- }
-
- void _M_initialize_buffer(const _Tp&, __true_type) {}
- void _M_initialize_buffer(const _Tp& val, __false_type) {
- uninitialized_fill_n(_M_buffer, _M_len, val);
- }
-
-public:
- /// As per Table mumble.
- ptrdiff_t size() const { return _M_len; }
- /// Returns the size requested by the constructor; may be >size().
- ptrdiff_t requested_size() const { return _M_original_len; }
- /// As per Table mumble.
- _Tp* begin() { return _M_buffer; }
- /// As per Table mumble.
- _Tp* end() { return _M_buffer + _M_len; }
-
- _Temporary_buffer(_ForwardIterator __first, _ForwardIterator __last) {
- // Workaround for a __type_traits bug in the pre-7.3 compiler.
- typedef typename __type_traits<_Tp>::has_trivial_default_constructor
- _Trivial;
-
- try {
- _M_len = distance(__first, __last);
- _M_allocate_buffer();
- if (_M_len > 0)
- _M_initialize_buffer(*__first, _Trivial());
- }
- catch(...)
- {
- free(_M_buffer);
- _M_buffer = 0;
- _M_len = 0;
- __throw_exception_again;
+
+ /**
+ * @brief The companion to get_temporary_buffer().
+ * @param p A buffer previously allocated by get_temporary_buffer.
+ * @return None.
+ *
+ * Frees the memory pointed to by p.
+ */
+ template<typename _Tp>
+ inline void
+ return_temporary_buffer(_Tp* __p)
+ { ::operator delete(__p, std::nothrow); }
+
+
+ /**
+ * This class is used in two places: stl_algo.h and ext/memory,
+ * where it is wrapped as the temporary_buffer class. See
+ * temporary_buffer docs for more notes.
+ */
+ template<typename _ForwardIterator, typename _Tp>
+ class _Temporary_buffer
+ {
+ // concept requirements
+ __glibcxx_class_requires(_ForwardIterator, _ForwardIteratorConcept)
+
+ public:
+ typedef _Tp value_type;
+ typedef value_type* pointer;
+ typedef pointer iterator;
+ typedef ptrdiff_t size_type;
+
+ protected:
+ size_type _M_original_len;
+ size_type _M_len;
+ pointer _M_buffer;
+
+ public:
+ /// As per Table mumble.
+ size_type
+ size() const
+ { return _M_len; }
+
+ /// Returns the size requested by the constructor; may be >size().
+ size_type
+ requested_size() const
+ { return _M_original_len; }
+
+ /// As per Table mumble.
+ iterator
+ begin()
+ { return _M_buffer; }
+
+ /// As per Table mumble.
+ iterator
+ end()
+ { return _M_buffer + _M_len; }
+
+ /**
+ * Constructs a temporary buffer of a size somewhere between
+ * zero and the size of the given range.
+ */
+ _Temporary_buffer(_ForwardIterator __first, _ForwardIterator __last);
+
+ ~_Temporary_buffer()
+ {
+ std::_Destroy(_M_buffer, _M_buffer + _M_len);
+ std::return_temporary_buffer(_M_buffer);