00001 /******************************************************************************* 00002 * Copyright (C) 2004 Vintela, Inc. All rights reserved. 00003 * Copyright (C) 2005 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 * 00011 * - Redistributions in binary form must reproduce the above copyright notice, 00012 * this list of conditions and the following disclaimer in the documentation 00013 * and/or other materials provided with the distribution. 00014 * 00015 * - Neither the name of Vintela, Inc., Novell, Inc., nor the names of its 00016 * contributors may be used to endorse or promote products derived from this 00017 * software without specific prior written permission. 00018 * 00019 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' 00020 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 00021 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 00022 * ARE DISCLAIMED. IN NO EVENT SHALL Vintela, Inc., Novell, Inc., OR THE 00023 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 00024 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 00025 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 00026 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 00027 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 00028 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 00029 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 00030 *******************************************************************************/ 00031 00032 00037 #ifndef BLOCXX_NON_RECURSIVE_MUTEXLOCK_HPP_INCLUDE_GUARD_ 00038 #define BLOCXX_NON_RECURSIVE_MUTEXLOCK_HPP_INCLUDE_GUARD_ 00039 #include "blocxx/BLOCXX_config.h" 00040 #include "blocxx/NonRecursiveMutex.hpp" 00041 #include <cassert> 00042 00043 namespace BLOCXX_NAMESPACE 00044 { 00045 00047 class BLOCXX_COMMON_API NonRecursiveMutexLock 00048 { 00049 public: 00050 explicit NonRecursiveMutexLock(NonRecursiveMutex& mutex, bool initially_locked=true) 00051 : m_mutex(&mutex), m_locked(false) 00052 { 00053 if (initially_locked) 00054 { 00055 lock(); 00056 } 00057 } 00058 ~NonRecursiveMutexLock() 00059 { 00060 try 00061 { 00062 if (m_locked) 00063 { 00064 release(); 00065 } 00066 } 00067 catch (...) 00068 { 00069 // don't let exceptions escape 00070 } 00071 } 00072 void lock() 00073 { 00074 assert(m_locked == false); 00075 m_mutex->acquire(); 00076 m_locked = true; 00077 } 00078 void release() 00079 { 00080 assert(m_locked == true); 00081 m_mutex->release(); 00082 m_locked = false; 00083 } 00084 NonRecursiveMutexLock(const NonRecursiveMutexLock& arg) 00085 : m_mutex(arg.m_mutex), m_locked(arg.m_locked) 00086 { 00087 arg.m_locked = false; 00088 } 00089 bool isLocked() const 00090 { 00091 return m_locked; 00092 } 00093 /* 00094 NonRecursiveMutexLock& operator= (const NonRecursiveMutexLock& arg) 00095 { 00096 release(); 00097 m_locked = arg.m_locked; 00098 m_mutex = arg.m_mutex; 00099 arg.m_locked = false; 00100 return *this; 00101 } 00102 */ 00103 private: 00104 NonRecursiveMutex* m_mutex; 00105 mutable bool m_locked; 00106 friend class Condition; 00107 }; 00108 00109 } // end namespace BLOCXX_NAMESPACE 00110 00111 #endif