[29] | 1 | #ifndef BOOST_SCOPED_ARRAY_HPP_INCLUDED |
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| 2 | #define BOOST_SCOPED_ARRAY_HPP_INCLUDED |
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| 3 | |
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| 4 | // (C) Copyright Greg Colvin and Beman Dawes 1998, 1999. |
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| 5 | // Copyright (c) 2001, 2002 Peter Dimov |
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| 6 | // |
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| 7 | // Distributed under the Boost Software License, Version 1.0. (See |
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| 8 | // accompanying file LICENSE_1_0.txt or copy at |
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| 9 | // http://www.boost.org/LICENSE_1_0.txt) |
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| 10 | // |
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| 11 | // http://www.boost.org/libs/smart_ptr/scoped_array.htm |
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| 12 | // |
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| 13 | |
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| 14 | #include <boost/assert.hpp> |
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| 15 | #include <boost/checked_delete.hpp> |
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| 16 | #include <boost/config.hpp> // in case ptrdiff_t not in std |
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| 17 | |
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| 18 | #include <boost/detail/workaround.hpp> |
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| 19 | |
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| 20 | #include <cstddef> // for std::ptrdiff_t |
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| 21 | |
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| 22 | namespace boost |
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| 23 | { |
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| 24 | |
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| 25 | // Debug hooks |
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| 26 | |
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| 27 | #if defined(BOOST_SP_ENABLE_DEBUG_HOOKS) |
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| 28 | |
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| 29 | void sp_array_constructor_hook(void * p); |
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| 30 | void sp_array_destructor_hook(void * p); |
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| 31 | |
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| 32 | #endif |
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| 33 | |
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| 34 | // scoped_array extends scoped_ptr to arrays. Deletion of the array pointed to |
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| 35 | // is guaranteed, either on destruction of the scoped_array or via an explicit |
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| 36 | // reset(). Use shared_array or std::vector if your needs are more complex. |
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| 37 | |
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| 38 | template<class T> class scoped_array // noncopyable |
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| 39 | { |
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| 40 | private: |
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| 41 | |
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| 42 | T * ptr; |
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| 43 | |
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| 44 | scoped_array(scoped_array const &); |
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| 45 | scoped_array & operator=(scoped_array const &); |
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| 46 | |
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| 47 | typedef scoped_array<T> this_type; |
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| 48 | |
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| 49 | public: |
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| 50 | |
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| 51 | typedef T element_type; |
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| 52 | |
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| 53 | explicit scoped_array(T * p = 0) : ptr(p) // never throws |
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| 54 | { |
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| 55 | #if defined(BOOST_SP_ENABLE_DEBUG_HOOKS) |
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| 56 | boost::sp_array_constructor_hook(ptr); |
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| 57 | #endif |
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| 58 | } |
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| 59 | |
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| 60 | ~scoped_array() // never throws |
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| 61 | { |
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| 62 | #if defined(BOOST_SP_ENABLE_DEBUG_HOOKS) |
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| 63 | boost::sp_array_destructor_hook(ptr); |
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| 64 | #endif |
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| 65 | boost::checked_array_delete(ptr); |
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| 66 | } |
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| 67 | |
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| 68 | void reset(T * p = 0) // never throws |
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| 69 | { |
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| 70 | BOOST_ASSERT(p == 0 || p != ptr); // catch self-reset errors |
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| 71 | this_type(p).swap(*this); |
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| 72 | } |
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| 73 | |
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| 74 | T & operator[](std::ptrdiff_t i) const // never throws |
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| 75 | { |
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| 76 | BOOST_ASSERT(ptr != 0); |
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| 77 | BOOST_ASSERT(i >= 0); |
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| 78 | return ptr[i]; |
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| 79 | } |
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| 80 | |
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| 81 | T * get() const // never throws |
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| 82 | { |
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| 83 | return ptr; |
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| 84 | } |
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| 85 | |
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| 86 | // implicit conversion to "bool" |
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| 87 | |
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| 88 | #if defined(__SUNPRO_CC) && BOOST_WORKAROUND(__SUNPRO_CC, <= 0x530) |
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| 89 | |
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| 90 | operator bool () const |
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| 91 | { |
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| 92 | return ptr != 0; |
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| 93 | } |
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| 94 | |
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| 95 | #elif defined(__MWERKS__) && BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3003)) |
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| 96 | typedef T * (this_type::*unspecified_bool_type)() const; |
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| 97 | |
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| 98 | operator unspecified_bool_type() const // never throws |
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| 99 | { |
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| 100 | return ptr == 0? 0: &this_type::get; |
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| 101 | } |
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| 102 | |
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| 103 | #else |
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| 104 | |
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| 105 | typedef T * this_type::*unspecified_bool_type; |
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| 106 | |
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| 107 | operator unspecified_bool_type() const // never throws |
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| 108 | { |
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| 109 | return ptr == 0? 0: &this_type::ptr; |
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| 110 | } |
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| 111 | |
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| 112 | #endif |
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| 113 | |
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| 114 | bool operator! () const // never throws |
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| 115 | { |
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| 116 | return ptr == 0; |
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| 117 | } |
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| 118 | |
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| 119 | void swap(scoped_array & b) // never throws |
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| 120 | { |
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| 121 | T * tmp = b.ptr; |
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| 122 | b.ptr = ptr; |
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| 123 | ptr = tmp; |
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| 124 | } |
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| 125 | |
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| 126 | }; |
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| 127 | |
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| 128 | template<class T> inline void swap(scoped_array<T> & a, scoped_array<T> & b) // never throws |
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| 129 | { |
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| 130 | a.swap(b); |
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| 131 | } |
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| 132 | |
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| 133 | } // namespace boost |
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| 134 | |
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| 135 | #endif // #ifndef BOOST_SCOPED_ARRAY_HPP_INCLUDED |
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