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removing old trunk files

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Aleksandar Fabijanic
2012-04-23 00:43:14 +00:00
parent 2ce14cafb5
commit f9b60296f7
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179
Foundation/include/Poco/ThreadLocal.h
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//
// ThreadLocal.h
//
// $Id: //poco/1.4/Foundation/include/Poco/ThreadLocal.h#1 $
//
// Library: Foundation
// Package: Threading
// Module: Thread
//
// Definition of the ThreadLocal template and related classes.
//
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// Permission is hereby granted, free of charge, to any person or organization
// obtaining a copy of the software and accompanying documentation covered by
// this license (the "Software") to use, reproduce, display, distribute,
// execute, and transmit the Software, and to prepare derivative works of the
// Software, and to permit third-parties to whom the Software is furnished to
// do so, all subject to the following:
//
// The copyright notices in the Software and this entire statement, including
// the above license grant, this restriction and the following disclaimer,
// must be included in all copies of the Software, in whole or in part, and
// all derivative works of the Software, unless such copies or derivative
// works are solely in the form of machine-executable object code generated by
// a source language processor.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
//
#ifndef Foundation_ThreadLocal_INCLUDED
#define Foundation_ThreadLocal_INCLUDED
#include "Poco/Foundation.h"
#include <map>
namespace Poco {
class Foundation_API TLSAbstractSlot
/// This is the base class for all objects
/// that the ThreadLocalStorage class manages.
{
public:
TLSAbstractSlot();
virtual ~TLSAbstractSlot();
};
template <class C>
class TLSSlot: public TLSAbstractSlot
/// The Slot template wraps another class
/// so that it can be stored in a ThreadLocalStorage
/// object. This class is used internally, and you
/// must not create instances of it yourself.
{
public:
TLSSlot():
_value()
{
}
~TLSSlot()
{
}
C& value()
{
return _value;
}
private:
TLSSlot(const TLSSlot&);
TLSSlot& operator = (const TLSSlot&);
C _value;
};
class Foundation_API ThreadLocalStorage
/// This class manages the local storage for each thread.
/// Never use this class directly, always use the
/// ThreadLocal template for managing thread local storage.
{
public:
ThreadLocalStorage();
/// Creates the TLS.
~ThreadLocalStorage();
/// Deletes the TLS.
TLSAbstractSlot*& get(const void* key);
/// Returns the slot for the given key.
static ThreadLocalStorage& current();
/// Returns the TLS object for the current thread
/// (which may also be the main thread).
static void clear();
/// Clears the current thread's TLS object.
/// Does nothing in the main thread.
private:
typedef std::map<const void*, TLSAbstractSlot*> TLSMap;
TLSMap _map;
friend class Thread;
};
template <class C>
class ThreadLocal
/// This template is used to declare type safe thread
/// local variables. It can basically be used like
/// a smart pointer class with the special feature
/// that it references a different object
/// in every thread. The underlying object will
/// be created when it is referenced for the first
/// time.
/// See the NestedDiagnosticContext class for an
/// example how to use this template.
/// Every thread only has access to its own
/// thread local data. There is no way for a thread
/// to access another thread's local data.
{
typedef TLSSlot<C> Slot;
public:
ThreadLocal()
{
}
~ThreadLocal()
{
}
C* operator -> ()
{
return &get();
}
C& operator * ()
/// "Dereferences" the smart pointer and returns a reference
/// to the underlying data object. The reference can be used
/// to modify the object.
{
return get();
}
C& get()
/// Returns a reference to the underlying data object.
/// The reference can be used to modify the object.
{
TLSAbstractSlot*& p = ThreadLocalStorage::current().get(this);
if (!p) p = new Slot;
return static_cast<Slot*>(p)->value();
}
private:
ThreadLocal(const ThreadLocal&);
ThreadLocal& operator = (const ThreadLocal&);
};
} // namespace Poco
#endif // Foundation_ThreadLocal_INCLUDED