forked from boostorg/smart_ptr
108 lines
2.5 KiB
C++
108 lines
2.5 KiB
C++
#ifndef BOOST_SMART_PTR_SCOPED_ARRAY_HPP_INCLUDED
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#define BOOST_SMART_PTR_SCOPED_ARRAY_HPP_INCLUDED
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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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//
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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_array.htm
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//
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#include <boost/assert.hpp>
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#include <boost/checked_delete.hpp>
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#include <boost/config.hpp> // in case ptrdiff_t not in std
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#include <boost/detail/workaround.hpp>
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#include <cstddef> // for std::ptrdiff_t
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namespace boost
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{
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// Debug hooks
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#if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
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void sp_array_constructor_hook(void * p);
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void sp_array_destructor_hook(void * p);
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#endif
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// scoped_array extends scoped_ptr to arrays. Deletion of the array pointed to
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// is guaranteed, either on destruction of the scoped_array or via an explicit
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// reset(). Use shared_array or std::vector if your needs are more complex.
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template<class T> class scoped_array // noncopyable
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{
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private:
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T * px;
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scoped_array(scoped_array const &);
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scoped_array & operator=(scoped_array const &);
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typedef scoped_array<T> this_type;
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void operator==( scoped_array const& ) const;
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void operator!=( scoped_array const& ) const;
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public:
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typedef T element_type;
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explicit scoped_array( T * p = 0 ) : px( p ) // never throws
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{
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#if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
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boost::sp_array_constructor_hook( px );
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#endif
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}
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~scoped_array() // never throws
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{
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#if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
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boost::sp_array_destructor_hook( px );
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#endif
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boost::checked_array_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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BOOST_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[](std::ptrdiff_t i) const // never throws
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{
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BOOST_ASSERT( px != 0 );
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BOOST_ASSERT( i >= 0 );
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return px[i];
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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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// implicit conversion to "bool"
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#include <boost/smart_ptr/detail/operator_bool.hpp>
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void swap(scoped_array & 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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template<class T> inline void swap(scoped_array<T> & a, scoped_array<T> & b) // never throws
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{
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a.swap(b);
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}
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} // namespace boost
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#endif // #ifndef BOOST_SMART_PTR_SCOPED_ARRAY_HPP_INCLUDED
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