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
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
|
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
<title>Acknowledgements, notes and links</title>
<link rel="stylesheet" href="../../../doc/src/boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets V1.78.1">
<link rel="home" href="../index.html" title="The Boost C++ Libraries BoostBook Documentation Subset">
<link rel="up" href="../interprocess.html" title="Chapter 14. Boost.Interprocess">
<link rel="prev" href="customizing_interprocess.html" title="Customizing Boost.Interprocess">
<link rel="next" href="indexes_reference.html" title="Indexes and Reference">
</head>
<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
<table cellpadding="2" width="100%"><tr>
<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../boost.png"></td>
<td align="center"><a href="../../../index.html">Home</a></td>
<td align="center"><a href="../../../libs/libraries.htm">Libraries</a></td>
<td align="center"><a href="http://www.boost.org/users/people.html">People</a></td>
<td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td>
<td align="center"><a href="../../../more/index.htm">More</a></td>
</tr></table>
<hr>
<div class="spirit-nav">
<a accesskey="p" href="customizing_interprocess.html"><img src="../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../interprocess.html"><img src="../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../index.html"><img src="../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="indexes_reference.html"><img src="../../../doc/src/images/next.png" alt="Next"></a>
</div>
<div class="section">
<div class="titlepage"><div><div><h2 class="title" style="clear: both">
<a name="interprocess.acknowledgements_notes"></a><a class="link" href="acknowledgements_notes.html" title="Acknowledgements, notes and links">Acknowledgements,
notes and links</a>
</h2></div></div></div>
<div class="toc"><dl class="toc">
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.notes">Notes</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.thanks_to">Thanks
to...</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes">Release
Notes</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.books_and_links">Books
and interesting links</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.future_improvements">Future
improvements...</a></span></dt>
</dl></div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="interprocess.acknowledgements_notes.notes"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.notes" title="Notes">Notes</a>
</h3></div></div></div>
<div class="toc"><dl class="toc">
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.notes.notes_windows">Notes
for Windows users</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.notes.notes_linux">Notes
for Linux users</a></span></dt>
</dl></div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.notes.notes_windows"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.notes.notes_windows" title="Notes for Windows users">Notes
for Windows users</a>
</h4></div></div></div>
<div class="toc"><dl class="toc">
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.notes.notes_windows.notes_windows_com_init">COM
Initialization</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.notes.notes_windows.notes_windows_shm_folder">Shared
memory emulation folder</a></span></dt>
</dl></div>
<div class="section">
<div class="titlepage"><div><div><h5 class="title">
<a name="interprocess.acknowledgements_notes.notes.notes_windows.notes_windows_com_init"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.notes.notes_windows.notes_windows_com_init" title="COM Initialization">COM
Initialization</a>
</h5></div></div></div>
<p>
<span class="bold"><strong>Boost.Interprocess</strong></span> uses the Windows
COM library to implement some features and initializes it with concurrency
model <code class="computeroutput"><span class="identifier">COINIT_APARTMENTTHREADED</span></code>.
If the COM library was already initialized by the calling thread for
another concurrency model, <span class="bold"><strong>Boost.Interprocess</strong></span>
handles this gracefully and uses COM calls for the already initialized
model. If for some reason, you want <span class="bold"><strong>Boost.Interprocess</strong></span>
to initialize the COM library with another model, define the macro <code class="computeroutput"><span class="identifier">BOOST_INTERPROCESS_WINDOWS_COINIT_MODEL</span></code>
before including <span class="bold"><strong>Boost.Interprocess</strong></span>
to one of these values:
</p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
<code class="computeroutput"><span class="identifier">COINIT_APARTMENTTHREADED_BIPC</span></code>
</li>
<li class="listitem">
<code class="computeroutput"><span class="identifier">COINIT_MULTITHREADED_BIPC</span></code>
</li>
<li class="listitem">
<code class="computeroutput"><span class="identifier">COINIT_DISABLE_OLE1DDE_BIPC</span></code>
</li>
<li class="listitem">
<code class="computeroutput"><span class="identifier">COINIT_SPEED_OVER_MEMORY_BIPC</span></code>
</li>
</ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h5 class="title">
<a name="interprocess.acknowledgements_notes.notes.notes_windows.notes_windows_shm_folder"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.notes.notes_windows.notes_windows_shm_folder" title="Shared memory emulation folder">Shared
memory emulation folder</a>
</h5></div></div></div>
<p>
Shared memory (<code class="computeroutput"><span class="identifier">shared_memory_object</span></code>)
is implemented in windows using memory mapped files, placed in a directory
in the shared documents folder (<code class="computeroutput"><span class="identifier">SOFTWARE</span><span class="special">\</span><span class="identifier">Microsoft</span><span class="special">\</span><span class="identifier">Windows</span><span class="special">\</span><span class="identifier">CurrentVersion</span><span class="special">\</span><span class="identifier">Explorer</span><span class="special">\</span><span class="identifier">Shell</span> <span class="identifier">Folders</span><span class="special">\</span><span class="identifier">Common</span> <span class="identifier">AppData</span></code>).
This directory name is the last bootup time (obtained via COM calls),
so that each bootup shared memory is created in a new folder obtaining
kernel persistence shared memory.
</p>
<p>
Unfortunately, due to COM implementation related errors, in Boost 1.48
& Boost 1.49 the bootup-time folder was dumped and files were directly
created in shared documents folder, reverting to filesystem persistence
shared memory. Boost 1.50 fixed those issues and recovered bootup time
directory and kernel persistence. If you need to reproduce Boost 1.48
& Boost 1.49 behaviour to communicate with applications compiled
with that version, comment <code class="computeroutput"><span class="preprocessor">#define</span>
<span class="identifier">BOOST_INTERPROCESS_HAS_KERNEL_BOOTTIME</span></code>
directive in the Windows configuration part of <code class="computeroutput"><span class="identifier">boost</span><span class="special">/</span><span class="identifier">interprocess</span><span class="special">/</span><span class="identifier">detail</span><span class="special">/</span><span class="identifier">workaround</span><span class="special">.</span><span class="identifier">hpp</span></code>.
</p>
</div>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.notes.notes_linux"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.notes.notes_linux" title="Notes for Linux users">Notes
for Linux users</a>
</h4></div></div></div>
<div class="toc"><dl class="toc"><dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.notes.notes_linux.notes_linux_overcommit">Overcommit</a></span></dt></dl></div>
<div class="section">
<div class="titlepage"><div><div><h5 class="title">
<a name="interprocess.acknowledgements_notes.notes.notes_linux.notes_linux_overcommit"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.notes.notes_linux.notes_linux_overcommit" title="Overcommit">Overcommit</a>
</h5></div></div></div>
<p>
The committed address space is the total amount of virtual memory (swap
or physical memory/RAM) that the kernel might have to supply if all applications
decide to access all of the memory they've requested from the kernel.
By default, Linux allows processes to commit more virtual memory than
available in the system. If that memory is not accessed, no physical
memory + swap is actually used.
</p>
<p>
The reason for this behaviour is that Linux tries to optimize memory
usage on forked processes; fork() creates a full copy of the process
space, but with overcommitted memory, in this new forked instance only
pages which have been written to actually need to be allocated by the
kernel. If applications access more memory than available, then the kernel
must free memory in the hard way: the OOM (Out Of Memory)-killer picks
some processes to kill in order to recover memory.
</p>
<p>
<span class="bold"><strong>Boost.Interprocess</strong></span> has no way to change
this behaviour and users might suffer the OOM-killer when accessing shared
memory. According to the <a href="http://www.kernel.org/doc/Documentation/vm/overcommit-accounting" target="_top">Kernel
documentation</a>, the Linux kernel supports several overcommit modes.
If you need non-kill guarantees in your application, you should change
this overcommit behaviour.
</p>
</div>
</div>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="interprocess.acknowledgements_notes.thanks_to"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.thanks_to" title="Thanks to...">Thanks
to...</a>
</h3></div></div></div>
<div class="toc"><dl class="toc"><dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.thanks_to.thanks_to_people">People</a></span></dt></dl></div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.thanks_to.thanks_to_people"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.thanks_to.thanks_to_people" title="People">People</a>
</h4></div></div></div>
<p>
Many people have contributed with ideas and revisions, so this is the place
to thank them:
</p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
Thanks to all people who have shown interest in the library and have
downloaded and tested the snapshots.
</li>
<li class="listitem">
Thanks to <span class="bold"><strong>Francis Andre</strong></span> and <span class="bold"><strong>Anders Hybertz</strong></span> for their ideas and suggestions.
Many of them are not implemented yet but I hope to include them when
library gets some stability.
</li>
<li class="listitem">
Thanks to <span class="bold"><strong>Matt Doyle</strong></span>, <span class="bold"><strong>Steve
LoBasso</strong></span>, <span class="bold"><strong>Glenn Schrader</strong></span>,
<span class="bold"><strong>Hiang Swee Chiang</strong></span>, <span class="bold"><strong>Phil
Endecott</strong></span>, <span class="bold"><strong>Rene Rivera</strong></span>,
<span class="bold"><strong>Harold Pirtle</strong></span>, <span class="bold"><strong>Paul
Ryan</strong></span>, <span class="bold"><strong>Shumin Wu</strong></span>, <span class="bold"><strong>Michal Wozniak</strong></span>, <span class="bold"><strong>Peter
Johnson</strong></span>, <span class="bold"><strong>Alex Ott</strong></span>, <span class="bold"><strong>Shane Guillory</strong></span>, <span class="bold"><strong>Steven
Wooding</strong></span> and <span class="bold"><strong>Kim Barrett</strong></span>
for their bug fixes and library testing.
</li>
<li class="listitem">
Thanks to <span class="bold"><strong>Martin Adrian</strong></span> who suggested
the use of Interprocess framework for user defined buffers.
</li>
<li class="listitem">
Thanks to <span class="bold"><strong>Synge Todo</strong></span> for his boostbook-doxygen
patch to improve Interprocess documentation.
</li>
<li class="listitem">
Thanks to <span class="bold"><strong>Olaf Krzikalla</strong></span> for his Intrusive
library. I have taken some ideas to improve red black tree implementation
from his library.
</li>
<li class="listitem">
Thanks to <span class="bold"><strong>Daniel James</strong></span> for his unordered_map/set
family and his help with allocators. His great unordered implementation
has been a reference to design exception safe containers.
</li>
<li class="listitem">
Thanks to <span class="bold"><strong>Howard Hinnant</strong></span> for his amazing
help, specially explaining allocator swapping, move semantics and for
developing upgradable mutex and lock transfer features.
</li>
<li class="listitem">
Thanks to <span class="bold"><strong>Pavel Vozenilek</strong></span> for his
continuous review process, suggestions, code and help. He is the major
supporter of Interprocess library. The library has grown with his many
and great advices.
</li>
<li class="listitem">
And finally, thank you to all Boosters. <span class="bold"><strong>Long
live to C++!</strong></span>
</li>
</ul></div>
</div>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="interprocess.acknowledgements_notes.release_notes"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes" title="Release Notes">Release
Notes</a>
</h3></div></div></div>
<div class="toc"><dl class="toc">
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_55_00">Boost
1.55 Release</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_54_00">Boost
1.54 Release</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_53_00">Boost
1.53 Release</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_52_00">Boost
1.52 Release</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_51_00">Boost
1.51 Release</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_50_00">Boost
1.50 Release</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_49_00">Boost
1.49 Release</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_48_00">Boost
1.48 Release</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_46_00">Boost
1.46 Release</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_45_00">Boost
1.45 Release</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_41_00">Boost
1.41 Release</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_40_00">Boost
1.40 Release</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_39_00">Boost
1.39 Release</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_38_00">Boost
1.38 Release</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_37_00">Boost
1.37 Release</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_36_00">Boost
1.36 Release</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_35_00">Boost
1.35 Release</a></span></dt>
</dl></div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_55_00"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_55_00" title="Boost 1.55 Release">Boost
1.55 Release</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem">
Fixed bugs <a href="https://svn.boost.org/trac/boost/ticket/7156" target="_top">#7156</a>,
<a href="https://svn.boost.org/trac/boost/ticket/7164" target="_top">#7164</a>,
<a href="https://svn.boost.org/trac/boost/ticket/8277" target="_top">#8277</a>,
<a href="https://svn.boost.org/trac/boost/ticket/8976" target="_top">#8976</a>,
<a href="https://svn.boost.org/trac/boost/ticket/9065" target="_top">#9065</a>,
<a href="https://svn.boost.org/trac/boost/ticket/9073" target="_top">#9073</a>,
<a href="https://svn.boost.org/trac/boost/ticket/9008" target="_top">#9008</a>.
</li></ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_54_00"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_54_00" title="Boost 1.54 Release">Boost
1.54 Release</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
Added support for platform-specific flags to mapped_region (ticket
#8030)
</li>
<li class="listitem">
Fixed bugs <a href="https://svn.boost.org/trac/boost/ticket/7484" target="_top">#7484</a>,
<a href="https://svn.boost.org/trac/boost/ticket/7598" target="_top">#7598</a>,
<a href="https://svn.boost.org/trac/boost/ticket/7682" target="_top">#7682</a>,
<a href="https://svn.boost.org/trac/boost/ticket/7923" target="_top">#7923</a>,
<a href="https://svn.boost.org/trac/boost/ticket/7924" target="_top">#7924</a>,
<a href="https://svn.boost.org/trac/boost/ticket/7928" target="_top">#7928</a>,
<a href="https://svn.boost.org/trac/boost/ticket/7936" target="_top">#7936</a>,
<a href="https://svn.boost.org/trac/boost/ticket/8521" target="_top">#8521</a>,
<a href="https://svn.boost.org/trac/boost/ticket/8595" target="_top">#8595</a>.
</li>
<li class="listitem">
<span class="bold"><strong>ABI breaking</strong></span>: Changed bootstamp function
in Windows to use EventLog service start time as system bootup time.
Previously used <code class="computeroutput"><span class="identifier">LastBootupTime</span></code>
from WMI was unstable with time synchronization and hibernation and
unusable in practice. If you really need to obtain pre Boost 1.54 behaviour
define <code class="computeroutput"><span class="identifier">BOOST_INTERPROCESS_BOOTSTAMP_IS_LASTBOOTUPTIME</span></code>
from command line or <code class="computeroutput"><span class="identifier">detail</span><span class="special">/</span><span class="identifier">workaround</span><span class="special">.</span><span class="identifier">hpp</span></code>.
</li>
</ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_53_00"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_53_00" title="Boost 1.53 Release">Boost
1.53 Release</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
Fixed GCC -Wshadow warnings.
</li>
<li class="listitem">
Experimental multiple allocation interface improved and changed again.
Still unstable.
</li>
<li class="listitem">
Replaced deprecated BOOST_NO_XXXX with newer BOOST_NO_CXX11_XXX macros.
</li>
<li class="listitem">
<span class="bold"><strong>ABI breaking</strong></span>: changed node pool allocators
internals for improved efficiency.
</li>
<li class="listitem">
Fixed bug <a href="https://svn.boost.org/trac/boost/ticket/7795" target="_top">#7795</a>.
</li>
</ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_52_00"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_52_00" title="Boost 1.52 Release">Boost
1.52 Release</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
Added <code class="computeroutput"><span class="identifier">shrink_by</span></code> and
<code class="computeroutput"><span class="identifier">advise</span></code> functions in
<code class="computeroutput"><span class="identifier">mapped_region</span></code>.
</li>
<li class="listitem">
<span class="bold"><strong>ABI breaking:</strong></span> Reimplemented <code class="computeroutput"><span class="identifier">message_queue</span></code> with a circular buffer
index (the old behavior used an ordered array, leading to excessive
copies). This should greatly increase performance but breaks ABI. Old
behaviour/ABI can be used undefining macro <code class="computeroutput"><span class="identifier">BOOST_INTERPROCESS_MSG_QUEUE_CIRCULAR_INDEX</span></code>
in <code class="computeroutput"><span class="identifier">boost</span><span class="special">/</span><span class="identifier">interprocess</span><span class="special">/</span><span class="identifier">detail</span><span class="special">/</span><span class="identifier">workaround</span><span class="special">.</span><span class="identifier">hpp</span></code>
</li>
<li class="listitem">
Improved <code class="computeroutput"><span class="identifier">message_queue</span></code>
insertion time avoiding priority search for common cases (both array
and circular buffer configurations).
</li>
<li class="listitem">
Implemented <code class="computeroutput"><span class="identifier">interproces_sharable_mutex</span></code>
and <code class="computeroutput"><span class="identifier">interproces_condition_any</span></code>.
</li>
<li class="listitem">
Improved <code class="computeroutput"><span class="identifier">offset_ptr</span></code>
performance.
</li>
<li class="listitem">
Added integer overflow checks.
</li>
</ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_51_00"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_51_00" title="Boost 1.51 Release">Boost
1.51 Release</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
Synchronous and asynchronous flushing for <code class="computeroutput"><span class="identifier">mapped_region</span><span class="special">::</span><span class="identifier">flush</span></code>.
</li>
<li class="listitem">
<span class="bold"><strong>Source & ABI breaking</strong></span>: Removed
<code class="computeroutput"><span class="identifier">get_offset</span></code> method from
<code class="computeroutput"><span class="identifier">mapped_region</span></code> as it
has no practical utility and <code class="computeroutput"><span class="identifier">m_offset</span></code>
member was not for anything else.
</li>
<li class="listitem">
<span class="bold"><strong>Source & ABI breaking</strong></span>: Removed
<code class="computeroutput"><span class="identifier">flush</span></code> from <code class="computeroutput"><span class="identifier">managed_shared_memory</span></code>. as it is unspecified
according to POSIX: <a href="http://pubs.opengroup.org/onlinepubs/009695399/functions/msync.html" target="_top"><span class="emphasis"><em>"The
effect of msync() on a shared memory object or a typed memory object
is unspecified"</em></span> </a>.
</li>
<li class="listitem">
Fixed bug <a href="https://svn.boost.org/trac/boost/ticket/7152" target="_top">#7152</a>,
</li>
</ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_50_00"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_50_00" title="Boost 1.50 Release">Boost
1.50 Release</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
Fixed bugs <a href="https://svn.boost.org/trac/boost/ticket/3750" target="_top">#3750</a>,
<a href="https://svn.boost.org/trac/boost/ticket/6727" target="_top">#6727</a>,
<a href="https://svn.boost.org/trac/boost/ticket/6648" target="_top">#6648</a>,
</li>
<li class="listitem">
Shared memory in windows has again kernel persistence: kernel bootstamp
and WMI has received some fixes and optimizations. This causes incompatibility
with Boost 1.48 and 1.49 but the user can comment <code class="computeroutput"><span class="preprocessor">#define</span>
<span class="identifier">BOOST_INTERPROCESS_HAS_KERNEL_BOOTTIME</span></code>
in the windows configuration part to get Boost 1.48 & Boost 1.49
behaviour.
</li>
</ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_49_00"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_49_00" title="Boost 1.49 Release">Boost
1.49 Release</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
Fixed bugs <a href="https://svn.boost.org/trac/boost/ticket/6531" target="_top">#6531</a>,
<a href="https://svn.boost.org/trac/boost/ticket/6412" target="_top">#6412</a>,
<a href="https://svn.boost.org/trac/boost/ticket/6398" target="_top">#6398</a>,
<a href="https://svn.boost.org/trac/boost/ticket/6340" target="_top">#6340</a>,
<a href="https://svn.boost.org/trac/boost/ticket/6319" target="_top">#6319</a>,
<a href="https://svn.boost.org/trac/boost/ticket/6287" target="_top">#6287</a>,
<a href="https://svn.boost.org/trac/boost/ticket/6265" target="_top">#6265</a>,
<a href="https://svn.boost.org/trac/boost/ticket/6233" target="_top">#6233</a>,
<a href="https://svn.boost.org/trac/boost/ticket/6147" target="_top">#6147</a>,
<a href="https://svn.boost.org/trac/boost/ticket/6134" target="_top">#6134</a>,
<a href="https://svn.boost.org/trac/boost/ticket/6058" target="_top">#6058</a>,
<a href="https://svn.boost.org/trac/boost/ticket/6054" target="_top">#6054</a>,
<a href="https://svn.boost.org/trac/boost/ticket/5772" target="_top">#5772</a>,
<a href="https://svn.boost.org/trac/boost/ticket/5738" target="_top">#5738</a>,
<a href="https://svn.boost.org/trac/boost/ticket/5622" target="_top">#5622</a>,
<a href="https://svn.boost.org/trac/boost/ticket/5552" target="_top">#5552</a>,
<a href="https://svn.boost.org/trac/boost/ticket/5518" target="_top">#5518</a>,
<a href="https://svn.boost.org/trac/boost/ticket/4655" target="_top">#4655</a>,
<a href="https://svn.boost.org/trac/boost/ticket/4452" target="_top">#4452</a>,
<a href="https://svn.boost.org/trac/boost/ticket/4383" target="_top">#4383</a>,
<a href="https://svn.boost.org/trac/boost/ticket/4297" target="_top">#4297</a>.
</li>
<li class="listitem">
Fixed timed functions in mutex implementations to fulfill POSIX requirements:
<span class="emphasis"><em>Under no circumstance shall the function fail with a timeout
if the mutex can be locked immediately. The validity of the abs_timeout
parameter need not be checked if the mutex can be locked immediately.</em></span>
</li>
</ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_48_00"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_48_00" title="Boost 1.48 Release">Boost
1.48 Release</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
Fixed bugs <a href="https://svn.boost.org/trac/boost/ticket/2796" target="_top">#2796</a>,
<a href="https://svn.boost.org/trac/boost/ticket/4031" target="_top">#4031</a>,
<a href="https://svn.boost.org/trac/boost/ticket/4251" target="_top">#4251</a>,
<a href="https://svn.boost.org/trac/boost/ticket/4452" target="_top">#4452</a>,
<a href="https://svn.boost.org/trac/boost/ticket/4895" target="_top">#4895</a>,
<a href="https://svn.boost.org/trac/boost/ticket/5077" target="_top">#5077</a>,
<a href="https://svn.boost.org/trac/boost/ticket/5120" target="_top">#5120</a>,
<a href="https://svn.boost.org/trac/boost/ticket/5123" target="_top">#5123</a>,
<a href="https://svn.boost.org/trac/boost/ticket/5230" target="_top">#5230</a>,
<a href="https://svn.boost.org/trac/boost/ticket/5197" target="_top">#5197</a>,
<a href="https://svn.boost.org/trac/boost/ticket/5287" target="_top">#5287</a>,
<a href="https://svn.boost.org/trac/boost/ticket/5294" target="_top">#5294</a>,
<a href="https://svn.boost.org/trac/boost/ticket/5306" target="_top">#5306</a>,
<a href="https://svn.boost.org/trac/boost/ticket/5308" target="_top">#5308</a>,
<a href="https://svn.boost.org/trac/boost/ticket/5392" target="_top">#5392</a>,
<a href="https://svn.boost.org/trac/boost/ticket/5409" target="_top">#5409</a>,
</li>
<li class="listitem">
Added support to customize offset_ptr and allow creating custom managed
segments that might be shared between 32 and 64 bit processes.
</li>
<li class="listitem">
Shared memory in windows has again filesystem lifetime: kernel bootstamp
and WMI use to get a reliable timestamp was causing a lot of trouble.
</li>
</ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_46_00"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_46_00" title="Boost 1.46 Release">Boost
1.46 Release</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem">
Fixed bugs <a href="https://svn.boost.org/trac/boost/ticket/4557" target="_top">#4557</a>,
<a href="https://svn.boost.org/trac/boost/ticket/4979" target="_top">#4979</a>,
<a href="https://svn.boost.org/trac/boost/ticket/4907" target="_top">#4907</a>,
<a href="https://svn.boost.org/trac/boost/ticket/4895" target="_top">#4895</a>.
</li></ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_45_00"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_45_00" title="Boost 1.45 Release">Boost
1.45 Release</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
Fixed bugs <a href="https://svn.boost.org/trac/boost/ticket/1080" target="_top">#1080</a>,
<a href="https://svn.boost.org/trac/boost/ticket/3284" target="_top">#3284</a>,
<a href="https://svn.boost.org/trac/boost/ticket/3439" target="_top">#3439</a>,
<a href="https://svn.boost.org/trac/boost/ticket/3448" target="_top">#3448</a>,
<a href="https://svn.boost.org/trac/boost/ticket/3582" target="_top">#3582</a>,
<a href="https://svn.boost.org/trac/boost/ticket/3682" target="_top">#3682</a>,
<a href="https://svn.boost.org/trac/boost/ticket/3829" target="_top">#3829</a>,
<a href="https://svn.boost.org/trac/boost/ticket/3846" target="_top">#3846</a>,
<a href="https://svn.boost.org/trac/boost/ticket/3914" target="_top">#3914</a>,
<a href="https://svn.boost.org/trac/boost/ticket/3947" target="_top">#3947</a>,
<a href="https://svn.boost.org/trac/boost/ticket/3950" target="_top">#3950</a>,
<a href="https://svn.boost.org/trac/boost/ticket/3951" target="_top">#3951</a>,
<a href="https://svn.boost.org/trac/boost/ticket/3985" target="_top">#3985</a>,
<a href="https://svn.boost.org/trac/boost/ticket/4010" target="_top">#4010</a>,
<a href="https://svn.boost.org/trac/boost/ticket/4417" target="_top">#4417</a>,
<a href="https://svn.boost.org/trac/boost/ticket/4019" target="_top">#4019</a>,
<a href="https://svn.boost.org/trac/boost/ticket/4039" target="_top">#4039</a>,
<a href="https://svn.boost.org/trac/boost/ticket/4218" target="_top">#4218</a>,
<a href="https://svn.boost.org/trac/boost/ticket/4230" target="_top">#4230</a>,
<a href="https://svn.boost.org/trac/boost/ticket/4250" target="_top">#4250</a>,
<a href="https://svn.boost.org/trac/boost/ticket/4297" target="_top">#4297</a>,
<a href="https://svn.boost.org/trac/boost/ticket/4350" target="_top">#4350</a>,
<a href="https://svn.boost.org/trac/boost/ticket/4352" target="_top">#4352</a>,
<a href="https://svn.boost.org/trac/boost/ticket/4426" target="_top">#4426</a>,
<a href="https://svn.boost.org/trac/boost/ticket/4516" target="_top">#4516</a>,
<a href="https://svn.boost.org/trac/boost/ticket/4524" target="_top">#4524</a>,
<a href="https://svn.boost.org/trac/boost/ticket/4557" target="_top">#4557</a>,
<a href="https://svn.boost.org/trac/boost/ticket/4606" target="_top">#4606</a>,
<a href="https://svn.boost.org/trac/boost/ticket/4685" target="_top">#4685</a>,
<a href="https://svn.boost.org/trac/boost/ticket/4694" target="_top">#4694</a>.
</li>
<li class="listitem">
Added support for standard rvalue reference move semantics (tested
on GCC 4.5 and VC10).
</li>
<li class="listitem">
Permissions can be detailed for interprocess named resources.
</li>
<li class="listitem">
<code class="computeroutput"><span class="identifier">mapped_region</span><span class="special">::</span><span class="identifier">flush</span></code> initiates disk flushing but
does not guarantee it's completed when returns, since it is not portable.
</li>
<li class="listitem">
FreeBSD and MacOS now use posix semaphores to implement named semaphores
and mutex.
</li>
</ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_41_00"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_41_00" title="Boost 1.41 Release">Boost
1.41 Release</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
Support for POSIX shared memory in Mac OS.
</li>
<li class="listitem">
<span class="bold"><strong>ABI breaking</strong></span>: Generic <code class="computeroutput"><span class="identifier">semaphore</span></code> and <code class="computeroutput"><span class="identifier">named_semaphore</span></code>
now implemented more efficiently with atomic operations.
</li>
<li class="listitem">
More robust file opening in Windows platforms with active Anti-virus
software.
</li>
</ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_40_00"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_40_00" title="Boost 1.40 Release">Boost
1.40 Release</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
Windows shared memory is created in Shared Documents folder so that
it can be shared between services and processes
</li>
<li class="listitem">
Fixed bugs <a href="https://svn.boost.org/trac/boost/ticket/2967" target="_top">#2967</a>,
<a href="https://svn.boost.org/trac/boost/ticket/2973" target="_top">#2973</a>,
<a href="https://svn.boost.org/trac/boost/ticket/2992" target="_top">#2992</a>,
<a href="https://svn.boost.org/trac/boost/ticket/3138" target="_top">#3138</a>,
<a href="https://svn.boost.org/trac/boost/ticket/3166" target="_top">#3166</a>,
<a href="https://svn.boost.org/trac/boost/ticket/3205" target="_top">#3205</a>.
</li>
</ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_39_00"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_39_00" title="Boost 1.39 Release">Boost
1.39 Release</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
Added experimental <code class="computeroutput"><span class="identifier">stable_vector</span></code>
container.
</li>
<li class="listitem">
<code class="computeroutput"><span class="identifier">shared_memory_object</span><span class="special">::</span><span class="identifier">remove</span></code>
has now POSIX <code class="computeroutput"><span class="identifier">unlink</span></code>
semantics and <code class="computeroutput"><span class="identifier">file_mapping</span><span class="special">::</span><span class="identifier">remove</span></code>
was added to obtain POSIX <code class="computeroutput"><span class="identifier">unlink</span></code>
semantics with mapped files.
</li>
<li class="listitem">
Shared memory in windows has now kernel lifetime instead of filesystem
lifetime: shared memory will disappear when the system reboots.
</li>
<li class="listitem">
Updated move semantics.
</li>
<li class="listitem">
Fixed bugs <a href="https://svn.boost.org/trac/boost/ticket/2722" target="_top">#2722</a>,
<a href="https://svn.boost.org/trac/boost/ticket/2729" target="_top">#2729</a>,
<a href="https://svn.boost.org/trac/boost/ticket/2766" target="_top">#2766</a>,
<a href="https://svn.boost.org/trac/boost/ticket/1390" target="_top">#1390</a>,
<a href="https://svn.boost.org/trac/boost/ticket/2589" target="_top">#2589</a>,
</li>
</ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_38_00"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_38_00" title="Boost 1.38 Release">Boost
1.38 Release</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
Updated documentation to show rvalue-references funcions instead of
emulation functions.
</li>
<li class="listitem">
More non-copyable classes are now movable.
</li>
<li class="listitem">
Move-constructor and assignments now leave moved object in default-constructed
state instead of just swapping contents.
</li>
<li class="listitem">
Several bugfixes ( <a href="https://svn.boost.org/trac/boost/ticket/2391" target="_top">#2391</a>,
<a href="https://svn.boost.org/trac/boost/ticket/2431" target="_top">#2431</a>,
<a href="https://svn.boost.org/trac/boost/ticket/1390" target="_top">#1390</a>,
<a href="https://svn.boost.org/trac/boost/ticket/2570" target="_top">#2570</a>,
<a href="https://svn.boost.org/trac/boost/ticket/2528" target="_top">#2528</a>.
</li>
</ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_37_00"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_37_00" title="Boost 1.37 Release">Boost
1.37 Release</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
Containers can be used now in recursive types.
</li>
<li class="listitem">
Added <code class="computeroutput"><span class="identifier">BOOST_INTERPROCESS_FORCE_GENERIC_EMULATION</span></code>
macro option to force the use of generic emulation code for process-shared
synchronization primitives instead of native POSIX functions.
</li>
<li class="listitem">
Added placement insertion members to containers
</li>
<li class="listitem">
<code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">posix_time</span><span class="special">::</span><span class="identifier">pos_inf</span></code> value is now handled portably
for timed functions.
</li>
<li class="listitem">
Update some function parameters from <code class="computeroutput"><span class="identifier">iterator</span></code>
to <code class="computeroutput"><span class="identifier">const_iterator</span></code> in
containers to keep up with the draft of the next standard.
</li>
<li class="listitem">
Documentation fixes.
</li>
</ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_36_00"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_36_00" title="Boost 1.36 Release">Boost
1.36 Release</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
Added anonymous shared memory for UNIX systems.
</li>
<li class="listitem">
Fixed erroneous <code class="computeroutput"><span class="keyword">void</span></code> return
types from <code class="computeroutput"><span class="identifier">flat_map</span><span class="special">::</span><span class="identifier">erase</span><span class="special">()</span></code> functions.
</li>
<li class="listitem">
Fixed missing move semantics on managed memory classes.
</li>
<li class="listitem">
Added copy_on_write and open_read_only options for shared memory and
mapped file managed classes.
</li>
<li class="listitem">
<span class="bold"><strong>ABI breaking</strong></span>: Added to <code class="computeroutput"><span class="identifier">mapped_region</span></code> the mode used to create
it.
</li>
<li class="listitem">
Corrected instantiation errors in void allocators.
</li>
<li class="listitem">
<code class="computeroutput"><span class="identifier">shared_ptr</span></code> is movable
and supports aliasing.
</li>
</ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_35_00"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.release_notes.release_notes_boost_1_35_00" title="Boost 1.35 Release">Boost
1.35 Release</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
Added auxiliary utilities to ease the definition and construction of
<code class="computeroutput"><a class="link" href="../boost/interprocess/shared_ptr.html" title="Class template shared_ptr">shared_ptr</a></code>,
<code class="computeroutput"><a class="link" href="../boost/interprocess/weak_ptr.html" title="Class template weak_ptr">weak_ptr</a></code>
and <code class="computeroutput"><a class="link" href="../boost/interprocess/unique_ptr.html" title="Class template unique_ptr">unique_ptr</a></code>.
Added explanations and examples of these smart pointers in the documentation.
</li>
<li class="listitem">
Optimized vector:
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; ">
<li class="listitem">
1) Now works with raw pointers as much as possible when using
allocators defining <code class="computeroutput"><span class="identifier">pointer</span></code>
as an smart pointer. This increases performance and improves
compilation times.
</li>
<li class="listitem">
2) A bit of metaprogramming to avoid using move_iterator when
the type has trivial copy constructor or assignment and improve
performance.
</li>
<li class="listitem">
3) Changed custom algorithms with standard ones to take advantage
of optimized standard algorithms.
</li>
<li class="listitem">
4) Removed unused code.
</li>
</ul></div>
</li>
<li class="listitem">
<span class="bold"><strong>ABI breaking</strong></span>: Containers don't derive
from allocators, to avoid problems with allocators that might define
virtual functions with the same names as container member functions.
That would convert container functions in virtual functions and might
disallow some of them if the returned type does not lead to a covariant
return. Allocators are now stored as base classes of internal structs.
</li>
<li class="listitem">
Implemented <code class="computeroutput"><a class="link" href="../boost/interprocess/named_mutex.html" title="Class named_mutex">named_mutex</a></code>
and <code class="computeroutput"><a class="link" href="../boost/interprocess/named_semaphore.html" title="Class named_semaphore">named_semaphore</a></code>
with POSIX named semaphores in systems supporting that option. <code class="computeroutput"><a class="link" href="../boost/interprocess/named_condition.html" title="Class named_condition">named_condition</a></code>
has been accordingly changed to support interoperability with <code class="computeroutput"><a class="link" href="../boost/interprocess/named_mutex.html" title="Class named_mutex">named_mutex</a></code>.
</li>
<li class="listitem">
Reduced template bloat for node and adaptive allocators extracting
node implementation to a class that only depends on the memory algorithm,
instead of the segment manager + node size + node number...
</li>
<li class="listitem">
Fixed bug in <code class="computeroutput"><span class="identifier">mapped_region</span></code>
in UNIX when mapping address was provided but the region was mapped
in another address.
</li>
<li class="listitem">
Added <code class="computeroutput"><span class="identifier">aligned_allocate</span></code>
and <code class="computeroutput"><span class="identifier">allocate_many</span></code> functions
to managed memory segments.
</li>
<li class="listitem">
Improved documentation about managed memory segments.
</li>
<li class="listitem">
<span class="bold"><strong>Boost.Interprocess</strong></span> containers are
now documented in the Reference section.
</li>
<li class="listitem">
Correction of typos and documentation errors.
</li>
<li class="listitem">
Added <code class="computeroutput"><span class="identifier">get_instance_name</span></code>,
<code class="computeroutput"><span class="identifier">get_instance_length</span></code>
and <code class="computeroutput"><span class="identifier">get_instance_type</span></code>
functions to managed memory segments.
</li>
<li class="listitem">
Corrected suboptimal buffer expansion bug in <code class="computeroutput"><span class="identifier">rbtree_best_fit</span></code>.
</li>
<li class="listitem">
Added iteration of named and unique objects in a segment manager.
</li>
<li class="listitem">
Fixed leak in <code class="computeroutput">vector</code>.
</li>
<li class="listitem">
Added support for Solaris.
</li>
<li class="listitem">
Optimized <code class="computeroutput"><a class="link" href="../boost/interprocess/segment_manager.html" title="Class template segment_manager">segment_manager</a></code>
to avoid code bloat associated with templated instantiations.
</li>
<li class="listitem">
Fixed bug for UNIX: No slash ('/') was being added as the first character
for shared memory names, leading to errors in some UNIX systems.
</li>
<li class="listitem">
Fixed bug in VC-8.0: Broken function inlining in core offset_ptr functions.
</li>
<li class="listitem">
Code examples changed to use new BoostBook code import features.
</li>
<li class="listitem">
Added aligned memory allocation function to memory algorithms.
</li>
<li class="listitem">
Fixed bug in <code class="computeroutput"><span class="identifier">deque</span><span class="special">::</span><span class="identifier">clear</span><span class="special">()</span></code> and <code class="computeroutput"><span class="identifier">deque</span><span class="special">::</span><span class="identifier">erase</span><span class="special">()</span></code>, they were declared private.
</li>
<li class="listitem">
Fixed bug in <code class="computeroutput"><span class="identifier">deque</span><span class="special">::</span><span class="identifier">erase</span><span class="special">()</span></code>. Thanks to Steve LoBasso.
</li>
<li class="listitem">
Fixed bug in <code class="computeroutput"><span class="identifier">atomic_dec32</span><span class="special">()</span></code>. Thanks to Glenn Schrader.
</li>
<li class="listitem">
Improved (multi)map/(multi)set constructors taking iterators. Now those
have linear time if the iterator range is already sorted.
</li>
<li class="listitem">
<span class="bold"><strong>ABI breaking</strong></span>: (multi)map/(multi)set
now reduce their node size. The color bit is embedded in the parent
pointer. Now, the size of a node is the size of 3 pointers in most
systems. This optimization is activated for raw and <code class="computeroutput"><span class="identifier">offset_ptr</span></code>
pointers.
</li>
<li class="listitem">
(multi)map/(multi)set now reuse memory from old nodes in the assignment
operator.
</li>
<li class="listitem">
<span class="bold"><strong>ABI breaking</strong></span>: Implemented node-containers
based on intrusive containers. This saves code size, since many instantiations
share the same algorithms.
</li>
<li class="listitem">
Corrected code to be compilable with Visual C++ 8.0.
</li>
<li class="listitem">
Added function to zero free memory in memory algorithms and the segment
manager. This function is useful for security reasons and to improve
compression ratios for files created with <code class="computeroutput"><span class="identifier">managed_mapped_file</span></code>.
</li>
<li class="listitem">
Added support for intrusive index types in managed memory segments.
Intrusive indexes save extra memory allocations to allocate the index
since with just one allocation, we allocate room for the value, the
name and the hook to insert the object in the index.
</li>
<li class="listitem">
Created new index type: <span class="bold"><strong>iset_index</strong></span>.
It's an index based on an intrusive set (rb-tree).
</li>
<li class="listitem">
Created new index type: <span class="bold"><strong>iunordered_set_index</strong></span>.
It's an index based on a pseudo-intrusive unordered set (hash table).
</li>
<li class="listitem">
<span class="bold"><strong>ABI breaking</strong></span>: The intrusive index
<span class="bold"><strong>iset_index</strong></span> is now the default index
type.
</li>
<li class="listitem">
Optimized vector to take advantage of <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">has_trivial_destructor</span></code>.
This optimization avoids calling destructors of elements that have
a trivial destructor.
</li>
<li class="listitem">
Optimized vector to take advantage of <code class="computeroutput"><span class="identifier">has_trivial_destructor_after_move</span></code>
trait. This optimization avoids calling destructors of elements that
have a trivial destructor if the element has been moved (which is the
case of many movable types). This trick was provided by Howard Hinnant.
</li>
<li class="listitem">
Added security check to avoid integer overflow bug in allocators and
named construction functions.
</li>
<li class="listitem">
Added alignment checks to forward and backwards expansion functions.
</li>
<li class="listitem">
Fixed bug in atomic functions for PPC.
</li>
<li class="listitem">
Fixed race-condition error when creating and opening a managed segment.
</li>
<li class="listitem">
Added adaptive pools.
</li>
<li class="listitem">
<span class="bold"><strong>Source breaking</strong></span>: Changed node allocators'
template parameter order to make them easier to use.
</li>
<li class="listitem">
Added support for native windows shared memory.
</li>
<li class="listitem">
Added more tests.
</li>
<li class="listitem">
Corrected the presence of private functions in the reference section.
</li>
<li class="listitem">
Added function (<code class="computeroutput"><span class="identifier">deallocate_free_chunks</span><span class="special">()</span></code>) to manually deallocate completely
free chunks from node allocators.
</li>
<li class="listitem">
Implemented N1780 proposal to LWG issue 233: <span class="emphasis"><em>Insertion hints
in associative containers</em></span> in interprocess <code class="computeroutput">multiset</code>
and <code class="computeroutput">multimap</code>
classes.
</li>
<li class="listitem">
<span class="bold"><strong>Source breaking</strong></span>: A shared memory object
is now used including <code class="computeroutput"><span class="identifier">shared_memory_object</span><span class="special">.</span><span class="identifier">hpp</span></code>
header instead of <code class="computeroutput"><span class="identifier">shared</span>
<span class="identifier">memory</span><span class="special">.</span><span class="identifier">hpp</span></code>.
</li>
<li class="listitem">
<span class="bold"><strong>ABI breaking</strong></span>: Changed global mutex
when initializing managed shared memory and memory mapped files. This
change tries to minimize deadlocks.
</li>
<li class="listitem">
<span class="bold"><strong>Source breaking</strong></span>: Changed shared memory,
memory mapped files and mapped region's open mode to a single <code class="computeroutput"><span class="identifier">mode_t</span></code> type.
</li>
<li class="listitem">
Added extra WIN32_LEAN_AND_MEAN before including DateTime headers to
avoid socket redefinition errors when using Interprocess and Asio in
windows.
</li>
<li class="listitem">
<span class="bold"><strong>ABI breaking</strong></span>: <code class="computeroutput"><span class="identifier">mapped_region</span></code>
constructor no longer requires classes derived from memory_mappable,
but classes must fulfill the MemoryMappable concept.
</li>
<li class="listitem">
Added in-place reallocation capabilities to basic_string.
</li>
<li class="listitem">
<span class="bold"><strong>ABI breaking</strong></span>: Reimplemented and optimized
small string optimization. The narrow string class has zero byte overhead
with an internal 11 byte buffer in 32 systems!
</li>
<li class="listitem">
Added move semantics to containers. Improves performance when using
containers of containers.
</li>
<li class="listitem">
<span class="bold"><strong>ABI breaking</strong></span>: End nodes of node containers
(list, slist, map/set) are now embedded in the containers instead of
allocated using the allocator. This allows no-throw move-constructors
and improves performance.
</li>
<li class="listitem">
<span class="bold"><strong>ABI breaking</strong></span>: <span class="bold"><strong>slist</strong></span>
and <span class="bold"><strong>list</strong></span> containers now have constant-time
<span class="emphasis"><em>size()</em></span> function. The size of the container is
added as a member.
</li>
</ul></div>
</div>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="interprocess.acknowledgements_notes.books_and_links"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.books_and_links" title="Books and interesting links">Books
and interesting links</a>
</h3></div></div></div>
<div class="toc"><dl class="toc">
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.books_and_links.references_books">Books</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.books_and_links.references_links">Links</a></span></dt>
</dl></div>
<p>
Some useful references about the C++ programming language, C++ internals,
shared memory, allocators and containers used to design <span class="bold"><strong>Boost.Interprocess</strong></span>.
</p>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.books_and_links.references_books"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.books_and_links.references_books" title="Books">Books</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
Great book about multithreading, and POSIX: <span class="bold"><strong><span class="emphasis"><em>"Programming
with Posix Threads"</em></span></strong></span>, <span class="bold"><strong>David
R. Butenhof</strong></span>
</li>
<li class="listitem">
The UNIX inter-process bible: <span class="bold"><strong><span class="emphasis"><em>"UNIX
Network Programming, Volume 2: Interprocess Communications"</em></span></strong></span>,
<span class="bold"><strong>W. Richard Stevens</strong></span>
</li>
<li class="listitem">
Current STL allocator issues: <span class="bold"><strong><span class="emphasis"><em>"Effective
STL"</em></span></strong></span>, <span class="bold"><strong>Scott Meyers</strong></span>
</li>
<li class="listitem">
My C++ bible: <span class="bold"><strong><span class="emphasis"><em>"Thinking in C++,
Volume 1 & 2"</em></span></strong></span>, <span class="bold"><strong>Bruce
Eckel and Chuck Allison</strong></span>
</li>
<li class="listitem">
The book every C++ programmer should read: <span class="bold"><strong><span class="emphasis"><em>"Inside
the C++ Object Model"</em></span></strong></span>, <span class="bold"><strong>Stanley
B. Lippman</strong></span>
</li>
<li class="listitem">
A must-read: <span class="bold"><strong><span class="emphasis"><em>"ISO/IEC TR 18015:
Technical Report on C++ Performance"</em></span></strong></span>, <span class="bold"><strong>ISO WG21-SC22 members.</strong></span>
</li>
</ul></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.books_and_links.references_links"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.books_and_links.references_links" title="Links">Links</a>
</h4></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
A framework to put the STL in shared memory: <a href="http://allocator.sourceforge.net/" target="_top"><span class="emphasis"><em>"A
C++ Standard Allocator for the Standard Template Library"</em></span>
</a>.
</li>
<li class="listitem">
Instantiating C++ objects in shared memory: <a href="http://www.cs.ubc.ca/local/reading/proceedings/cascon94/htm/english/abs/hon.htm" target="_top"><span class="emphasis"><em>"Using
objects in shared memory for C++ application"</em></span> </a>.
</li>
<li class="listitem">
A shared memory allocator and relative pointer: <a href="http://home.earthlink.net/~joshwalker1/writing/SharedMemory.html" target="_top"><span class="emphasis"><em>"Taming
Shared Memory"</em></span> </a>.
</li>
</ul></div>
</div>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="interprocess.acknowledgements_notes.future_improvements"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.future_improvements" title="Future improvements...">Future
improvements...</a>
</h3></div></div></div>
<div class="toc"><dl class="toc">
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.future_improvements.win32_sync">Win32
synchronization is too basic</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.future_improvements.future_objectnames">Use
of wide character names on Boost.Interprocess basic resources</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.future_improvements.future_security">Security
attributes</a></span></dt>
<dt><span class="section"><a href="acknowledgements_notes.html#interprocess.acknowledgements_notes.future_improvements.future_ipc">Future
inter-process communications</a></span></dt>
</dl></div>
<p>
There are some Interprocess features that I would like to implement and some
<span class="bold"><strong>Boost.Interprocess</strong></span> code that can be much
better. Let's see some ideas:
</p>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.future_improvements.win32_sync"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.future_improvements.win32_sync" title="Win32 synchronization is too basic">Win32
synchronization is too basic</a>
</h4></div></div></div>
<p>
Win32 version of shared mutexes and shared conditions are based on "spin
and wait" atomic instructions. This leads to poor performance and
does not manage any issues like priority inversions. We would need very
serious help from threading experts on this. And I'm not sure that this
can be achieved in user-level software. Posix based implementations use
PTHREAD_PROCESS_SHARED attribute to place mutexes in shared memory, so
there are no such problems. I'm not aware of any implementation that simulates
PTHREAD_PROCESS_SHARED attribute for Win32. We should be able to construct
these primitives in memory mapped files, so that we can get filesystem
persistence just like with POSIX primitives.
</p>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.future_improvements.future_objectnames"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.future_improvements.future_objectnames" title="Use of wide character names on Boost.Interprocess basic resources">Use
of wide character names on Boost.Interprocess basic resources</a>
</h4></div></div></div>
<p>
Currently Interprocess only allows <span class="bold"><strong>char</strong></span>
based names for basic named objects. However, several operating systems
use <span class="bold"><strong>wchar_t</strong></span> names for resources (mapped
files, for example). In the future Interprocess should try to present a
portable narrow/wide char interface. To do this, it would be useful to
have a boost wstring <-> string conversion utilities to translate
resource names (escaping needed characters that can conflict with OS names)
in a portable way. It would be interesting also the use of <span class="bold"><strong>boost::filesystem</strong></span>
paths to avoid operating system specific issues.
</p>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.future_improvements.future_security"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.future_improvements.future_security" title="Security attributes">Security
attributes</a>
</h4></div></div></div>
<p>
<span class="bold"><strong>Boost.Interprocess</strong></span> does not define security
attributes for shared memory and synchronization objects. Standard C++
also ignores security attributes with files so adding security attributes
would require some serious work.
</p>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="interprocess.acknowledgements_notes.future_improvements.future_ipc"></a><a class="link" href="acknowledgements_notes.html#interprocess.acknowledgements_notes.future_improvements.future_ipc" title="Future inter-process communications">Future
inter-process communications</a>
</h4></div></div></div>
<p>
<span class="bold"><strong>Boost.Interprocess</strong></span> offers a process-shared
message queue based on <span class="bold"><strong>Boost.Interprocess</strong></span>
primitives like mutexes and conditions. I would want to develop more mechanisms,
like stream-oriented named fifo so that we can use it with a iostream-interface
wrapper (we can imitate Unix pipes).
</p>
<p>
C++ needs more complex mechanisms and it would be nice to have a stream
and datagram oriented PF_UNIX-like mechanism in C++. And for very fast
inter-process remote calls Solaris doors is an interesting alternative
to implement for C++. But the work to implement PF_UNIX-like sockets and
doors would be huge (and it might be difficult in a user-level library).
Any network expert volunteer?
</p>
</div>
</div>
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright © 2005-2012 Ion Gaztanaga<p>
Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
</p>
</div></td>
</tr></table>
<hr>
<div class="spirit-nav">
<a accesskey="p" href="customizing_interprocess.html"><img src="../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../interprocess.html"><img src="../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../index.html"><img src="../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="indexes_reference.html"><img src="../../../doc/src/images/next.png" alt="Next"></a>
</div>
</body>
</html>
|
