ceph/src/boost/boost/smart_ptr/scoped_array.hpp

   1 #ifndef BOOST_SMART_PTR_SCOPED_ARRAY_HPP_INCLUDED
   2 #define BOOST_SMART_PTR_SCOPED_ARRAY_HPP_INCLUDED
   3
   4 //  (C) Copyright Greg Colvin and Beman Dawes 1998, 1999.
   5 //  Copyright (c) 2001, 2002 Peter Dimov
   6 //
   7 //  Distributed under the Boost Software License, Version 1.0. (See
   8 //  accompanying file LICENSE_1_0.txt or copy at
   9 //  http://www.boost.org/LICENSE_1_0.txt)
  10 //
  11 //  See http://www.boost.org/libs/smart_ptr/ for documentation.
  12
  13 #include <boost/config.hpp>
  14 #include <boost/assert.hpp>
  15 #include <boost/checked_delete.hpp>
  16 #include <boost/smart_ptr/detail/sp_nullptr_t.hpp>
  17 #include <boost/smart_ptr/detail/sp_noexcept.hpp>
  18
  19 #include <boost/detail/workaround.hpp>
  20
  21 #include <cstddef>            // for std::ptrdiff_t
  22
  23 namespace boost
  24 {
  25
  26 // Debug hooks
  27
  28 #if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
  29
  30 void sp_array_constructor_hook(void * p);
  31 void sp_array_destructor_hook(void * p);
  32
  33 #endif
  34
  35 //  scoped_array extends scoped_ptr to arrays. Deletion of the array pointed to
  36 //  is guaranteed, either on destruction of the scoped_array or via an explicit
  37 //  reset(). Use shared_array or std::vector if your needs are more complex.
  38
  39 template<class T> class scoped_array // noncopyable
  40 {
  41 private:
  42
  43     T * px;
  44
  45     scoped_array(scoped_array const &);
  46     scoped_array & operator=(scoped_array const &);
  47
  48     typedef scoped_array<T> this_type;
  49
  50     void operator==( scoped_array const& ) const;
  51     void operator!=( scoped_array const& ) const;
  52
  53 public:
  54
  55     typedef T element_type;
  56
  57     explicit scoped_array( T * p = 0 ) BOOST_SP_NOEXCEPT : px( p )
  58     {
  59 #if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
  60         boost::sp_array_constructor_hook( px );
  61 #endif
  62     }
  63
  64     ~scoped_array() BOOST_SP_NOEXCEPT
  65     {
  66 #if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
  67         boost::sp_array_destructor_hook( px );
  68 #endif
  69         boost::checked_array_delete( px );
  70     }
  71
  72     void reset(T * p = 0) BOOST_SP_NOEXCEPT_WITH_ASSERT
  73     {
  74         BOOST_ASSERT( p == 0 || p != px ); // catch self-reset errors
  75         this_type(p).swap(*this);
  76     }
  77
  78     T & operator[](std::ptrdiff_t i) const BOOST_SP_NOEXCEPT_WITH_ASSERT
  79     {
  80         BOOST_ASSERT( px != 0 );
  81         BOOST_ASSERT( i >= 0 );
  82         return px[i];
  83     }
  84
  85     T * get() const BOOST_SP_NOEXCEPT
  86     {
  87         return px;
  88     }
  89
  90 // implicit conversion to "bool"
  91 #include <boost/smart_ptr/detail/operator_bool.hpp>
  92
  93     void swap(scoped_array & b) BOOST_SP_NOEXCEPT
  94     {
  95         T * tmp = b.px;
  96         b.px = px;
  97         px = tmp;
  98     }
  99 };
 100
 101 #if !defined( BOOST_NO_CXX11_NULLPTR )
 102
 103 template<class T> inline bool operator==( scoped_array<T> const & p, boost::detail::sp_nullptr_t ) BOOST_SP_NOEXCEPT
 104 {
 105     return p.get() == 0;
 106 }
 107
 108 template<class T> inline bool operator==( boost::detail::sp_nullptr_t, scoped_array<T> const & p ) BOOST_SP_NOEXCEPT
 109 {
 110     return p.get() == 0;
 111 }
 112
 113 template<class T> inline bool operator!=( scoped_array<T> const & p, boost::detail::sp_nullptr_t ) BOOST_SP_NOEXCEPT
 114 {
 115     return p.get() != 0;
 116 }
 117
 118 template<class T> inline bool operator!=( boost::detail::sp_nullptr_t, scoped_array<T> const & p ) BOOST_SP_NOEXCEPT
 119 {
 120     return p.get() != 0;
 121 }
 122
 123 #endif
 124
 125 template<class T> inline void swap(scoped_array<T> & a, scoped_array<T> & b) BOOST_SP_NOEXCEPT
 126 {
 127     a.swap(b);
 128 }
 129
 130 } // namespace boost
 131
 132 #endif  // #ifndef BOOST_SMART_PTR_SCOPED_ARRAY_HPP_INCLUDED