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Diffstat (limited to 'src/third_party/boost-1.56.0/boost/smart_ptr/shared_array.hpp')
-rw-r--r-- | src/third_party/boost-1.56.0/boost/smart_ptr/shared_array.hpp | 292 |
1 files changed, 292 insertions, 0 deletions
diff --git a/src/third_party/boost-1.56.0/boost/smart_ptr/shared_array.hpp b/src/third_party/boost-1.56.0/boost/smart_ptr/shared_array.hpp new file mode 100644 index 00000000000..fd58071be04 --- /dev/null +++ b/src/third_party/boost-1.56.0/boost/smart_ptr/shared_array.hpp @@ -0,0 +1,292 @@ +#ifndef BOOST_SMART_PTR_SHARED_ARRAY_HPP_INCLUDED +#define BOOST_SMART_PTR_SHARED_ARRAY_HPP_INCLUDED + +// +// shared_array.hpp +// +// (C) Copyright Greg Colvin and Beman Dawes 1998, 1999. +// Copyright (c) 2001, 2002, 2012 Peter Dimov +// +// Distributed under the Boost Software License, Version 1.0. (See +// accompanying file LICENSE_1_0.txt or copy at +// http://www.boost.org/LICENSE_1_0.txt) +// +// See http://www.boost.org/libs/smart_ptr/shared_array.htm for documentation. +// + +#include <boost/config.hpp> // for broken compiler workarounds + +#include <memory> // TR1 cyclic inclusion fix + +#include <boost/assert.hpp> +#include <boost/checked_delete.hpp> + +#include <boost/smart_ptr/shared_ptr.hpp> +#include <boost/smart_ptr/detail/shared_count.hpp> +#include <boost/smart_ptr/detail/sp_nullptr_t.hpp> +#include <boost/detail/workaround.hpp> + +#include <cstddef> // for std::ptrdiff_t +#include <algorithm> // for std::swap +#include <functional> // for std::less + +namespace boost +{ + +// +// shared_array +// +// shared_array extends shared_ptr to arrays. +// The array pointed to is deleted when the last shared_array pointing to it +// is destroyed or reset. +// + +template<class T> class shared_array +{ +private: + + // Borland 5.5.1 specific workarounds + typedef checked_array_deleter<T> deleter; + typedef shared_array<T> this_type; + +public: + + typedef T element_type; + + shared_array() BOOST_NOEXCEPT : px( 0 ), pn() + { + } + +#if !defined( BOOST_NO_CXX11_NULLPTR ) + + shared_array( boost::detail::sp_nullptr_t ) BOOST_NOEXCEPT : px( 0 ), pn() + { + } + +#endif + + template<class Y> + explicit shared_array( Y * p ): px( p ), pn( p, checked_array_deleter<Y>() ) + { + boost::detail::sp_assert_convertible< Y[], T[] >(); + } + + // + // Requirements: D's copy constructor must not throw + // + // shared_array will release p by calling d(p) + // + + template<class Y, class D> shared_array( Y * p, D d ): px( p ), pn( p, d ) + { + boost::detail::sp_assert_convertible< Y[], T[] >(); + } + + // As above, but with allocator. A's copy constructor shall not throw. + + template<class Y, class D, class A> shared_array( Y * p, D d, A a ): px( p ), pn( p, d, a ) + { + boost::detail::sp_assert_convertible< Y[], T[] >(); + } + +// generated copy constructor, destructor are fine... + +#if !defined( BOOST_NO_CXX11_RVALUE_REFERENCES ) + +// ... except in C++0x, move disables the implicit copy + + shared_array( shared_array const & r ) BOOST_NOEXCEPT : px( r.px ), pn( r.pn ) + { + } + + shared_array( shared_array && r ) BOOST_NOEXCEPT : px( r.px ), pn() + { + pn.swap( r.pn ); + r.px = 0; + } + +#endif + + // conversion + + template<class Y> +#if !defined( BOOST_SP_NO_SP_CONVERTIBLE ) + + shared_array( shared_array<Y> const & r, typename boost::detail::sp_enable_if_convertible< Y[], T[] >::type = boost::detail::sp_empty() ) + +#else + + shared_array( shared_array<Y> const & r ) + +#endif + BOOST_NOEXCEPT : px( r.px ), pn( r.pn ) // never throws + { + boost::detail::sp_assert_convertible< Y[], T[] >(); + } + + // aliasing + + template< class Y > + shared_array( shared_array<Y> const & r, element_type * p ) BOOST_NOEXCEPT : px( p ), pn( r.pn ) + { + } + + // assignment + + shared_array & operator=( shared_array const & r ) BOOST_NOEXCEPT + { + this_type( r ).swap( *this ); + return *this; + } + +#if !defined(BOOST_MSVC) || (BOOST_MSVC >= 1400) + + template<class Y> + shared_array & operator=( shared_array<Y> const & r ) BOOST_NOEXCEPT + { + this_type( r ).swap( *this ); + return *this; + } + +#endif + +#if !defined( BOOST_NO_CXX11_RVALUE_REFERENCES ) + + shared_array & operator=( shared_array && r ) BOOST_NOEXCEPT + { + this_type( static_cast< shared_array && >( r ) ).swap( *this ); + return *this; + } + + template<class Y> + shared_array & operator=( shared_array<Y> && r ) BOOST_NOEXCEPT + { + this_type( static_cast< shared_array<Y> && >( r ) ).swap( *this ); + return *this; + } + +#endif + + void reset() BOOST_NOEXCEPT + { + this_type().swap( *this ); + } + + template<class Y> void reset( Y * p ) // Y must be complete + { + BOOST_ASSERT( p == 0 || p != px ); // catch self-reset errors + this_type( p ).swap( *this ); + } + + template<class Y, class D> void reset( Y * p, D d ) + { + this_type( p, d ).swap( *this ); + } + + template<class Y, class D, class A> void reset( Y * p, D d, A a ) + { + this_type( p, d, a ).swap( *this ); + } + + template<class Y> void reset( shared_array<Y> const & r, element_type * p ) + { + this_type( r, p ).swap( *this ); + } + + T & operator[] (std::ptrdiff_t i) const // never throws (but has a BOOST_ASSERT in it, so not marked with BOOST_NOEXCEPT) + { + BOOST_ASSERT(px != 0); + BOOST_ASSERT(i >= 0); + return px[i]; + } + + T * get() const BOOST_NOEXCEPT + { + return px; + } + +// implicit conversion to "bool" +#include <boost/smart_ptr/detail/operator_bool.hpp> + + bool unique() const BOOST_NOEXCEPT + { + return pn.unique(); + } + + long use_count() const BOOST_NOEXCEPT + { + return pn.use_count(); + } + + void swap(shared_array<T> & other) BOOST_NOEXCEPT + { + std::swap(px, other.px); + pn.swap(other.pn); + } + + void * _internal_get_deleter( boost::detail::sp_typeinfo const & ti ) const + { + return pn.get_deleter( ti ); + } + +private: + + template<class Y> friend class shared_array; + + T * px; // contained pointer + detail::shared_count pn; // reference counter + +}; // shared_array + +template<class T> inline bool operator==(shared_array<T> const & a, shared_array<T> const & b) BOOST_NOEXCEPT +{ + return a.get() == b.get(); +} + +template<class T> inline bool operator!=(shared_array<T> const & a, shared_array<T> const & b) BOOST_NOEXCEPT +{ + return a.get() != b.get(); +} + +#if !defined( BOOST_NO_CXX11_NULLPTR ) + +template<class T> inline bool operator==( shared_array<T> const & p, boost::detail::sp_nullptr_t ) BOOST_NOEXCEPT +{ + return p.get() == 0; +} + +template<class T> inline bool operator==( boost::detail::sp_nullptr_t, shared_array<T> const & p ) BOOST_NOEXCEPT +{ + return p.get() == 0; +} + +template<class T> inline bool operator!=( shared_array<T> const & p, boost::detail::sp_nullptr_t ) BOOST_NOEXCEPT +{ + return p.get() != 0; +} + +template<class T> inline bool operator!=( boost::detail::sp_nullptr_t, shared_array<T> const & p ) BOOST_NOEXCEPT +{ + return p.get() != 0; +} + +#endif + +template<class T> inline bool operator<(shared_array<T> const & a, shared_array<T> const & b) BOOST_NOEXCEPT +{ + return std::less<T*>()(a.get(), b.get()); +} + +template<class T> void swap(shared_array<T> & a, shared_array<T> & b) BOOST_NOEXCEPT +{ + a.swap(b); +} + +template< class D, class T > D * get_deleter( shared_array<T> const & p ) +{ + return static_cast< D * >( p._internal_get_deleter( BOOST_SP_TYPEID(D) ) ); +} + +} // namespace boost + +#endif // #ifndef BOOST_SMART_PTR_SHARED_ARRAY_HPP_INCLUDED |