Thread and Timer

Stefano <>
Wed, 12 Mar 2008 00:55:52 -0700 (PDT)
  I'd like to use a timer inside a thread (CWinThread derived class).
If I use the CALLBACK procedure I get the timer, if I don't use the
CALLBACK and handle in OnTimer I never get the message.
Here is the code:

// WatchDog.cpp : implementation file

#include "stdafx.h"
#include "xcrashreport.h"
#include "WatchDog.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;

CString g_sFileName;
HWND g_hWnd;
UINT g_iMessage;
UINT g_iTimer;
UINT g_iTimerTimeout;

// CWatchDog

void CALLBACK OnTimerProc(
    HWND hwnd, // handle to window
    UINT uMsg, // WM_TIMER message
    UINT_PTR idEvent, // timer identifier
    DWORD dwTime // current system time
{ // OnTimerProc

    if (idEvent == g_iTimer)
        PostMessage(g_hWnd, g_iMessage, WPARAM (0), LPARAM (0));

        KillTimer( NULL, g_iTimer );
        AfxEndThread( 0, false );


} // OnTimerProc


BOOL CWatchDog::InitInstance()
    // TODO: perform and per-thread initialization here
    return TRUE;

int CWatchDog::ExitInstance()
    // TODO: perform any per-thread cleanup here
    return CWinThread::ExitInstance();

BOOL CWatchDog::IsIdleMessage( MSG* pMsg )
    if ( !CWinThread::IsIdleMessage( pMsg ) || ( pMsg->message ==
        return FALSE;
    return TRUE;

        // NOTE - the ClassWizard will add and remove mapping macros here.




// CWatchDog message handlers

void CWatchDog::Monitor(CString sFileName, HWND hWnd, UINT iMessage,
int iFrequency, int iTimeout)
    //g_iTimer = ::SetTimer(NULL, NULL, iFrequency, (TIMERPROC)

    g_iTimer = SetTimer(NULL, 0, iFrequency, NULL);
    g_hWnd = hWnd;
    g_iMessage = iMessage;

void CWatchDog::OnTimer(WPARAM wParam, LPARAM lParam)

    if ((UINT) wParam == g_iTimer)
        PostMessage(g_hWnd, g_iMessage, WPARAM (0), LPARAM (0));

Thanks in advance,

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