Re: Threads

From:

"Cholo Lennon" <chololennon@hotmail.com>

Newsgroups:

microsoft.public.vc.language

Date:

Wed, 3 Oct 2007 17:44:21 -0300

Message-ID:

<OxrMe1fBIHA.3548@TK2MSFTNGP06.phx.gbl>

Also you can code without using a timer message:

....
// Global or class members...
HANDLE g_hExitEvent;
HANDLE g_hThread;
DWORD g_dwTimeout;
....

g_hExitEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
g_dwTimeout = 200;
g_hThread = CreateThread(...)
....

DWORD WINAPI ThreadFunc( LPVOID lpParam )
{
  for (;;)
  {
    switch(WaitForSingleObject(hExit, g_dwTimeout)
    {
        case WAIT_OBJECT_0:
             // Thread cleanup
            ...
            return 0;

        case WAIT_TIMEOUT:
             // Your code to process 'timer' event
             ...
    }
  }
}

To stop the thread just signal event and wait some time (or infinite)
SetEvent(g_hExitEvent);
WaitForSingleObject(g_hThread, SOME_TIME);

Regards

--
Cholo Lennon
Bs.As.
ARG

"Lamefif" <Leonardo.Pjetri@googlemail.com> wrote in message
news:1191434154.525073.269760@o80g2000hse.googlegroups.com...

On Oct 3, 6:23 pm, "Mark Salsbery [MVP]"
<MarkSalsbery[MVP]@newsgroup.nospam> wrote:

"Lamefif" <Leonardo.Pje...@googlemail.com> wrote in message

news:1191427793.005247.76880@19g2000hsx.googlegroups.com...

hi,

case WM_CREATE: //CREATE WINDOW EVENT
SetTimer(hwnd, TimerID, 300, NULL);
Thread1 = CreateThread(NULL,0,Thread1EventProc,NULL,
0,&mThreadId); // mThreadId set to 1212
break;

----------------------

//thread callback function
unsigned long __stdcall Thread1EventProc(LPVOID param)
{
Sleep(100);
//int i;
i++; // global variable
return 0;
}

//-------------------

case WM_TIMER:
switch (wParam)
{
case TimerID:
{

OpenThread(THREAD_ALL_ACCESS,false,mThreadId);
return 0;
}
here is my attempt to rerun the thread, but is not working mThreadId
has the value 3492 here for some reason,
the program just keeps getting the timer message and Thread1EventProc
is not called.

Are you trying to do something like this?

HANDLE hTimerEvent = NULL;

...

case WM_CREATE: //CREATE WINDOW EVENT
hTimerEvent = ::CreateEvent(NULL, FALSE, FALSE, NULL);
SetTimer(hwnd, TimerID, 300, NULL);
Thread1 = CreateThread(NULL,0,Thread1EventProc,NULL,
0,&mThreadId); // mThreadId set to 1212
break;

...

//thread callback function
unsigned long __stdcall Thread1EventProc(LPVOID param)
{
   while (1) // you should provide a way to exit the thread!
   {
     ::WaitForSingleObject(hTimerEvent, INFINITE);

     //int i;
     i++; // global variable
   }

return 0;
}

...

case WM_TIMER:
switch (wParam)
{
case TimerID:
{
    ::SetEvent(hTimerEvent);
   return 0;
}

--
Mark Salsbery
Microsoft MVP - Visual C++

Hey Mark :) .. yes thanks .. all