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_tempbuf.h
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1 /*
2  *
3  * Copyright (c) 1994
4  * Hewlett-Packard Company
5  *
6  * Copyright (c) 1996,1997
7  * Silicon Graphics Computer Systems, Inc.
8  *
9  * Copyright (c) 1997
10  * Moscow Center for SPARC Technology
11  *
12  * Copyright (c) 1999
13  * Boris Fomitchev
14  *
15  * This material is provided "as is", with absolutely no warranty expressed
16  * or implied. Any use is at your own risk.
17  *
18  * Permission to use or copy this software for any purpose is hereby granted
19  * without fee, provided the above notices are retained on all copies.
20  * Permission to modify the code and to distribute modified code is granted,
21  * provided the above notices are retained, and a notice that the code was
22  * modified is included with the above copyright notice.
23  *
24  */
25 
26 /* NOTE: This is an internal header file, included by other STL headers.
27  * You should not attempt to use it directly.
28  */
29 
30 #ifndef _STLP_INTERNAL_TEMPBUF_H
31 #define _STLP_INTERNAL_TEMPBUF_H
32 
33 #ifndef _STLP_CLIMITS
34 # include <climits>
35 #endif
36 
37 #ifndef _STLP_INTERNAL_CSTDLIB
38 # include <stl/_cstdlib.h>
39 #endif
40 
41 #ifndef _STLP_INTERNAL_UNINITIALIZED_H
42 # include <stl/_uninitialized.h>
43 #endif
44 
46 
47 template <class _Tp>
50 
51 #ifndef _STLP_NO_EXPLICIT_FUNCTION_TMPL_ARGS
52 
53 template <class _Tp>
55  return __get_temporary_buffer(__len, (_Tp*) 0);
56 }
57 
58 # if ! defined(_STLP_NO_EXTENSIONS)
59 // This overload is not required by the standard; it is an extension.
60 // It is supported for backward compatibility with the HP STL, and
61 // because not all compilers support the language feature (explicit
62 // function template arguments) that is required for the standard
63 // version of get_temporary_buffer.
64 template <class _Tp>
67  return __get_temporary_buffer(__len, (_Tp*) 0);
68 }
69 # endif
70 #endif
71 
72 template <class _Tp>
73 inline void _STLP_CALL return_temporary_buffer(_Tp* __p) {
74 // SunPro brain damage
75  free((char*)__p);
76 }
77 
78 template <class _ForwardIterator, class _Tp>
80 private:
83  _Tp* _M_buffer;
84 
87  _M_buffer = 0;
88 
89  if (_M_len > (ptrdiff_t)(INT_MAX / sizeof(_Tp)))
90  _M_len = INT_MAX / sizeof(_Tp);
91 
92  while (_M_len > 0) {
93  _M_buffer = (_Tp*) malloc(_M_len * sizeof(_Tp));
94  if (_M_buffer)
95  break;
96  _M_len /= 2;
97  }
98  }
99 
100  void _M_initialize_buffer(const _Tp&, const __true_type&) {}
101  void _M_initialize_buffer(const _Tp& val, const __false_type&) {
103  }
104 
105 public:
106  ptrdiff_t size() const { return _M_len; }
108  _Tp* begin() { return _M_buffer; }
109  _Tp* end() { return _M_buffer + _M_len; }
110 
111  _Temporary_buffer(_ForwardIterator __first, _ForwardIterator __last) {
112  // Workaround for a __type_traits bug in the pre-7.3 compiler.
113 # if defined(__sgi) && !defined(__GNUC__) && _COMPILER_VERSION < 730
114  typedef typename __type_traits<_Tp>::is_POD_type _Trivial;
115 # else
116  typedef typename __type_traits<_Tp>::has_trivial_default_constructor _Trivial;
117 # endif
118  _STLP_TRY {
119  _M_len = _STLP_STD::distance(__first, __last);
121  if (_M_len > 0)
122  _M_initialize_buffer(*__first, _Trivial());
123  }
125  }
126 
129  free(_M_buffer);
130  }
131 
132 private:
133  // Disable copy constructor and assignment operator.
136 };
137 
138 # ifndef _STLP_NO_EXTENSIONS
139 
140 // Class temporary_buffer is not part of the standard. It is an extension.
141 
142 template <class _ForwardIterator,
143  class _Tp
144 #ifdef _STLP_CLASS_PARTIAL_SPECIALIZATION
146 #endif /* _STLP_CLASS_PARTIAL_SPECIALIZATION */
147  >
148 struct temporary_buffer : public _Temporary_buffer<_ForwardIterator, _Tp>
149 {
150  temporary_buffer(_ForwardIterator __first, _ForwardIterator __last)
151  : _Temporary_buffer<_ForwardIterator, _Tp>(__first, __last) {}
153 };
154 
155 # endif /* _STLP_NO_EXTENSIONS */
156 
158 
159 # ifndef _STLP_LINK_TIME_INSTANTIATION
160 # include <stl/_tempbuf.c>
161 # endif
162 
163 #endif /* _STLP_INTERNAL_TEMPBUF_H */
164 
165 // Local Variables:
166 // mode:C++
167 // End:
void _M_initialize_buffer(const _Tp &, const __true_type &)
Definition: _tempbuf.h:100
_Iterator::value_type value_type
#define INT_MAX
Definition: limits.h:40
#define free
Definition: debug_ros.c:5
_Temporary_buffer(const _Temporary_buffer< _ForwardIterator, _Tp > &)
Definition: _tempbuf.h:134
_Temporary_buffer(_ForwardIterator __first, _ForwardIterator __last)
Definition: _tempbuf.h:111
GLsizei GLsizei GLfloat distance
Definition: glext.h:11755
#define _STLP_UNWIND(action)
Definition: features.h:824
_STLP_INLINE_LOOP _InputIter __last
Definition: _algo.h:68
void _M_initialize_buffer(const _Tp &val, const __false_type &)
Definition: _tempbuf.h:101
GLuint GLfloat * val
Definition: glext.h:7180
ptrdiff_t _M_original_len
Definition: _tempbuf.h:81
ptrdiff_t requested_size() const
Definition: _tempbuf.h:107
_STLP_BEGIN_NAMESPACE pair< _Tp *, ptrdiff_t > _STLP_CALL __get_temporary_buffer(ptrdiff_t __len, _Tp *)
Definition: _tempbuf.c:37
void operator=(const _Temporary_buffer< _ForwardIterator, _Tp > &)
Definition: _tempbuf.h:135
temporary_buffer(_ForwardIterator __first, _ForwardIterator __last)
Definition: _tempbuf.h:150
_STLP_MOVE_TO_STD_NAMESPACE void uninitialized_fill_n(_ForwardIter __first, _Size __n, const _Tp &__x)
void _Destroy_Range(_ForwardIterator __first, _ForwardIterator __last)
Definition: _construct.h:219
ptrdiff_t _M_len
Definition: _tempbuf.h:82
#define _STLP_END_NAMESPACE
Definition: features.h:503
ptrdiff_t size() const
Definition: _tempbuf.h:106
#define _STLP_TRY
Definition: features.h:817
Definition: _pair.h:47
__kernel_ptrdiff_t ptrdiff_t
Definition: linux.h:247
void _STLP_CALL return_temporary_buffer(_Tp *__p)
Definition: _tempbuf.h:73
#define malloc
Definition: debug_ros.c:4
#define _STLP_BEGIN_NAMESPACE
Definition: features.h:501
void _M_allocate_buffer()
Definition: _tempbuf.h:85
#define _STLP_CALL
Definition: _bc.h:131
pair< _Tp *, ptrdiff_t > _STLP_CALL get_temporary_buffer(ptrdiff_t __len)
Definition: _tempbuf.h:54