Multi-Threading - Stopping A Thread?

[Trippin_On_X]

Alrighty, I'm understanding threads alot more than I was before heheh but here's my next hurdle. I created a thread and got it working fine but now I can't figure out how to stop it. I would like the thread to stop running when I click on the quit button I have setup.

case ID_QUITBTN:
?
break;

[Technocrat]

Can you post the code of how you are getting the thread to fire

[CornedBee]

Usually you pass a flag (e.g. a BOOL variable) inside the thread's params. The thread should repeatedly check this flag - if it is set, the thread returns.

[Trippin_On_X]

// Here's where the function's at.
void APICallAction()
{
// API Calls here
}

// Here's where I fire off the thread.
case ID_ACTIONBTN:
HANDLE APICallThread;
DWORD threadID;
APICallThread=CreateThread(0, 0, (LPTHREAD_START_ROUTINE) APICallAction, 0, 0, &threadID);
break;


Need anything else?

[CornedBee]

The prototype of the thread func must be
void Name (LPVOID);
no matter whether you use the argument or not. Otherwise you just might get serious problems. And it saves you from having to cast to LPTHREAD_START_ROUTINE.

Inside the LPVOID parameter you can pass things to the thread, like here:


// Here's where the function's at.
void APICallAction(LPVOID pArg)
{
PBOOL pCon = (PBOOL)pArg;
while(*pCon)
{
// Do something here
}
delete pCon;
}

// Here's where I fire off the thread.
case ID_ACTIONBTN:
HANDLE APICallThread;
DWORD threadID;
PBOOL pCon = new BOOL; // save this pointer somewhere
// maybe static in WndProc
*pCon = TRUE;
APICallThread=CreateThread(0, 0, (LPTHREAD_START_ROUTINE) APICallAction, pCon, 0, &threadID);
break;

// When you want the thread to end:
*pCon = FALSE; // thread willl terminate a few milliseconds later