Subj : Re: reliability of setting thread priority
To   : comp.programming.threads
From : David Schwartz
Date : Fri Feb 25 2005 11:47 am


<gottlobfrege@gmail.com> wrote in message 
news:1109335689.042110.211170@f14g2000cwb.googlegroups.com...

>>     Your global static mutex doesn't need to be created.

> Sorry, I'm obviously missing something in your meaning - if the mutex
> doesn't "exist" what good is it to me?  What do you mean 'created'?
> initted? something else?  In Win32 I'm talking about calling
> CreateMutex().

    Consider:

int i=0;

    There is no time when this integer doesn't exist, so long as code that 
can access it is running.

> I could wait and call CreateMutex() during the first usage, but then
> I'm back to needing a flag/exchange to protect that, and it starts to
> seem no better than what I already have.

    What you need is a mutex or critical section that is initialized by 
copying static data onto it. Essentially, you need pthread_once.

    DS

.