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SmartPtr.hpp</title>
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<span class=comment>// file : Utility/ReferenceCounting/SmartPtr.hpp
// author : Boris Kolpackov <boris@kolpackov.net>
// copyright : Copyright (c) 2002-2003 Boris Kolpackov
// license : http://kolpackov.net/license.html
</span><span class=keyword>namespace </span><span class=identifier>Utility
</span><span class=special>{
</span><span class=keyword>namespace </span><span class=identifier>ReferenceCounting
</span><span class=special>{
</span><span class=keyword>template </span><span class=special><</span><span class=keyword>typename </span><span class=identifier>T</span><span class=special>>
</span><span class=keyword>class </span><span class=identifier>SmartPtr
</span><span class=special>{
</span><span class=keyword>public</span><span class=special>:
</span><span class=keyword>typedef
</span><span class=identifier>T
</span><span class=identifier>Type</span><span class=special>;
</span><span class=keyword>class </span><span class=identifier>NotInitialized_ </span><span class=special>{};
</span><span class=keyword>typedef
</span><span class=identifier>ExH</span><span class=special>::</span><span class=identifier>Compound</span><span class=special><</span><span class=identifier>NotInitialized_</span><span class=special>, </span><span class=identifier>ExH</span><span class=special>::</span><span class=identifier>Logic</span><span class=special>::</span><span class=identifier>DescriptiveException</span><span class=special>>
</span><span class=identifier>NotInitialized</span><span class=special>;
</span><span class=keyword>public</span><span class=special>:
</span><span class=comment>// c-tor's
</span><span class=identifier>SmartPtr </span><span class=special>() </span><span class=keyword>throw </span><span class=special>();
</span><span class=identifier>SmartPtr </span><span class=special>(</span><span class=identifier>Type</span><span class=special>* </span><span class=identifier>ptr</span><span class=special>) </span><span class=keyword>throw </span><span class=special>();
</span><span class=identifier>SmartPtr </span><span class=special>(</span><span class=identifier>SmartPtr</span><span class=special><</span><span class=identifier>Type</span><span class=special>> </span><span class=keyword>const</span><span class=special>& </span><span class=identifier>s_ptr</span><span class=special>)
</span><span class=keyword>throw </span><span class=special>(</span><span class=identifier>Interface</span><span class=special>::</span><span class=identifier>Exception</span><span class=special>, </span><span class=identifier>Interface</span><span class=special>::</span><span class=identifier>SystemException</span><span class=special>);
</span><span class=keyword>template </span><span class=special><</span><span class=keyword>typename </span><span class=identifier>Other</span><span class=special>>
</span><span class=identifier>SmartPtr </span><span class=special>(</span><span class=identifier>SmartPtr</span><span class=special><</span><span class=identifier>Other</span><span class=special>> </span><span class=keyword>const</span><span class=special>& </span><span class=identifier>s_ptr</span><span class=special>)
</span><span class=keyword>throw </span><span class=special>(</span><span class=identifier>Interface</span><span class=special>::</span><span class=identifier>Exception</span><span class=special>, </span><span class=identifier>Interface</span><span class=special>::</span><span class=identifier>SystemException</span><span class=special>);
</span><span class=comment>// d-tor
</span><span class=special>~</span><span class=identifier>SmartPtr </span><span class=special>() </span><span class=keyword>throw </span><span class=special>();
</span><span class=comment>// assignment & copy-assignment operators
</span><span class=identifier>SmartPtr</span><span class=special><</span><span class=identifier>Type</span><span class=special>>&
</span><span class=keyword>operator</span><span class=special>= </span><span class=special>(</span><span class=identifier>Type</span><span class=special>* </span><span class=identifier>ptr</span><span class=special>) </span><span class=keyword>throw </span><span class=special>();
</span><span class=identifier>SmartPtr</span><span class=special><</span><span class=identifier>Type</span><span class=special>>&
</span><span class=keyword>operator</span><span class=special>= </span><span class=special>(</span><span class=identifier>SmartPtr</span><span class=special><</span><span class=identifier>Type</span><span class=special>> </span><span class=keyword>const</span><span class=special>& </span><span class=identifier>s_ptr</span><span class=special>)
</span><span class=keyword>throw </span><span class=special>(</span><span class=identifier>Interface</span><span class=special>::</span><span class=identifier>Exception</span><span class=special>, </span><span class=identifier>Interface</span><span class=special>::</span><span class=identifier>SystemException</span><span class=special>);
</span><span class=keyword>template </span><span class=special><</span><span class=keyword>typename </span><span class=identifier>Other</span><span class=special>>
</span><span class=identifier>SmartPtr</span><span class=special><</span><span class=identifier>Type</span><span class=special>>&
</span><span class=keyword>operator</span><span class=special>= </span><span class=special>(</span><span class=identifier>SmartPtr</span><span class=special><</span><span class=identifier>Other</span><span class=special>> </span><span class=keyword>const</span><span class=special>& </span><span class=identifier>s_ptr</span><span class=special>)
</span><span class=keyword>throw </span><span class=special>(</span><span class=identifier>Interface</span><span class=special>::</span><span class=identifier>Exception</span><span class=special>, </span><span class=identifier>Interface</span><span class=special>::</span><span class=identifier>SystemException</span><span class=special>);
</span><span class=comment>//conversions
</span><span class=keyword>operator </span><span class=identifier>Type</span><span class=special>* </span><span class=special>() </span><span class=keyword>const </span><span class=keyword>throw </span><span class=special>();
</span><span class=comment>// accessors
</span><span class=identifier>Type</span><span class=special>*
</span><span class=keyword>operator</span><span class=special>-> </span><span class=special>() </span><span class=keyword>const </span><span class=keyword>throw </span><span class=special>(</span><span class=identifier>NotInitialized</span><span class=special>);
</span><span class=identifier>Type</span><span class=special>*
</span><span class=identifier>in </span><span class=special>() </span><span class=keyword>const </span><span class=keyword>throw </span><span class=special>();
</span><span class=identifier>Type</span><span class=special>*
</span><span class=identifier>retn</span><span class=special>() </span><span class=keyword>throw </span><span class=special>();
</span><span class=keyword>private</span><span class=special>:
</span><span class=identifier>Type</span><span class=special>* </span><span class=identifier>ptr_</span><span class=special>;
</span><span class=special>};
</span><span class=comment>// Specialization of add_ref function for SmartPtr<T>
</span><span class=keyword>template </span><span class=special><</span><span class=keyword>typename </span><span class=identifier>T</span><span class=special>>
</span><span class=identifier>T</span><span class=special>*
</span><span class=identifier>add_ref </span><span class=special>(</span><span class=identifier>SmartPtr</span><span class=special><</span><span class=identifier>T</span><span class=special>> </span><span class=keyword>const</span><span class=special>& </span><span class=identifier>ptr</span><span class=special>)
</span><span class=keyword>throw </span><span class=special>(</span><span class=identifier>Interface</span><span class=special>::</span><span class=identifier>Exception</span><span class=special>, </span><span class=identifier>Interface</span><span class=special>::</span><span class=identifier>SystemException</span><span class=special>);
</span><span class=comment>// Dynamic type conversion function for SmartPtr's
</span><span class=keyword>template </span><span class=special><</span><span class=keyword>typename </span><span class=identifier>D</span><span class=special>, </span><span class=keyword>typename </span><span class=identifier>S</span><span class=special>>
</span><span class=identifier>D</span><span class=special>*
</span><span class=identifier>smart_cast </span><span class=special>(</span><span class=identifier>SmartPtr</span><span class=special><</span><span class=identifier>S</span><span class=special>> </span><span class=keyword>const</span><span class=special>& </span><span class=identifier>s</span><span class=special>)
</span><span class=keyword>throw </span><span class=special>(</span><span class=identifier>Interface</span><span class=special>::</span><span class=identifier>Exception</span><span class=special>, </span><span class=identifier>Interface</span><span class=special>::</span><span class=identifier>SystemException</span><span class=special>);
</span><span class=comment>// Acquisition function
</span><span class=keyword>template </span><span class=special><</span><span class=keyword>typename </span><span class=identifier>T</span><span class=special>>
</span><span class=identifier>SmartPtr</span><span class=special><</span><span class=identifier>T</span><span class=special>>
</span><span class=identifier>acquire </span><span class=special>(</span><span class=identifier>T</span><span class=special>* </span><span class=identifier>ptr</span><span class=special>) </span><span class=keyword>throw </span><span class=special>(</span><span class=identifier>Interface</span><span class=special>::</span><span class=identifier>Exception</span><span class=special>, </span><span class=identifier>Interface</span><span class=special>::</span><span class=identifier>SystemException</span><span class=special>);
</span><span class=special>}
</span><span class=special>}
</span></pre>
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