73 lines
1.8 KiB
C++
73 lines
1.8 KiB
C++
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/*
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Sync - generic helper for object based locking and synchronisation
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Copyright (C) Lumiera.org
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2011, Hermann Vosseler <Ichthyostega@web.de>
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of
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the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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* *****************************************************/
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/** @file sync.cpp
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** This compilation unit holds the static attribute struct
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** for initialising pthread's recursive mutex.
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**
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*/
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#include "lib/sync.hpp"
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namespace lib {
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namespace sync {
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namespace { // private pthread attributes
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pthread_mutexattr_t attribute_;
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pthread_once_t is_init_ = PTHREAD_ONCE_INIT;
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void
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initAttribute()
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{
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pthread_mutexattr_init (&attribute_);
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pthread_mutexattr_settype (&attribute_, PTHREAD_MUTEX_RECURSIVE);
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}
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inline pthread_mutexattr_t*
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recursive_flag()
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{
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pthread_once (&is_init_, initAttribute);
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return &attribute_;
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}
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}
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/**
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* @internal creating a recursive mutex.
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* Defined here in a separate compilation unit,
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* so it can refer to a single mutex attribute flag.
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*/
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Wrapped_RecursiveMutex::Wrapped_RecursiveMutex()
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{
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pthread_mutex_init (&mutex_, recursive_flag());
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}
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}}// lib::sync
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