blocxx
|
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 #include "blocxx/BLOCXX_config.h" 00039 #include "blocxx/RWLocker.hpp" 00040 #include "blocxx/ThreadImpl.hpp" 00041 00042 namespace BLOCXX_NAMESPACE 00043 { 00044 00045 BLOCXX_DEFINE_EXCEPTION_WITH_ID(RWLocker); 00046 00047 inline bool RWLocker::ThreadComparer::operator()(Thread_t x, Thread_t y) const 00048 { 00049 #ifdef BLOCXX_NCR 00050 return !ThreadImpl::sameThreads(x, y) && (cma_thread_get_unique(&x) < cma_thread_get_unique(&y)); 00051 #else 00052 return !ThreadImpl::sameThreads(x, y) && x < y; 00053 #endif 00054 } 00055 00057 RWLocker::RWLocker() 00058 { 00059 } 00061 RWLocker::~RWLocker() 00062 { 00063 } 00065 void 00066 RWLocker::getReadLock(UInt32 sTimeout, UInt32 usTimeout) 00067 { 00068 getReadLock(Timeout::relative(sTimeout + static_cast<float>(usTimeout) * 1000000.0)); 00069 } 00070 00072 void 00073 RWLocker::getReadLock(const Timeout& timeout) 00074 { 00075 Thread_t tid = ThreadImpl::currentThread(); 00076 m_impl.acquireReadLock(tid, timeout); 00077 } 00078 00080 void 00081 RWLocker::releaseReadLock() 00082 { 00083 Thread_t tid = ThreadImpl::currentThread(); 00084 try 00085 { 00086 m_impl.releaseReadLock(tid); 00087 } 00088 catch (GenericRWLockImplException& e) 00089 { 00090 BLOCXX_THROW_SUBEX(RWLockerException, "Cannot release a read lock when no read lock is held", e); 00091 } 00092 } 00093 00095 void 00096 RWLocker::getWriteLock(UInt32 sTimeout, UInt32 usTimeout) 00097 { 00098 getWriteLock(Timeout::relative(sTimeout + static_cast<float>(usTimeout) * 1000000.0)); 00099 } 00101 void 00102 RWLocker::getWriteLock(const Timeout& timeout) 00103 { 00104 Thread_t tid = ThreadImpl::currentThread(); 00105 m_impl.acquireWriteLock(tid, timeout); 00106 } 00107 00109 void 00110 RWLocker::releaseWriteLock() 00111 { 00112 Thread_t tid = ThreadImpl::currentThread(); 00113 try 00114 { 00115 m_impl.releaseWriteLock(tid); 00116 } 00117 catch (GenericRWLockImplException& e) 00118 { 00119 BLOCXX_THROW_SUBEX(RWLockerException, "Cannot release a write lock when no write lock is held", e); 00120 } 00121 } 00122 00123 } // end namespace BLOCXX_NAMESPACE 00124