec = (count%1000)*1000;
sigemptyset(&signal_mask);
sigaddset(&signal_mask, SIGIO);
sigaddset(&signal_mask, SIGALRM);
sigprocmask(SIG_BLOCK, &signal_mask, &oldsignal_mask);
if (select(0, NULL, NULL, NULL, &timeout) == -1) {
perror("wPause:select");
}
sigprocmask(SIG_BLOCK, &oldsignal_mask, NULL);
}
/**
* Get time expired since start???
* \todo Check where start time is initialized!!!
*
* \returns time in seconds
*/
unsigned long wGetTimer(void)
{
struct timeval tv;
struct timezone tz;
gettimeofday(&tv, &tz);
return (tv.tv_sec-startTime.tv_sec+1) * 1000 + tv.tv_usec /1000;
}
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