asked on

All or nothing

How to make a group of statements act as one instruction? All of them are executed without being interrupted by other thread or none is executed.
Here is the trouble I meet:
Several threads are used in my project and I want to suspend certain threads in some conditions. I use following statements:

::GetExitCodeThread( pThread->hThread, &dwExitCode );
if( dwExitCode == STILL_ACTIVE ){
pThread->SuspendThread();
}
// pThread is the point to the thread

I have to make these statements act as one statement so that the thread will not quit and pThread is valid when "pThread->SuspendThread()" is executed.
Thanks in advance!

migel

Hi!
did you try ctritical sections or mutex (if your threads in different process)?

NickRepin

<<...the thread will not quit and pThread is
valid when "pThread->SuspendThread()" is executed>>

Looks like that pThread becomes invalid when the thread terminated. If so then your code is wrong in principle.

If the thread already exited then you cannot execute even ::GetExitCodeThread( pThread->hThread, &dwExitCode );

ASKER CERTIFIED SOLUTION

DanRollins

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NickRepin

DanRollins,

the original question does not say that pThread points to CWinThread. The questioner believes that pThread becomes invalid once the thread exited.

I meant to say that if this is true, then it makes no sense to call GetExitCodeThread() at all.

Lite

ASKER

Thanks, everyone. I'v found an alternative way to bypass this complicated problem. I think the question can be resovled using event and critical section. But I don't want to spend my time on it. :)