forked from mia/Aegisub
79 lines
2.1 KiB
C++
79 lines
2.1 KiB
C++
// Copyright (c) 2010, Thomas Goyne <plorkyeran@aegisub.org>
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//
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// Permission to use, copy, modify, and distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice appear in all copies.
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//
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// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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//
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// $Id: scoped_ptr.h 153 2010-12-08 14:45:38Z verm $
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/// @file scoped_ptr.h
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/// @brief
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/// @ingroup libaegisub
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#pragma once
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namespace agi {
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/// @class scoped_ptr
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/// @brief auto_ptr without the transfer of ownership semantics
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template<class T>
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class scoped_ptr {
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T* ptr;
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scoped_ptr(scoped_ptr const&);
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scoped_ptr& operator=(scoped_ptr const&);
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typedef T *scoped_ptr<T>::*unspecified_bool_type;
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public:
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typedef T element_type;
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T& operator*() const {return *ptr; }
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T* operator->() const { return ptr; }
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T* get() const { return ptr; }
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operator unspecified_bool_type() const { return ptr ? &scoped_ptr<T>::ptr : 0; }
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void reset(T *p = 0) {
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delete ptr;
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ptr = p;
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}
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explicit scoped_ptr(T *ptr = 0) : ptr(ptr){ }
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~scoped_ptr() { delete ptr; }
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};
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/// A generic scoped holder for non-pointer handles
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template<class T, class Del = void(*)(T)>
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class scoped_holder {
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T value;
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Del destructor;
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scoped_holder(scoped_holder const&);
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scoped_holder& operator=(scoped_holder const&);
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public:
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operator T() const { return value; }
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T operator->() const { return value; }
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scoped_holder& operator=(T new_value) {
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if (value)
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destructor(value);
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value = new_value;
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return *this;
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}
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scoped_holder(T value, Del destructor)
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: value(value)
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, destructor(destructor)
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{
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}
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~scoped_holder() { if (value) destructor(value); }
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};
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}
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