Re: Thread deadlock misery

The real error is not in the GetTickCount() overflow. It's safe to calculate
elapsed time by subtracting it. It's NOT safe to just compare it.

The real error is that dwSleepTime is NEVER negative. If the execution is
behind, dwSleepTime is very big positive number, and the thread will sleep
pretty much forever.

"Ben Voigt" <rbv@xxxxxxxxxxxxx> wrote in message
news:O3SSkjYZHHA.3272@xxxxxxxxxxxxxxxxxxxxxxx
InterlockedIncrement( &pParent->m_nSentFrames );
DWORD dwSleepTime = ( 1000 / pATFP->TFP.FPS ) -
( GetTickCount() - dwStartTime );
if( dwSleepTime > 0 )
Sleep( dwSleepTime );

What happens when GetTickCount() overflows back to zero? Also, you're
accounting for the delay in your processing, but not the variation in
Sleep times, so your overall transmit rate is lower than you think. Use a
waitable timer instead.



.

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