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102 lines
3.2 KiB
C++
102 lines
3.2 KiB
C++
//##################################################################################################
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//
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// Custom Visualization Core library
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// Copyright (C) 2011-2013 Ceetron AS
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//
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// This library may be used under the terms of either the GNU General Public License or
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// the GNU Lesser General Public License as follows:
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//
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// GNU General Public License Usage
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// This library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful, but WITHOUT ANY
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// WARRANTY; without even the implied warranty of MERCHANTABILITY or
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// FITNESS FOR A PARTICULAR PURPOSE.
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//
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// See the GNU General Public License at <<http://www.gnu.org/licenses/gpl.html>>
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// for more details.
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//
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// GNU Lesser General Public License Usage
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// This library is free software; you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation; either version 2.1 of the License, or
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// (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful, but WITHOUT ANY
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// WARRANTY; without even the implied warranty of MERCHANTABILITY or
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// FITNESS FOR A PARTICULAR PURPOSE.
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//
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// See the GNU Lesser General Public License at <<http://www.gnu.org/licenses/lgpl-2.1.html>>
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// for more details.
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//
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//##################################################################################################
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#pragma once
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#include <omp.h>
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namespace caf
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{
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//==================================================================================================
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/// OpenMP mutex definition
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/// Taken from http://bisqwit.iki.fi/story/howto/openmp/
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//==================================================================================================
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class MutexType
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{
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public:
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MutexType() { omp_init_lock( &m_lock ); }
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~MutexType() { omp_destroy_lock( &m_lock ); }
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void lock() { omp_set_lock( &m_lock ); }
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void unlock() { omp_unset_lock( &m_lock ); }
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MutexType( const MutexType& ) { omp_init_lock( &m_lock ); }
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MutexType& operator=( const MutexType& ) { return *this; }
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private:
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omp_lock_t m_lock;
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};
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//==================================================================================================
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/// OpenMP scoped lock on a mutex
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/// Taken from http://bisqwit.iki.fi/story/howto/openmp/
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//==================================================================================================
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class ScopedLock
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{
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public:
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explicit ScopedLock( MutexType& m )
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: m_mutex( m )
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, m_locked( true )
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{
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m_mutex.lock();
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}
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~ScopedLock() { unlock(); }
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void unlock()
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{
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if ( !m_locked ) return;
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m_locked = false;
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m_mutex.unlock();
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}
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void lockAgain()
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{
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if ( m_locked ) return;
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m_mutex.lock();
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m_locked = true;
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}
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private:
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MutexType& m_mutex;
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bool m_locked;
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private: // prevent copying the scoped lock.
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void operator=( const ScopedLock& );
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ScopedLock( const ScopedLock& );
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};
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} // namespace caf
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