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1 // |
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2 // Boost.Pointer Container |
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3 // |
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4 // Copyright Thorsten Ottosen 2003-2005. Use, modification and |
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5 // distribution is subject to the Boost Software License, Version |
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6 // 1.0. (See accompanying file LICENSE_1_0.txt or copy at |
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7 // http://www.boost.org/LICENSE_1_0.txt) |
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8 // |
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9 // For more information, see http://www.boost.org/libs/ptr_container/ |
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10 // |
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11 |
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12 #ifndef BOOST_PTR_CONTAINER_SCOPED_DELETER_HPP |
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13 #define BOOST_PTR_CONTAINER_SCOPED_DELETER_HPP |
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14 |
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15 #if defined(_MSC_VER) && (_MSC_VER >= 1200) |
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16 # pragma once |
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17 #endif |
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18 |
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19 #include <iterator> |
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20 #include <cstddef> |
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21 #include <boost/scoped_array.hpp> |
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22 |
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23 namespace boost |
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24 { |
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25 |
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26 namespace ptr_container_detail |
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27 { |
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28 template< class T, class CloneAllocator > |
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29 class scoped_deleter |
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30 { |
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31 typedef std::size_t size_type; |
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32 scoped_array<T*> ptrs_; |
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33 size_type stored_; |
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34 bool released_; |
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35 |
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36 public: |
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37 scoped_deleter( size_type size ) : |
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38 ptrs_( new T*[size] ), stored_( 0 ), |
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39 released_( false ) |
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40 { |
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41 BOOST_ASSERT( size > 0 ); |
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42 } |
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43 |
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44 |
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45 |
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46 scoped_deleter( size_type n, const T& x ) // strong |
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47 : ptrs_( new T*[n] ), stored_(0), |
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48 released_( false ) |
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49 { |
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50 for( size_type i = 0; i != n; i++ ) |
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51 add( CloneAllocator::allocate_clone( &x ) ); |
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52 BOOST_ASSERT( stored_ > 0 ); |
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53 } |
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54 |
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55 |
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56 |
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57 template< class InputIterator > |
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58 scoped_deleter ( InputIterator first, InputIterator last ) // strong |
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59 : ptrs_( new T*[ std::distance(first,last) ] ), |
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60 stored_(0), |
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61 released_( false ) |
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62 { |
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63 for( ; first != last; ++first ) |
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64 add( CloneAllocator::allocate_clone_from_iterator( first ) ); |
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65 BOOST_ASSERT( stored_ > 0 ); |
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66 } |
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67 |
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68 |
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69 |
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70 ~scoped_deleter() |
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71 { |
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72 if ( !released_ ) |
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73 { |
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74 for( size_type i = 0u; i != stored_; ++i ) |
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75 CloneAllocator::deallocate_clone( ptrs_[i] ); |
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76 } |
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77 } |
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78 |
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79 |
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80 |
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81 void add( T* t ) |
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82 { |
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83 BOOST_ASSERT( ptrs_.get() != 0 ); |
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84 ptrs_[stored_] = t; |
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85 ++stored_; |
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86 } |
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87 |
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88 |
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89 |
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90 void release() |
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91 { |
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92 released_ = true; |
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93 } |
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94 |
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95 |
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96 |
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97 T** begin() |
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98 { |
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99 BOOST_ASSERT( ptrs_.get() != 0 ); |
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100 return &ptrs_[0]; |
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101 } |
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102 |
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103 |
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104 |
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105 T** end() |
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106 { |
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107 BOOST_ASSERT( ptrs_.get() != 0 ); |
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108 return &ptrs_[stored_]; |
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109 } |
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110 |
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111 }; // class 'scoped_deleter' |
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112 } |
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113 } |
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114 |
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115 #endif |