[boost] Re: no semaphores in boost::thread

From: Alexander Terekhov (terekhov_at_[hidden])
Date: 2003-07-07 06:09:34

Jon Biggar wrote:
[...]
> There is actually one case that needs a semaphore that has no reasonable
> alternative in pthreads.  The only pthread synchronization operation
> that is asynch-reentrant safe (i.e. can be called from a signal handler)
> is signaling a pthread semaphore.

There's no such thing as "a pthread semaphore". In a *threaded* POSIX 
program you can use sigwait() and/or SIGEV_THREAD delivery. 

> 
> It would be nice if there was some abstraction available in boost
> threads that used this mechanism internally to get the needed behavior,
> but encapsulated to hide the error-proneness of a raw semaphore.

Well, http://www.mail-archive.com/[e-mail]/msg07519.html

regards,
alexander.

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