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95 lines
1.7 KiB
C++
95 lines
1.7 KiB
C++
// ASE base library
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// Copyright (C) 2001-2011 David Capello
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//
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// This source file is ditributed under a BSD-like license, please
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// read LICENSE.txt for more information.
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#ifndef BASE_UNIQUE_PTR_H_INCLUDED
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#define BASE_UNIQUE_PTR_H_INCLUDED
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#include "base/disable_copying.h"
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// Default deleter used by unique pointers (it calls "delete" operator).
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template<class T>
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class DefaultUniquePtrDeleter
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{
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public:
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void operator()(T* ptr)
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{
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delete ptr;
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}
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};
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// Keeps the life time of the pointee object between the scope of the
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// UniquePtr instance.
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template<class T, class D = DefaultUniquePtrDeleter<T> >
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class UniquePtr
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{
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public:
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typedef T* pointer;
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typedef T element_type;
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typedef D deleter_type;
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UniquePtr()
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: m_ptr(pointer())
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{
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}
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// Constructor with default deleter.
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explicit UniquePtr(pointer ptr)
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: m_ptr(ptr)
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{
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}
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// Constructor with customized deleter.
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UniquePtr(pointer ptr, deleter_type deleter)
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: m_ptr(ptr)
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, m_deleter(deleter)
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{
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}
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// Releases one reference from the pointee.
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~UniquePtr()
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{
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if (m_ptr)
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m_deleter(m_ptr);
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}
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void reset(pointer ptr = pointer())
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{
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if (m_ptr)
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m_deleter(m_ptr);
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m_ptr = ptr;
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}
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void reset(pointer ptr, deleter_type deleter)
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{
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if (m_ptr)
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m_deleter(m_ptr);
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m_ptr = ptr;
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m_deleter = deleter;
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}
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pointer release()
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{
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pointer ptr(m_ptr);
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m_ptr = pointer();
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return ptr;
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}
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pointer get() const { return m_ptr; }
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element_type& operator*() const { return *m_ptr; }
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pointer operator->() const { return m_ptr; }
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operator pointer() const { return m_ptr; }
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private:
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pointer m_ptr; // The pointee object.
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deleter_type m_deleter; // The deleter.
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DISABLE_COPYING(UniquePtr);
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};
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#endif
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