94 lines
2.3 KiB
C++
94 lines
2.3 KiB
C++
/*
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Copyright (c) 2009-2010 Christopher A. Taylor. All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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* Neither the name of LibCat nor the names of its contributors may be used
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to endorse or promote products derived from this software without
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specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef CAT_RW_LOCK_HPP
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#define CAT_RW_LOCK_HPP
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#include <cat/threads/Mutex.hpp>
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namespace cat {
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//// RWLock
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class RWLock
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{
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#if defined(CAT_OS_WINDOWS)
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volatile u32 _rd_count;
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volatile u32 _wr_count;
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HANDLE _rd_event;
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Mutex _wr_lock;
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#else
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int init_failure;
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pthread_rwlock_t rw;
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#endif
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public:
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RWLock();
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~RWLock();
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void ReadLock();
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void ReadUnlock();
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void WriteLock();
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void WriteUnlock();
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};
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//// AutoReadLock
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class AutoReadLock
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{
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RWLock *_lock;
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public:
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AutoReadLock(RWLock &lock);
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~AutoReadLock();
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bool Release();
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};
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//// AutoWriteLock
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class AutoWriteLock
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{
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RWLock *_lock;
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public:
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AutoWriteLock(RWLock &lock);
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~AutoWriteLock();
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bool Release();
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};
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} // namespace cat
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#endif // CAT_RW_LOCK_HPP
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