RE: [Boost-Users] detail/lightweight_mutex.hpp

From: Tom Matelich (tmatelich_at_[hidden])
Date: 2002-08-16 10:28:05

> From: Tom Matelich [mailto:tmatelich_at_[hidden]]
> > From: Peter Dimov [mailto:pdimov_at_[hidden]]
> > From: "Tom Matelich" <tmatelich_at_[hidden]>
> > > I'm attempting to go to Boost 1.28 on our HPUX 10.20 boxes. 
> >  I've run into
> > a
> > > problem with an assumption about the type of pthread_mutexattr_t.
> > > detail\lwm_pthreads.hpp calls:
> > >
> > >         pthread_mutex_init(&m_, 0);
> > >
> > > HP's pthread.h (10.20 uses DCE) has that defined as:
> > >
> > > int pthread_mutex_init  (pthread_mutex_t *,pthread_mutexattr_t);
> > 
> > I don't know what to do about it. My POSIX draft says
> > 
> > int pthread_mutex_init(pthread_mutex_t *restrict mutex, const
> > pthread_mutexattr_t *restrict attr);
> > 
> > and goes on to specify that 0/NULL for the second argument 
> > causes default
> > attributes to be used.
> > 
> > I know little - if anything - about HPUX 10.20; if you find a 
> > solution let
> > me know, and I'll incorporate it into lwm_pthreads.hpp. Sorry.
> > 
> 
> The dce documentation I see says to use pthread_mutexattr_default.
>
http://www.transarc.ibm.com/Library/documentation/dce/1.1/pthread_mutex_init
.html
>
>So, it looks like I need to find a version to if or ifdef off of.

I found a define in dce/cma.h (appended to my original email) which seems to
fit the bill:

/*
 * Define a symbol which client code can test to determine whether the 
 * underlying threads package is DECthreads or not.  This is especially
 * important to clients of the Pthreads interface who may want to use
 * certain DECthreads extensions, such as the global lock and non-real-time
 * scheduling policies, on the DECthreads platform while maintaining 
 * portability to a "vanilla" pthreads implementation.
 */
#define _DECTHREADS_	1

Although, I'm not sure how to find out if this should be used generally, or
only on HP.

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