94 lines
1.9 KiB
C++
94 lines
1.9 KiB
C++
#ifndef NOWIDE_SCOPED_PTR_HPP
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#define NOWIDE_SCOPED_PTR_HPP
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// (C) Copyright Greg Colvin and Beman Dawes 1998, 1999.
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// Copyright (c) 2001, 2002 Peter Dimov,
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// Copyright (C) 2012 Artyom Beilis
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//
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// Distributed under the Boost Software License, Version 1.0. (See
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// accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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//
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// http://www.boost.org/libs/smart_ptr/scoped_ptr.htm
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//
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#include <assert.h>
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namespace nowide
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{
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// scoped_ptr mimics a built-in pointer except that it guarantees deletion
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// of the object pointed to, either on destruction of the scoped_ptr or via
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// an explicit reset(). scoped_ptr is a simple solution for simple needs;
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// use shared_ptr or std::auto_ptr if your needs are more complex.
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template<class T> class scoped_ptr // noncopyable
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{
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private:
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T * px;
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scoped_ptr(scoped_ptr const &);
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scoped_ptr & operator=(scoped_ptr const &);
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typedef scoped_ptr<T> this_type;
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void operator==( scoped_ptr const& ) const;
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void operator!=( scoped_ptr const& ) const;
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public:
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typedef T element_type;
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explicit scoped_ptr( T * p = 0 ): px( p ) // never throws
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{
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}
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~scoped_ptr() // never throws
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{
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delete px;
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}
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void reset(T * p = 0) // never throws
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{
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assert( p == 0 || p != px ); // catch self-reset errors
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this_type(p).swap(*this);
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}
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T & operator*() const // never throws
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{
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assert( px != 0 );
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return *px;
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}
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T * operator->() const // never throws
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{
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assert( px != 0 );
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return px;
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}
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T * get() const // never throws
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{
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return px;
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}
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operator bool() const
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{
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return px!=0;
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}
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void swap(scoped_ptr & b) // never throws
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{
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T * tmp = b.px;
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b.px = px;
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px = tmp;
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}
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};
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} // namespace nowide
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#endif
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// vim: tabstop=4 expandtab shiftwidth=4 softtabstop=4
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