From: Hugh Sasse Staff Elec Eng <hgs@...>
Date: 2002-09-24T00:27:22+09:00
Subject: Re: Avoiding busy waiting

On Sun, 22 Sep 2002, Harry Ohlsen wrote:

> My original thought was to use a ConditionVariable.  Ie, when the consumer
> thread finds that the length of the queue is currently zero it then does a
> wait on a ConditionVariable, using the mutex that's guarding the queue.

The solution I saw in
    Concurrent Programming
    C. R. Snow
    Cambridge University Press, 1992
    ISBN: 0521327962
used two condition variables, basically: read_to_read, and
read_to_write.  I've seen it elsewhere too.

> Thanks in advance,
>
> Harry O.
>
        Hugh
>