// Temporary buffer implementation -*- C++ -*-
-// Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
-// Free Software Foundation, Inc.
+// Copyright (C) 2001-2017 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
* purpose. It is provided "as is" without express or implied warranty.
*/
-/** @file stl_tempbuf.h
+/** @file bits/stl_tempbuf.h
* This is an internal header file, included by other library headers.
- * You should not attempt to use it directly.
+ * Do not attempt to use it directly. @headername{memory}
*/
#ifndef _STL_TEMPBUF_H
#include <bits/stl_algobase.h>
#include <bits/stl_construct.h>
-#include <bits/stl_uninitialized.h>
-_GLIBCXX_BEGIN_NAMESPACE(std)
+namespace std _GLIBCXX_VISIBILITY(default)
+{
+_GLIBCXX_BEGIN_NAMESPACE_VERSION
/**
* @brief Allocates a temporary buffer.
- * @param len The number of objects of type Tp.
+ * @param __len The number of objects of type Tp.
* @return See full description.
*
* Reinventing the wheel, but this time with prettier spokes!
*
- * This function tries to obtain storage for @c len adjacent Tp
+ * This function tries to obtain storage for @c __len adjacent Tp
* objects. The objects themselves are not constructed, of course.
- * A pair<> is returned containing "the buffer s address and
- * capacity (in the units of sizeof(Tp)), or a pair of 0 values if
- * no storage can be obtained." Note that the capacity obtained
+ * A pair<> is returned containing <em>the buffer s address and
+ * capacity (in the units of sizeof(_Tp)), or a pair of 0 values if
+ * no storage can be obtained.</em> Note that the capacity obtained
* may be less than that requested if the memory is unavailable;
* you should compare len with the .second return value.
*
*/
template<typename _Tp>
pair<_Tp*, ptrdiff_t>
- get_temporary_buffer(ptrdiff_t __len)
+ get_temporary_buffer(ptrdiff_t __len) _GLIBCXX_NOEXCEPT
{
const ptrdiff_t __max =
__gnu_cxx::__numeric_traits<ptrdiff_t>::__max / sizeof(_Tp);
/**
* @brief The companion to get_temporary_buffer().
- * @param p A buffer previously allocated by get_temporary_buffer.
+ * @param __p A buffer previously allocated by get_temporary_buffer.
* @return None.
*
- * Frees the memory pointed to by p.
+ * Frees the memory pointed to by __p.
*/
template<typename _Tp>
inline void
operator=(const _Temporary_buffer&);
};
+
+ template<bool>
+ struct __uninitialized_construct_buf_dispatch
+ {
+ template<typename _Pointer, typename _ForwardIterator>
+ static void
+ __ucr(_Pointer __first, _Pointer __last,
+ _ForwardIterator __seed)
+ {
+ if(__first == __last)
+ return;
+
+ _Pointer __cur = __first;
+ __try
+ {
+ std::_Construct(std::__addressof(*__first),
+ _GLIBCXX_MOVE(*__seed));
+ _Pointer __prev = __cur;
+ ++__cur;
+ for(; __cur != __last; ++__cur, ++__prev)
+ std::_Construct(std::__addressof(*__cur),
+ _GLIBCXX_MOVE(*__prev));
+ *__seed = _GLIBCXX_MOVE(*__prev);
+ }
+ __catch(...)
+ {
+ std::_Destroy(__first, __cur);
+ __throw_exception_again;
+ }
+ }
+ };
+
+ template<>
+ struct __uninitialized_construct_buf_dispatch<true>
+ {
+ template<typename _Pointer, typename _ForwardIterator>
+ static void
+ __ucr(_Pointer, _Pointer, _ForwardIterator) { }
+ };
+
+ // Constructs objects in the range [first, last).
+ // Note that while these new objects will take valid values,
+ // their exact value is not defined. In particular they may
+ // be 'moved from'.
+ //
+ // While *__seed may be altered during this algorithm, it will have
+ // the same value when the algorithm finishes, unless one of the
+ // constructions throws.
+ //
+ // Requirements: _Pointer::value_type(_Tp&&) is valid.
+ template<typename _Pointer, typename _ForwardIterator>
+ inline void
+ __uninitialized_construct_buf(_Pointer __first, _Pointer __last,
+ _ForwardIterator __seed)
+ {
+ typedef typename std::iterator_traits<_Pointer>::value_type
+ _ValueType;
+
+ std::__uninitialized_construct_buf_dispatch<
+ __has_trivial_constructor(_ValueType)>::
+ __ucr(__first, __last, __seed);
+ }
+
template<typename _ForwardIterator, typename _Tp>
_Temporary_buffer<_ForwardIterator, _Tp>::
_Temporary_buffer(_ForwardIterator __first, _ForwardIterator __last)
value_type>(_M_original_len));
_M_buffer = __p.first;
_M_len = __p.second;
- if(_M_buffer)
- std::__uninitialized_construct_range(_M_buffer, _M_buffer + _M_len,
- *__first);
+ if (_M_buffer)
+ std::__uninitialized_construct_buf(_M_buffer, _M_buffer + _M_len,
+ __first);
}
__catch(...)
{
}
}
-_GLIBCXX_END_NAMESPACE
+_GLIBCXX_END_NAMESPACE_VERSION
+} // namespace
#endif /* _STL_TEMPBUF_H */
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