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Re: pthread_mutex_t initializer idiom

From: "Peter Dimov" <pdimov at mmltd dot net>
To: "Benjamin Kosnik" <bkoz at redhat dot com>, <libstdc++ at gcc dot gnu dot org>
Date: Fri, 8 Sep 2006 14:10:41 +0300
Subject: Re: pthread_mutex_t initializer idiom
References: <20060908115540.d2bf38a1.bkoz@redhat.com>

Benjamin Kosnik wrote:

I'm still trying to unify some of the atomics and concurrency code,
and remove duplicates.
I see this idiom a lot:
  __gthread_mutex_t temp = __GTHREAD_MUTEX_INIT;
  _M_mutex = temp;
Can somebody explain to me why we are doing this instead of:

_M_mutex = __GTHREAD_MUTEX_INIT;

?

It is presumably to cover the case where __GTHREAD_MUTEX_INIT expands to something like { 0, 0 }.

Follow-Ups:
- Re: pthread_mutex_t initializer idiom
  - From: Paolo Carlini

References:
- pthread_mutex_t initializer idiom
  - From: Benjamin Kosnik

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