author | Pat Downey <patd@symbian.org> |
Fri, 04 Jun 2010 16:20:51 +0100 | |
changeset 31 | ce057bb09d0b |
parent 0 | e4d67989cc36 |
permissions | -rw-r--r-- |
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#ifndef BOOST_SCOPED_ARRAY_HPP_INCLUDED |
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#define BOOST_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 * ptr; |
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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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public: |
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typedef T element_type; |
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explicit scoped_array(T * p = 0) : ptr(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(ptr); |
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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(ptr); |
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#endif |
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boost::checked_array_delete(ptr); |
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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 != ptr); // 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(ptr != 0); |
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BOOST_ASSERT(i >= 0); |
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return ptr[i]; |
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} |
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T * get() const // never throws |
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{ |
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return ptr; |
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} |
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// implicit conversion to "bool" |
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#if defined(__SUNPRO_CC) && BOOST_WORKAROUND(__SUNPRO_CC, <= 0x530) |
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operator bool () const |
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{ |
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return ptr != 0; |
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} |
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#elif defined(__MWERKS__) && BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3003)) |
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typedef T * (this_type::*unspecified_bool_type)() const; |
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operator unspecified_bool_type() const // never throws |
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{ |
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return ptr == 0? 0: &this_type::get; |
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} |
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#else |
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typedef T * this_type::*unspecified_bool_type; |
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operator unspecified_bool_type() const // never throws |
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{ |
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return ptr == 0? 0: &this_type::ptr; |
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} |
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#endif |
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bool operator! () const // never throws |
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{ |
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return ptr == 0; |
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} |
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void swap(scoped_array & b) // never throws |
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{ |
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T * tmp = b.ptr; |
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b.ptr = ptr; |
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ptr = 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_SCOPED_ARRAY_HPP_INCLUDED |