blocxx
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00001 /******************************************************************************* 00002 * Copyright (C) 2005, Vintela, Inc. All rights reserved. 00003 * Copyright (C) 2006, Novell, Inc. All rights reserved. 00004 * 00005 * Redistribution and use in source and binary forms, with or without 00006 * modification, are permitted provided that the following conditions are met: 00007 * 00008 * * Redistributions of source code must retain the above copyright notice, 00009 * this list of conditions and the following disclaimer. 00010 * * Redistributions in binary form must reproduce the above copyright 00011 * notice, this list of conditions and the following disclaimer in the 00012 * documentation and/or other materials provided with the distribution. 00013 * * Neither the name of 00014 * Vintela, Inc., 00015 * nor Novell, Inc., 00016 * nor the names of its contributors or employees may be used to 00017 * endorse or promote products derived from this software without 00018 * specific prior written permission. 00019 * 00020 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 00021 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 00022 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 00023 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 00024 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 00025 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 00026 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 00027 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 00028 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 00029 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 00030 * POSSIBILITY OF SUCH DAMAGE. 00031 *******************************************************************************/ 00032 00033 00038 #ifndef BLOCXX_NON_RECURSIVE_MUTEXLOCK_HPP_INCLUDE_GUARD_ 00039 #define BLOCXX_NON_RECURSIVE_MUTEXLOCK_HPP_INCLUDE_GUARD_ 00040 #include "blocxx/BLOCXX_config.h" 00041 #include "blocxx/NonRecursiveMutex.hpp" 00042 #include <cassert> 00043 00044 namespace BLOCXX_NAMESPACE 00045 { 00046 00048 00052 class BLOCXX_COMMON_API NonRecursiveMutexLock 00053 { 00054 public: 00058 explicit NonRecursiveMutexLock(NonRecursiveMutex& mutex, bool initially_locked=true) 00059 : m_mutex(&mutex), m_locked(false) 00060 { 00061 if (initially_locked) 00062 { 00063 lock(); 00064 } 00065 } 00066 ~NonRecursiveMutexLock() 00067 { 00068 try 00069 { 00070 if (m_locked) 00071 { 00072 release(); 00073 } 00074 } 00075 catch (...) 00076 { 00077 // don't let exceptions escape 00078 } 00079 } 00084 void lock() 00085 { 00086 assert(m_locked == false); 00087 m_mutex->acquire(); 00088 m_locked = true; 00089 } 00094 void release() 00095 { 00096 assert(m_locked == true); 00097 m_mutex->release(); 00098 m_locked = false; 00099 } 00103 NonRecursiveMutexLock(const NonRecursiveMutexLock& arg) 00104 : m_mutex(arg.m_mutex), m_locked(arg.m_locked) 00105 { 00106 arg.m_locked = false; 00107 } 00111 bool isLocked() const 00112 { 00113 return m_locked; 00114 } 00115 /* 00116 NonRecursiveMutexLock& operator= (const NonRecursiveMutexLock& arg) 00117 { 00118 release(); 00119 m_locked = arg.m_locked; 00120 m_mutex = arg.m_mutex; 00121 arg.m_locked = false; 00122 return *this; 00123 } 00124 */ 00125 private: 00126 NonRecursiveMutex* m_mutex; 00127 mutable bool m_locked; 00128 friend class Condition; 00129 }; 00130 00131 } // end namespace BLOCXX_NAMESPACE 00132 00133 #endif