Subj : Re: Optimization to Jeffrey Richter's COptex (Windows)?
To   : comp.programming.threads
From : SenderX
Date : Thu Jan 27 2005 10:49 pm

YeoW!

>    LONG wake( volatile LPLONG dest,
>               LONG signals )
>    {
>        {
>            mutex::guard lock( m_mutex );
>
>            if ( m_waiters > 0 )
>            {
>                if ( m_waiters >= signals )
>                {
>                    m_waiters -= signals;
>                }
>
>                else
>                {
>                    signals = m_waiters;
>                    m_waiters = 0;
>                }
>            }


This has to be here:


             else { signals = 0; }
             ^^^^^^^^^^^^^^^^^^^^^



>
>            if ( m_waiters ) { InterlockedBTS( dest, 0x80000000 ); }
>        }
>
>        if ( signals )
>        {
>            if ( ! ReleaseSemaphore( m_queue, signals, 0 ) )
>            {
>                throw;
>            }
>        }
>
>        return signals;
>    }

.