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/**************************************************************/
/* ********************************************************** */
/* * * */
/* * ALARM * */
/* * * */
/* * $Module: ALARM * */
/* * * */
/* * Copyright (C) 2006 * */
/* * MPI fuer Informatik * */
/* * * */
/* * 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 * */
/* * * */
/* * * */
/* $Revision: 1.1 $ * */
/* $State: Exp $ * */
/* $Date: 2007/07/13 08:38:25 $ * */
/* $Author: weidenb $ * */
/* * * */
/* * Contact: * */
/* * Christoph Weidenbach * */
/* * MPI fuer Informatik * */
/* * Stuhlsatzenhausweg 85 * */
/* * 66123 Saarbruecken * */
/* * Email: spass@mpi-inf.mpg.de * */
/* * Germany * */
/* * * */
/* ********************************************************** */
/**************************************************************/
/* $RCSfile: alarm.c,v $ */
#include "alarm.h"
#include <windows.h>
#include <mmsystem.h>
#include <stdio.h>
#include <stdlib.h>
/**************************************************************/
/* Globals */
/**************************************************************/
static UINT WindowsTimerResolution;
static int alarm_TIMEOUT; /* Set to 1 if the SPASS time polling detects out of time, we
do not use BOOL because of Windows incompatability*/
/**************************************************************/
/* Functions */
/**************************************************************/
static void alarm_OutOfTime(void)
/**************************************************************
INPUT: The global alarm_TIMEOUT variable.
RETURNS: None.
EFFECT: Exits the program unless alarm_TIMEOUT is TRUE, meaning
that the SPASS mainloop has already detected the timeout.
***************************************************************/
{
if (alarm_TIMEOUT != 1) {
printf("\nSPASS %s ", vrs_VERSION);
puts("\nSPASS beiseite: Ran out of time. SPASS was killed.\n");
exit(EXIT_FAILURE);
}
}
static
void CALLBACK alarm_Callback(UINT WindowsTimerID, UINT Message,
DWORD UserData, DWORD Data1,
DWORD Data2)
/*********************************************************
INPUT: A windows timer ID, a message, a user data dword,
and two additional dwords of data. The input
can be safely ignored in SPASS' case.
EFFECT: Invokes the SPASS out of time handler under
Windows.
RETURNS: None.
**********************************************************/
{
alarm_OutOfTime();
if (timeEndPeriod(WindowsTimerResolution)
!= TIMERR_NOERROR)
exit(EXIT_FAILURE);
exit(EXIT_SUCCESS);
}
static
void alarm_SetAlarmCallback(UINT MilliSecondInterval)
/*********************************************************
INPUT: The interval before the callback is initiated
in milliseconds.
EFFECT: Set up the timer under Windows to call a
callback function to invoke SPASS' out of time
handler.
RETURNS: None.
**********************************************************/
{
const UINT TargetResolution = 1;
TIMECAPS TimeCaps;
if (timeGetDevCaps(&TimeCaps, sizeof(TIMECAPS))
== TIMERR_NOERROR)
{
WindowsTimerResolution = min(max(TimeCaps.wPeriodMin,
TargetResolution),
TimeCaps.wPeriodMax);
if (timeBeginPeriod(WindowsTimerResolution)
== TIMERR_NOERROR)
{
if (timeSetEvent(
MilliSecondInterval,
WindowsTimerResolution,
alarm_Callback,
0,
TIME_ONESHOT
) != 0)
{
/* everything setup fine */
return;
}
}
}
exit(EXIT_FAILURE);
}
void alarm_Init(void)
/*********************************************************
INPUT: None.
EFFECT: Initializes the alarm module.
RETURNS: None.
MEMORY: None.
**********************************************************/
{
alarm_TIMEOUT = 0;
}
void alarm_Off(void)
/*********************************************************
INPUT: None.
EFFECT: Turns off the alarm module.
RETURNS: None.
MEMORY: None.
**********************************************************/
{
alarm_TIMEOUT = 1;
}
void alarm_SetAlarm(int Seconds)
/**************************************************************
INPUT: A duration in seconds.
RETURNS: None.
EFFECT: Starts a alarm that will triger after duration seconds.
***************************************************************/
{
const unsigned int MillisecondsInASecond = 1000;
alarm_SetAlarmCallback(Seconds * MillisecondsInASecond);
}
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