lock_guard.hh Go to the documentation of this file. // // $Id: lock_guard.hh,v 1.5 2003/10/30 15:05:12 cholm Exp $ // // threadmm::lock_guard // Copyright (C) 2002 Christian Holm Christensen <cholm@nbi.dk> // // This library is free software; you can redistribute it and/or // modify it under the terms of the GNU Lesser General Public License // as published by the Free Software Foundation; either version 2.1 // of the License, or (at your option) any later version. // // This library is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU // Lesser General Public License for more details. // // You should have received a copy of the GNU Lesser General Public // License along with this library; if not, write to the Free // Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA // 02111-1307 USA // #ifndef THREADMM_lock_guard #define THREADMM_lock_guard namespace threadmm { template <typename Lock> class lock_guard { public: typedef Lock lock_type; protected: lock_type& _lock; bool _released; public: lock_guard(lock_type& l, bool spin=false) : _lock(l) { this->lock(spin); this->_released = false; } lock_guard(volatile lock_type& l, bool spin=false) : _lock(const_cast<Lock&>(l)) { this->lock(spin); this->_released = false; } virtual ~lock_guard() { if (!this->_released) this->unlock(); } void lock(bool spin=false); void lock(bool spin=false) volatile; void unlock() { this->_released = true; this->_lock.unlock(); } }; template <typename Lock> void lock_guard<Lock>::lock(bool spin) { if (!spin) this->_lock.lock(); else while (!this->_lock.try_lock()); } #if 0 template <typename Lock> void lock_guard<Lock>::lock(bool spin) volatile { Lock* tmp = const_cast<Lock*>(&_lock); if (!spin) this->tmp->lock(); else while (!this->tmp.try_lock()); } #endif } #endif //____________________________________________________________________ // // EOF //