[boost] boost threads: pthread mutex priority inheritance

Subject: [boost] boost threads: pthread mutex priority inheritance
From: Jason Newton (nevion_at_[hidden])
Date: 2011-07-27 19:48:42

Hi,

I just discovered today that pthread mutex's aren't guaranteed to do
priority inheritance unless PTHREAD_PRIO_INHERIT is set.  I'm doing a bunch
of soft-rt work with SCHED_RR so priority inheritance on shared resources is
a given necessity.

But how should this be worked into boost mutex?  There's no way of
constructing a boost mutex from an existing object, nor anyway of setting
mutex attributes used inside the ctor.  There's also no way of manipulating
the mutex attributes after pthread_mutex_init.

For the moment, the few lines that compose the mutex class are easily copied
so that I can do my own business inside the constructor but I expect others
will run into this problem down the line and this solution is a bit
unsavory.  Any better advice?