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108 lines
2.8 KiB
C++
108 lines
2.8 KiB
C++
/*
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* Copyright (c) 2005, Eric Crahen
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is furnished
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* to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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*/
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#ifndef __ZTTHREADLOCALIMPL_H__
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#define __ZTTHREADLOCALIMPL_H__
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#include "zthread/CountedPtr.h"
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namespace ZThread {
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/**
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* @class ThreadLocalImpl
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* @author Eric Crahen <http://www.code-foo.com>
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* @date <2003-07-27T10:23:19-0400>
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* @version 2.3.0
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*
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* @see ThreadLocal
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*/
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class ZTHREAD_API ThreadLocalImpl : private NonCopyable {
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public:
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class Value;
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typedef CountedPtr<Value, size_t> ValuePtr;
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//!
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class Value {
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Value& operator=(const Value&);
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public:
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virtual ~Value() {}
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virtual bool isInheritable() const = 0;
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virtual ValuePtr clone() const = 0;
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};
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//! Create a ThreadLocalImpl
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ThreadLocalImpl();
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//! Destroy a ThreadLocalImpl
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~ThreadLocalImpl();
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/**
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* @class InitialValueFn
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*/
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template <typename T>
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struct InitialValueFn {
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T operator()() { return T(); }
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};
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/**
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* @class ChildValueFn
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*/
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struct ChildValueFn {
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template <typename T>
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T operator()(const T& value) { return T(value); }
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};
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/**
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* @class UniqueChildValueFn
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*/
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struct UniqueChildValueFn : public ChildValueFn { };
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/**
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* @class InheritableValueFn
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*/
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struct InheritableValueFn {
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template <typename T>
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bool operator()(const T&) { return true; }
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bool operator()(const UniqueChildValueFn&) { return false; }
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};
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protected:
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//! Get the Value for the current thread
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ValuePtr value( ValuePtr (*pfn)() ) const;
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//! Clear any value set for this thread
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void clear() const;
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//! Clear any value set with any ThreadLocal for this thread
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static void clearAll();
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};
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} // __ZTTHREADLOCALIMPL_H__
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#endif
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