1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
|
// -*- C++ -*-
// Copyright (C) 2005, 2006 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 terms
// of the GNU General Public License as published by the Free Software
// Foundation; either version 2, or (at your option) any later
// version.
// This library is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this library; see the file COPYING. If not, write to
// the Free Software Foundation, 59 Temple Place - Suite 330, Boston,
// MA 02111-1307, USA.
// As a special exception, you may use this file as part of a free
// software library without restriction. Specifically, if other files
// instantiate templates or use macros or inline functions from this
// file, or you compile this file and link it with other files to
// produce an executable, this file does not by itself cause the
// resulting executable to be covered by the GNU General Public
// License. This exception does not however invalidate any other
// reasons why the executable file might be covered by the GNU General
// Public License.
// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
// Permission to use, copy, modify, sell, and distribute this software
// is hereby granted without fee, provided that the above copyright
// notice appears in all copies, and that both that copyright notice
// and this permission notice appear in supporting documentation. None
// of the above authors, nor IBM Haifa Research Laboratories, make any
// representation about the suitability of this software for any
// purpose. It is provided "as is" without express or implied
// warranty.
/**
* @file hash_load_check_resize_trigger_imp.hpp
* Contains a resize trigger implementation.
*/
#define PB_DS_STATIC_ASSERT(UNIQUE, E) \
typedef detail::static_assert_dumclass<sizeof(detail::static_assert<(bool)(E)>)> \
UNIQUE##static_assert_type
PB_DS_CLASS_T_DEC
PB_DS_CLASS_C_DEC::
hash_load_check_resize_trigger(float load_min, float load_max) :
m_load_min(load_min),
m_load_max(load_max),
m_next_shrink_size(0),
m_next_grow_size(0),
m_resize_needed(false)
{
PB_DS_DBG_ONLY(assert_valid();)
}
PB_DS_CLASS_T_DEC
inline void
PB_DS_CLASS_C_DEC::
notify_find_search_start()
{
PB_DS_DBG_ONLY(assert_valid();)
}
PB_DS_CLASS_T_DEC
inline void
PB_DS_CLASS_C_DEC::
notify_find_search_collision()
{
PB_DS_DBG_ONLY(assert_valid();)
}
PB_DS_CLASS_T_DEC
inline void
PB_DS_CLASS_C_DEC::
notify_find_search_end()
{
PB_DS_DBG_ONLY(assert_valid();)
}
PB_DS_CLASS_T_DEC
inline void
PB_DS_CLASS_C_DEC::
notify_insert_search_start()
{
PB_DS_DBG_ONLY(assert_valid();)
}
PB_DS_CLASS_T_DEC
inline void
PB_DS_CLASS_C_DEC::
notify_insert_search_collision()
{
PB_DS_DBG_ONLY(assert_valid();)
}
PB_DS_CLASS_T_DEC
inline void
PB_DS_CLASS_C_DEC::
notify_insert_search_end()
{
PB_DS_DBG_ONLY(assert_valid();)
}
PB_DS_CLASS_T_DEC
inline void
PB_DS_CLASS_C_DEC::
notify_erase_search_start()
{
PB_DS_DBG_ONLY(assert_valid();)
}
PB_DS_CLASS_T_DEC
inline void
PB_DS_CLASS_C_DEC::
notify_erase_search_collision()
{
PB_DS_DBG_ONLY(assert_valid();)
}
PB_DS_CLASS_T_DEC
inline void
PB_DS_CLASS_C_DEC::
notify_erase_search_end()
{
PB_DS_DBG_ONLY(assert_valid();)
}
PB_DS_CLASS_T_DEC
inline void
PB_DS_CLASS_C_DEC::
notify_inserted(size_type num_entries)
{
m_resize_needed = (num_entries >= m_next_grow_size);
size_base::set_size(num_entries);
PB_DS_DBG_ONLY(assert_valid();)
}
PB_DS_CLASS_T_DEC
inline void
PB_DS_CLASS_C_DEC::
notify_erased(size_type num_entries)
{
size_base::set_size(num_entries);
m_resize_needed =
num_entries <= m_next_shrink_size;
PB_DS_DBG_ONLY(assert_valid();)
}
PB_DS_CLASS_T_DEC
inline bool
PB_DS_CLASS_C_DEC::
is_resize_needed() const
{
PB_DS_DBG_ONLY(assert_valid();)
return (m_resize_needed);
}
PB_DS_CLASS_T_DEC
inline bool
PB_DS_CLASS_C_DEC::
is_grow_needed(size_type /*size*/, size_type num_entries) const
{
PB_DS_DBG_ASSERT(m_resize_needed);
return (num_entries >= m_next_grow_size);
}
PB_DS_CLASS_T_DEC
PB_DS_CLASS_C_DEC::
~hash_load_check_resize_trigger()
{ }
PB_DS_CLASS_T_DEC
void
PB_DS_CLASS_C_DEC::
notify_resized(size_type new_size)
{
m_resize_needed = false;
m_next_grow_size =
size_type(m_load_max* new_size - 1);
m_next_shrink_size =
size_type(m_load_min* new_size);
#ifdef PB_DS_HT_MAP_RESIZE_TRACE_
std::cerr << "hlcrt::notify_resized " <<
static_cast<unsigned long>(new_size) << " " <<
static_cast<unsigned long>(m_load_min) << " " <<
static_cast<unsigned long>(m_load_max) << " " <<
static_cast<unsigned long>(m_next_shrink_size) << " " <<
static_cast<unsigned long>(m_next_grow_size) << " " << std::endl;
#endif // #ifdef PB_DS_HT_MAP_RESIZE_TRACE_
PB_DS_DBG_ONLY(assert_valid();)
}
PB_DS_CLASS_T_DEC
void
PB_DS_CLASS_C_DEC::
notify_externally_resized(size_type new_size)
{
m_resize_needed = false;
size_type new_grow_size =
size_type(m_load_max* new_size - 1);
size_type new_shrink_size =
size_type(m_load_min* new_size );
if (new_grow_size >= m_next_grow_size)
{
PB_DS_DBG_ASSERT(new_shrink_size > m_next_shrink_size);
m_next_grow_size = new_grow_size;
PB_DS_DBG_ONLY(assert_valid();)
#ifdef PB_DS_HT_MAP_RESIZE_TRACE_
std::cerr << "hlcrt::notify_externally_resized1 " <<
static_cast<unsigned long>(new_size) << " " <<
static_cast<unsigned long>(m_load_min) << " " <<
static_cast<unsigned long>(m_load_max) << " " <<
static_cast<unsigned long>(m_next_shrink_size) << " " <<
static_cast<unsigned long>(m_next_grow_size) << " " << std::endl;
#endif // #ifdef PB_DS_HT_MAP_RESIZE_TRACE_
return;
}
PB_DS_DBG_ASSERT(new_shrink_size <= m_next_shrink_size);
m_next_shrink_size = new_shrink_size;
#ifdef PB_DS_HT_MAP_RESIZE_TRACE_
std::cerr << "hlcrt::notify_externally_resized2 " <<
static_cast<unsigned long>(new_size) << " " <<
static_cast<unsigned long>(m_load_min) << " " <<
static_cast<unsigned long>(m_load_max) << " " <<
static_cast<unsigned long>(m_next_shrink_size) << " " <<
static_cast<unsigned long>(m_next_grow_size) << " " << std::endl;
#endif // #ifdef PB_DS_HT_MAP_RESIZE_TRACE_
PB_DS_DBG_ONLY(assert_valid();)
}
PB_DS_CLASS_T_DEC
void
PB_DS_CLASS_C_DEC::
notify_cleared()
{
PB_DS_DBG_ONLY(assert_valid();)
size_base::set_size(0);
m_resize_needed = (0 < m_next_shrink_size);
PB_DS_DBG_ONLY(assert_valid();)
}
PB_DS_CLASS_T_DEC
void
PB_DS_CLASS_C_DEC::
swap(PB_DS_CLASS_C_DEC& other)
{
PB_DS_DBG_ONLY(assert_valid();)
PB_DS_DBG_ONLY(other.assert_valid();)
size_base::swap(other);
std::swap(m_load_min, other.m_load_min);
std::swap(m_load_max, other.m_load_max);
std::swap(m_resize_needed, other.m_resize_needed);
std::swap(m_next_grow_size, other.m_next_grow_size);
std::swap(m_next_shrink_size, other.m_next_shrink_size);
PB_DS_DBG_ONLY(assert_valid();)
PB_DS_DBG_ONLY(other.assert_valid();)
}
PB_DS_CLASS_T_DEC
inline std::pair<float, float>
PB_DS_CLASS_C_DEC::
get_loads() const
{
PB_DS_STATIC_ASSERT(access, external_load_access);
return (std::make_pair(m_load_min, m_load_max));
}
PB_DS_CLASS_T_DEC
void
PB_DS_CLASS_C_DEC::
set_loads(std::pair<float, float> load_pair)
{
PB_DS_STATIC_ASSERT(access, external_load_access);
const float old_load_min = m_load_min;
const float old_load_max = m_load_max;
const size_type old_next_shrink_size = m_next_shrink_size;
const size_type old_next_grow_size = m_next_grow_size;
const bool old_resize_needed = m_resize_needed;
try
{
m_load_min = load_pair.first;
m_load_max = load_pair.second;
do_resize(static_cast<size_type>(
size_base::get_size() / ((m_load_min + m_load_max) / 2)));
}
catch(...)
{
m_load_min = old_load_min;
m_load_max = old_load_max;
m_next_shrink_size = old_next_shrink_size;
m_next_grow_size = old_next_grow_size;
m_resize_needed = old_resize_needed;
throw;
}
}
PB_DS_CLASS_T_DEC
void
PB_DS_CLASS_C_DEC::
do_resize(size_type /*new_size*/)
{
abort();
}
#ifdef PB_DS_HASH_POLICY_DEBUG
PB_DS_CLASS_T_DEC
void
PB_DS_CLASS_C_DEC::
assert_valid() const
{
PB_DS_DBG_ASSERT(m_load_max > m_load_min);
PB_DS_DBG_ASSERT(m_next_grow_size >= m_next_shrink_size);
}
#endif // #ifdef PB_DS_HASH_POLICY_DEBUG
#undef PB_DS_STATIC_ASSERT
|
