wdtw32.c

extremeDB s sample code,useful for you

/*****************************************************************
 *                                                               *
 *  wdtw32.c                                                     *
 *                                                               *
 * This file is a part of the eXtremeDB-HA Application Framework *
 *   It demonstrates McObject High Availabitity support and      *  
 * explains how to work with it.                                 *
 *                                                               * 
 *****************************************************************
 *  Copyright (c) 2001-2006 McObject LLC                         * 
 *  All Rights Reserved                                          *
 *****************************************************************/
/*
 * ++
 * 
 * PROJECT:   Ha Framework
 *
 * SUBSYSTEM: HA support
 *
 * MODULE:    wdtw32.c
 *
 * ABSTRACT:  WATCHDOG asynchron processing procedures for HA support
 *
 *
 * VERSION:   1.0
 *
 * HISTORY:
 *            1.0- 1 SS     19-Oct-2003 Created it was
 *
 * --
 */

#ifdef _WIN32

#define _WIN32_WINNT 0x0500
#include    "app.h"
#include    "watchdog.h"

static HANDLE timer;

void  WatchdogRoutine (
    LPVOID lpArgToCompletionRoutine,
    uint4 dwTimerLowValue,
    uint4 dwTimerHighValue
    )
{
  ((MCO_PWATCHDOG)lpArgToCompletionRoutine)();
}


int mco_create_watchdog( long msec, MCO_PWATCHDOG proc)
{
#ifdef CFG_SHARED_COMMIT
  FILETIME  time;

    if( (timer = CreateWaitableTimer (
                        0,          // pointer to security attributes
                        0,          // flag for manual reset state
                        NULL        // pointer to timer object name
                        )
        ) == NULL) return -1;

    time.dwHighDateTime = -1;//(msec/10000);
    time.dwLowDateTime = -(msec*10000);

    if( !SetWaitableTimer(
            timer,                          // handle to a timer object
            (const LARGE_INTEGER*)&time,    // when timer will become signaled
            msec,                           // periodic timer interval
            (PTIMERAPCROUTINE)WatchdogRoutine, // completion routine
            (LPVOID) proc,                  // data for completion routine

            0                               // flag for resume state
            ))
    {
      CloseHandle( timer );
      return -1; 
    }
#endif
    return  0;
}

void mco_kill_watchdog()
{
#ifdef CFG_SHARED_COMMIT
    CancelWaitableTimer( timer );
    CloseHandle( timer );
#endif
}

#endif /* _WIN32 */