This repository has been archived by the owner on Nov 8, 2023. It is now read-only.
-
Notifications
You must be signed in to change notification settings - Fork 58
/
Copy pathglobals.c
1242 lines (1109 loc) · 31.4 KB
/
globals.c
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
/*
* globals.c: definition and handling of the set of global variables
* of the library
*
* See Copyright for the status of this software.
*
* Gary Pennington <[email protected]>
*/
#define IN_LIBXML
#include "libxml.h"
#include <stdlib.h>
#include <string.h>
#define XML_GLOBALS_NO_REDEFINITION
#include <libxml/globals.h>
#include <libxml/xmlerror.h>
#include <libxml/xmlmemory.h>
#include <libxml/xmlIO.h>
#include <libxml/parser.h>
#include <libxml/threads.h>
#include <libxml/tree.h>
#include <libxml/SAX.h>
#include <libxml/SAX2.h>
#include "private/dict.h"
#include "private/error.h"
#include "private/globals.h"
#include "private/threads.h"
#include "private/tree.h"
/*
* Mutex to protect "ForNewThreads" variables
*/
static xmlMutex xmlThrDefMutex;
/*
* Thread-local storage emulation.
*
* This works by replacing a global variable
*
* extern xmlError xmlLastError;
*
* with a macro that calls a function returning a pointer to the global in
* thread-local storage:
*
* xmlError *__xmlLastError(void);
* #define xmlError (*__xmlLastError());
*
* The code can operate in a multitude of ways depending on the environment.
* First we support POSIX and Windows threads. Then we support both
* thread-local storage provided by the compiler and older methods like
* thread-specific data (pthreads) or TlsAlloc (Windows).
*
* To clean up thread-local storage, we use thread-specific data on POSIX.
* On Windows, we either use DllMain when compiling a DLL or a registered
* wait function for static builds.
*
* Compiler TLS isn't really useful. It can make allocation more robust
* on some platforms but it also increases the memory consumption of each
* thread by ~250 bytes whether it uses libxml2 or not. The main problem
* is that be have to deallocate strings in xmlLastError and C offers no
* simple way to deallocate dynamic data in _Thread_local variables.
* In C++, one could simply use a thread_local variable with a destructor.
*/
#ifdef LIBXML_THREAD_ENABLED
/*
* On Darwin, thread-local storage destructors seem to be run before
* pthread thread-specific data destructors. This causes ASan to
* report a use-after-free.
*
* On Windows, we can't use TLS in static builds. The RegisterWait
* callback would run after TLS was deallocated.
*/
#if defined(XML_THREAD_LOCAL) && \
!defined(__APPLE__) && \
!defined(USE_WAIT_DTOR)
#define USE_TLS
#endif
#ifdef HAVE_WIN32_THREADS
#if defined(LIBXML_STATIC) && !defined(LIBXML_STATIC_FOR_DLL)
#define USE_WAIT_DTOR
#else
#define USE_DLL_MAIN
#endif
#endif
#define XML_DECLARE_MEMBER(name, type, attrs) \
type gs_##name;
struct _xmlGlobalState {
#ifdef USE_TLS
int initialized;
#endif
#ifdef USE_WAIT_DTOR
void *threadHandle;
void *waitHandle;
#endif
unsigned localRngState[2];
xmlError lastError;
#define XML_OP XML_DECLARE_MEMBER
XML_GLOBALS_ALLOC
XML_GLOBALS_PARSER
XML_GLOBALS_ERROR
XML_GLOBALS_TREE
XML_GLOBALS_IO
#undef XML_OP
};
#ifdef USE_TLS
static XML_THREAD_LOCAL xmlGlobalState globalState;
#endif
#ifdef HAVE_POSIX_THREADS
/*
* On POSIX, we need thread-specific data even with thread-local storage
* to destroy indirect references from global state (xmlLastError) at
* thread exit.
*/
static pthread_key_t globalkey;
#elif defined HAVE_WIN32_THREADS
#ifndef USE_TLS
static DWORD globalkey = TLS_OUT_OF_INDEXES;
#endif
#endif /* HAVE_WIN32_THREADS */
static void
xmlFreeGlobalState(void *state);
#endif /* LIBXML_THREAD_ENABLED */
/************************************************************************
* *
* All the user accessible global variables of the library *
* *
************************************************************************/
/*
* Memory allocation routines
*/
/**
* xmlFree:
* @mem: an already allocated block of memory
*
* The variable holding the libxml free() implementation
*/
xmlFreeFunc xmlFree = free;
/**
* xmlMalloc:
* @size: the size requested in bytes
*
* The variable holding the libxml malloc() implementation
*
* Returns a pointer to the newly allocated block or NULL in case of error
*/
xmlMallocFunc xmlMalloc = malloc;
/**
* xmlMallocAtomic:
* @size: the size requested in bytes
*
* The variable holding the libxml malloc() implementation for atomic
* data (i.e. blocks not containing pointers), useful when using a
* garbage collecting allocator.
*
* Returns a pointer to the newly allocated block or NULL in case of error
*/
xmlMallocFunc xmlMallocAtomic = malloc;
/**
* xmlRealloc:
* @mem: an already allocated block of memory
* @size: the new size requested in bytes
*
* The variable holding the libxml realloc() implementation
*
* Returns a pointer to the newly reallocated block or NULL in case of error
*/
xmlReallocFunc xmlRealloc = realloc;
/**
* xmlPosixStrdup
* @cur: the input char *
*
* a strdup implementation with a type signature matching POSIX
*
* Returns a new xmlChar * or NULL
*/
static char *
xmlPosixStrdup(const char *cur) {
return((char*) xmlCharStrdup(cur));
}
/**
* xmlMemStrdup:
* @str: a zero terminated string
*
* The variable holding the libxml strdup() implementation
*
* Returns the copy of the string or NULL in case of error
*/
xmlStrdupFunc xmlMemStrdup = xmlPosixStrdup;
/**
* xmlBufferAllocScheme:
*
* DEPRECATED: Don't use.
*
* Global setting, default allocation policy for buffers, default is
* XML_BUFFER_ALLOC_EXACT
*/
const xmlBufferAllocationScheme xmlBufferAllocScheme = XML_BUFFER_ALLOC_EXACT;
/**
* xmlDefaultBufferSize:
*
* DEPRECATED: Don't use.
*
* Global setting, default buffer size. Default value is BASE_BUFFER_SIZE
*/
const int xmlDefaultBufferSize = BASE_BUFFER_SIZE;
/*
* Parser defaults
*/
/**
* oldXMLWDcompatibility:
*
* DEPRECATED, always 0.
*/
const int oldXMLWDcompatibility = 0; /* DEPRECATED */
/**
* xmlParserDebugEntities:
*
* DEPRECATED, always 0.
*/
const int xmlParserDebugEntities = 0;
/**
* xmlDoValidityCheckingDefaultValue:
*
* DEPRECATED: Use the modern options API with XML_PARSE_DTDVALID.
*
* Global setting, indicate that the parser should work in validating mode.
* Disabled by default.
*/
#if !defined(LIBXML_THREAD_ENABLED) || defined(LIBXML_LEGACY_ENABLED)
int xmlDoValidityCheckingDefaultValue = 0;
#endif
static int xmlDoValidityCheckingDefaultValueThrDef = 0;
/**
* xmlGetWarningsDefaultValue:
*
* DEPRECATED: Use the modern options API with XML_PARSE_NOWARNING.
*
* Global setting, indicate that the DTD validation should provide warnings.
* Activated by default.
*/
#if !defined(LIBXML_THREAD_ENABLED) || defined(LIBXML_LEGACY_ENABLED)
int xmlGetWarningsDefaultValue = 1;
#endif
static int xmlGetWarningsDefaultValueThrDef = 1;
/**
* xmlLoadExtDtdDefaultValue:
*
* DEPRECATED: Use the modern options API with XML_PARSE_DTDLOAD.
*
* Global setting, indicate that the parser should load DTD while not
* validating.
* Disabled by default.
*/
#if !defined(LIBXML_THREAD_ENABLED) || defined(LIBXML_LEGACY_ENABLED)
int xmlLoadExtDtdDefaultValue = 0;
#endif
static int xmlLoadExtDtdDefaultValueThrDef = 0;
/**
* xmlPedanticParserDefaultValue:
*
* DEPRECATED: Use the modern options API with XML_PARSE_PEDANTIC.
*
* Global setting, indicate that the parser be pedantic
* Disabled by default.
*/
#if !defined(LIBXML_THREAD_ENABLED) || defined(LIBXML_LEGACY_ENABLED)
int xmlPedanticParserDefaultValue = 0;
#endif
static int xmlPedanticParserDefaultValueThrDef = 0;
/**
* xmlLineNumbersDefaultValue:
*
* DEPRECATED: The modern options API always enables line numbers.
*
* Global setting, indicate that the parser should store the line number
* in the content field of elements in the DOM tree.
* Disabled by default since this may not be safe for old classes of
* application.
*/
#if !defined(LIBXML_THREAD_ENABLED) || defined(LIBXML_LEGACY_ENABLED)
int xmlLineNumbersDefaultValue = 0;
#endif
static int xmlLineNumbersDefaultValueThrDef = 0;
/**
* xmlKeepBlanksDefaultValue:
*
* DEPRECATED: Use the modern options API with XML_PARSE_NOBLANKS.
*
* Global setting, indicate that the parser should keep all blanks
* nodes found in the content
* Activated by default, this is actually needed to have the parser
* conformant to the XML Recommendation, however the option is kept
* for some applications since this was libxml1 default behaviour.
*/
#if !defined(LIBXML_THREAD_ENABLED) || defined(LIBXML_LEGACY_ENABLED)
int xmlKeepBlanksDefaultValue = 1;
#endif
static int xmlKeepBlanksDefaultValueThrDef = 1;
/**
* xmlSubstituteEntitiesDefaultValue:
*
* DEPRECATED: Use the modern options API with XML_PARSE_NOENT.
*
* Global setting, indicate that the parser should not generate entity
* references but replace them with the actual content of the entity
* Disabled by default, this should be activated when using XPath since
* the XPath data model requires entities replacement and the XPath
* engine does not handle entities references transparently.
*/
#if !defined(LIBXML_THREAD_ENABLED) || defined(LIBXML_LEGACY_ENABLED)
int xmlSubstituteEntitiesDefaultValue = 0;
#endif
static int xmlSubstituteEntitiesDefaultValueThrDef = 0;
/**
* xmlRegisterNodeDefaultValue:
*
* DEPRECATED: Don't use
*/
#if !defined(LIBXML_THREAD_ENABLED) || defined(LIBXML_LEGACY_ENABLED)
xmlRegisterNodeFunc xmlRegisterNodeDefaultValue = NULL;
#endif
static xmlRegisterNodeFunc xmlRegisterNodeDefaultValueThrDef = NULL;
/**
* xmlDeregisterNodeDefaultValue:
*
* DEPRECATED: Don't use
*/
#if !defined(LIBXML_THREAD_ENABLED) || defined(LIBXML_LEGACY_ENABLED)
xmlDeregisterNodeFunc xmlDeregisterNodeDefaultValue = NULL;
#endif
static xmlDeregisterNodeFunc xmlDeregisterNodeDefaultValueThrDef = NULL;
/**
* xmlParserInputBufferCreateFilenameValue:
*
* DEPRECATED: Don't use
*/
#if !defined(LIBXML_THREAD_ENABLED) || defined(LIBXML_LEGACY_ENABLED)
xmlParserInputBufferCreateFilenameFunc
xmlParserInputBufferCreateFilenameValue = NULL;
#endif
static xmlParserInputBufferCreateFilenameFunc
xmlParserInputBufferCreateFilenameValueThrDef = NULL;
/**
* xmlOutputBufferCreateFilenameValue:
*
* DEPRECATED: Don't use
*/
#if !defined(LIBXML_THREAD_ENABLED) || defined(LIBXML_LEGACY_ENABLED)
xmlOutputBufferCreateFilenameFunc xmlOutputBufferCreateFilenameValue = NULL;
#endif
static xmlOutputBufferCreateFilenameFunc
xmlOutputBufferCreateFilenameValueThrDef = NULL;
/**
* xmlGenericError:
*
* DEPRECATED: Use xmlCtxtSetErrorHandler.
*
* Global setting: function used for generic error callbacks
*/
#if !defined(LIBXML_THREAD_ENABLED) || defined(LIBXML_LEGACY_ENABLED)
xmlGenericErrorFunc xmlGenericError = xmlGenericErrorDefaultFunc;
#endif
static xmlGenericErrorFunc xmlGenericErrorThrDef = xmlGenericErrorDefaultFunc;
/**
* xmlStructuredError:
*
* DEPRECATED: Use xmlCtxtSetErrorHandler.
*
* Global setting: function used for structured error callbacks
*/
#if !defined(LIBXML_THREAD_ENABLED) || defined(LIBXML_LEGACY_ENABLED)
xmlStructuredErrorFunc xmlStructuredError = NULL;
#endif
static xmlStructuredErrorFunc xmlStructuredErrorThrDef = NULL;
/**
* xmlGenericErrorContext:
*
* DEPRECATED: Use xmlCtxtSetErrorHandler.
*
* Global setting passed to generic error callbacks
*/
#if !defined(LIBXML_THREAD_ENABLED) || defined(LIBXML_LEGACY_ENABLED)
void *xmlGenericErrorContext = NULL;
#endif
static void *xmlGenericErrorContextThrDef = NULL;
/**
* xmlStructuredErrorContext:
*
* DEPRECATED: Use xmlCtxtSetErrorHandler.
*
* Global setting passed to structured error callbacks
*/
#if !defined(LIBXML_THREAD_ENABLED) || defined(LIBXML_LEGACY_ENABLED)
void *xmlStructuredErrorContext = NULL;
#endif
static void *xmlStructuredErrorContextThrDef = NULL;
#if !defined(LIBXML_THREAD_ENABLED) || defined(LIBXML_LEGACY_ENABLED)
xmlError xmlLastError;
#endif
#ifdef LIBXML_OUTPUT_ENABLED
/*
* output defaults
*/
/**
* xmlIndentTreeOutput:
*
* DEPRECATED: Use XML_SAVE_INDENT and XML_SAVE_NO_INDENT.
*
* Global setting, asking the serializer to indent the output tree by default
* Enabled by default
*/
#if !defined(LIBXML_THREAD_ENABLED) || defined(LIBXML_LEGACY_ENABLED)
int xmlIndentTreeOutput = 1;
#endif
static int xmlIndentTreeOutputThrDef = 1;
/**
* xmlTreeIndentString:
*
* DEPRECATED: Use xmlSaveSetIndentString.
*
* The string used to do one-level indent. By default is equal to
* " " (two spaces)
*/
#if !defined(LIBXML_THREAD_ENABLED) || defined(LIBXML_LEGACY_ENABLED)
const char *xmlTreeIndentString = " ";
#endif
static const char *xmlTreeIndentStringThrDef = " ";
/**
* xmlSaveNoEmptyTags:
*
* DEPRECATED: Use XML_SAVE_EMPTY and XML_SAVE_NO_EMPTY.
*
* Global setting, asking the serializer to not output empty tags
* as <empty/> but <empty></empty>. those two forms are indistinguishable
* once parsed.
* Disabled by default
*/
#if !defined(LIBXML_THREAD_ENABLED) || defined(LIBXML_LEGACY_ENABLED)
int xmlSaveNoEmptyTags = 0;
#endif
static int xmlSaveNoEmptyTagsThrDef = 0;
#endif /* LIBXML_OUTPUT_ENABLED */
#ifdef LIBXML_SAX1_ENABLED
/**
* xmlDefaultSAXHandler:
*
* DEPRECATED: This handler is unused and will be removed from future
* versions.
*
* Default SAX version1 handler for XML, builds the DOM tree
*/
const xmlSAXHandlerV1 xmlDefaultSAXHandler = {
xmlSAX2InternalSubset,
xmlSAX2IsStandalone,
xmlSAX2HasInternalSubset,
xmlSAX2HasExternalSubset,
xmlSAX2ResolveEntity,
xmlSAX2GetEntity,
xmlSAX2EntityDecl,
xmlSAX2NotationDecl,
xmlSAX2AttributeDecl,
xmlSAX2ElementDecl,
xmlSAX2UnparsedEntityDecl,
xmlSAX2SetDocumentLocator,
xmlSAX2StartDocument,
xmlSAX2EndDocument,
xmlSAX2StartElement,
xmlSAX2EndElement,
xmlSAX2Reference,
xmlSAX2Characters,
xmlSAX2Characters,
xmlSAX2ProcessingInstruction,
xmlSAX2Comment,
xmlParserWarning,
xmlParserError,
xmlParserError,
xmlSAX2GetParameterEntity,
xmlSAX2CDataBlock,
xmlSAX2ExternalSubset,
1,
};
#endif /* LIBXML_SAX1_ENABLED */
/**
* xmlDefaultSAXLocator:
*
* DEPRECATED: Don't use
*
* The default SAX Locator
* { getPublicId, getSystemId, getLineNumber, getColumnNumber}
*/
const xmlSAXLocator xmlDefaultSAXLocator = {
xmlSAX2GetPublicId,
xmlSAX2GetSystemId,
xmlSAX2GetLineNumber,
xmlSAX2GetColumnNumber
};
#if defined(LIBXML_HTML_ENABLED) && defined(LIBXML_SAX1_ENABLED)
/**
* htmlDefaultSAXHandler:
*
* DEPRECATED: This handler is unused and will be removed from future
* versions.
*
* Default old SAX v1 handler for HTML, builds the DOM tree
*/
const xmlSAXHandlerV1 htmlDefaultSAXHandler = {
xmlSAX2InternalSubset,
NULL,
NULL,
NULL,
NULL,
xmlSAX2GetEntity,
NULL,
NULL,
NULL,
NULL,
NULL,
xmlSAX2SetDocumentLocator,
xmlSAX2StartDocument,
xmlSAX2EndDocument,
xmlSAX2StartElement,
xmlSAX2EndElement,
NULL,
xmlSAX2Characters,
xmlSAX2IgnorableWhitespace,
xmlSAX2ProcessingInstruction,
xmlSAX2Comment,
xmlParserWarning,
xmlParserError,
xmlParserError,
NULL,
xmlSAX2CDataBlock,
NULL,
1,
};
#endif /* LIBXML_HTML_ENABLED */
/************************************************************************
* *
* Per thread global state handling *
* *
************************************************************************/
/**
* xmlInitGlobals:
*
* DEPRECATED: Alias for xmlInitParser.
*/
void xmlInitGlobals(void) {
xmlInitParser();
}
/**
* xmlInitGlobalsInternal:
*
* Additional initialisation for multi-threading
*/
void xmlInitGlobalsInternal(void) {
xmlInitMutex(&xmlThrDefMutex);
#ifdef HAVE_POSIX_THREADS
pthread_key_create(&globalkey, xmlFreeGlobalState);
#elif defined(HAVE_WIN32_THREADS)
#ifndef USE_TLS
if (globalkey == TLS_OUT_OF_INDEXES)
globalkey = TlsAlloc();
#endif
#endif
}
/**
* xmlCleanupGlobals:
*
* DEPRECATED: This function is a no-op. Call xmlCleanupParser
* to free global state but see the warnings there. xmlCleanupParser
* should be only called once at program exit. In most cases, you don't
* have call cleanup functions at all.
*/
void xmlCleanupGlobals(void) {
}
/**
* xmlCleanupGlobalsInternal:
*
* Additional cleanup for multi-threading
*/
void xmlCleanupGlobalsInternal(void) {
/*
* We assume that all other threads using the library have
* terminated and the last remaining thread calls
* xmlCleanupParser.
*/
#ifdef HAVE_POSIX_THREADS
/*
* Free thread-specific data of last thread before calling
* pthread_key_delete.
*/
xmlGlobalState *gs = pthread_getspecific(globalkey);
if (gs != NULL)
xmlFreeGlobalState(gs);
pthread_key_delete(globalkey);
#elif defined(HAVE_WIN32_THREADS)
#if defined(USE_WAIT_DTOR) && !defined(USE_TLS)
if (globalkey != TLS_OUT_OF_INDEXES) {
TlsFree(globalkey);
globalkey = TLS_OUT_OF_INDEXES;
}
#endif
#else /* no thread support */
xmlResetError(&xmlLastError);
#endif
xmlCleanupMutex(&xmlThrDefMutex);
}
/**
* xmlInitializeGlobalState:
* @gs: a pointer to a newly allocated global state
*
* DEPRECATED: No-op.
*/
void
xmlInitializeGlobalState(xmlGlobalStatePtr gs ATTRIBUTE_UNUSED)
{
}
/**
* xmlGetGlobalState:
*
* DEPRECATED
*
* Returns NULL.
*/
xmlGlobalStatePtr
xmlGetGlobalState(void)
{
return(NULL);
}
/**
* xmlIsMainThread:
*
* DEPRECATED: Internal function, do not use.
*
* Check whether the current thread is the main thread.
*
* Returns 1 if the current thread is the main thread, 0 otherwise
*/
int
xmlIsMainThread(void) {
return(0);
}
#ifdef LIBXML_THREAD_ENABLED
static void
xmlFreeGlobalState(void *state)
{
xmlGlobalState *gs = (xmlGlobalState *) state;
/*
* Free any memory allocated in the thread's xmlLastError. If it
* weren't for this indirect allocation, we wouldn't need
* a destructor with thread-local storage at all!
*
* It would be nice if we could make xmlLastError a special error
* type which uses statically allocated, fixed-size buffers.
* But the xmlError struct is fully public and widely used,
* so changes are dangerous.
*/
xmlResetError(&gs->lastError);
#ifndef USE_TLS
free(state);
#endif
}
#if defined(USE_WAIT_DTOR)
static void WINAPI
xmlGlobalStateDtor(void *ctxt, unsigned char timedOut ATTRIBUTE_UNUSED) {
xmlGlobalStatePtr gs = ctxt;
UnregisterWait(gs->waitHandle);
CloseHandle(gs->threadHandle);
xmlFreeGlobalState(gs);
}
static int
xmlRegisterGlobalStateDtor(xmlGlobalState *gs) {
void *processHandle = GetCurrentProcess();
void *threadHandle;
void *waitHandle;
if (DuplicateHandle(processHandle, GetCurrentThread(), processHandle,
&threadHandle, 0, FALSE, DUPLICATE_SAME_ACCESS) == 0) {
return(-1);
}
if (RegisterWaitForSingleObject(&waitHandle, threadHandle,
xmlGlobalStateDtor, gs, INFINITE, WT_EXECUTEONLYONCE) == 0) {
CloseHandle(threadHandle);
return(-1);
}
gs->threadHandle = threadHandle;
gs->waitHandle = waitHandle;
return(0);
}
#endif /* USE_WAIT_DTOR */
static void
xmlInitGlobalState(xmlGlobalStatePtr gs) {
gs->localRngState[0] = xmlGlobalRandom();
gs->localRngState[1] = xmlGlobalRandom();
memset(&gs->lastError, 0, sizeof(xmlError));
#ifdef LIBXML_THREAD_ALLOC_ENABLED
/* XML_GLOBALS_ALLOC */
gs->gs_xmlFree = free;
gs->gs_xmlMalloc = malloc;
gs->gs_xmlMallocAtomic = malloc;
gs->gs_xmlRealloc = realloc;
gs->gs_xmlMemStrdup = xmlPosixStrdup;
#endif
xmlMutexLock(&xmlThrDefMutex);
/* XML_GLOBALS_PARSER */
gs->gs_xmlDoValidityCheckingDefaultValue =
xmlDoValidityCheckingDefaultValueThrDef;
gs->gs_xmlGetWarningsDefaultValue = xmlGetWarningsDefaultValueThrDef;
gs->gs_xmlKeepBlanksDefaultValue = xmlKeepBlanksDefaultValueThrDef;
gs->gs_xmlLineNumbersDefaultValue = xmlLineNumbersDefaultValueThrDef;
gs->gs_xmlLoadExtDtdDefaultValue = xmlLoadExtDtdDefaultValueThrDef;
gs->gs_xmlPedanticParserDefaultValue = xmlPedanticParserDefaultValueThrDef;
gs->gs_xmlSubstituteEntitiesDefaultValue =
xmlSubstituteEntitiesDefaultValueThrDef;
#ifdef LIBXML_OUTPUT_ENABLED
gs->gs_xmlIndentTreeOutput = xmlIndentTreeOutputThrDef;
gs->gs_xmlTreeIndentString = xmlTreeIndentStringThrDef;
gs->gs_xmlSaveNoEmptyTags = xmlSaveNoEmptyTagsThrDef;
#endif
/* XML_GLOBALS_ERROR */
gs->gs_xmlGenericError = xmlGenericErrorThrDef;
gs->gs_xmlStructuredError = xmlStructuredErrorThrDef;
gs->gs_xmlGenericErrorContext = xmlGenericErrorContextThrDef;
gs->gs_xmlStructuredErrorContext = xmlStructuredErrorContextThrDef;
/* XML_GLOBALS_TREE */
gs->gs_xmlRegisterNodeDefaultValue = xmlRegisterNodeDefaultValueThrDef;
gs->gs_xmlDeregisterNodeDefaultValue = xmlDeregisterNodeDefaultValueThrDef;
/* XML_GLOBALS_IO */
gs->gs_xmlParserInputBufferCreateFilenameValue =
xmlParserInputBufferCreateFilenameValueThrDef;
gs->gs_xmlOutputBufferCreateFilenameValue =
xmlOutputBufferCreateFilenameValueThrDef;
xmlMutexUnlock(&xmlThrDefMutex);
#ifdef USE_TLS
gs->initialized = 1;
#endif
#ifdef HAVE_POSIX_THREADS
pthread_setspecific(globalkey, gs);
#elif defined HAVE_WIN32_THREADS
#ifndef USE_TLS
TlsSetValue(globalkey, gs);
#endif
#ifdef USE_WAIT_DTOR
xmlRegisterGlobalStateDtor(gs);
#endif
#endif
}
#ifndef USE_TLS
/**
* xmlNewGlobalState:
*
* xmlNewGlobalState() allocates a global state. This structure is used to
* hold all data for use by a thread when supporting backwards compatibility
* of libxml2 to pre-thread-safe behaviour.
*
* Returns the newly allocated xmlGlobalStatePtr or NULL in case of error
*/
static xmlGlobalStatePtr
xmlNewGlobalState(int allowFailure)
{
xmlGlobalState *gs;
/*
* We use malloc/free to allow accessing globals before setting
* custom memory allocators.
*/
gs = malloc(sizeof(xmlGlobalState));
if (gs == NULL) {
if (allowFailure)
return(NULL);
/*
* If an application didn't call xmlCheckThreadLocalStorage to make
* sure that global state could be allocated, it's too late to
* handle the error.
*/
xmlAbort("libxml2: Failed to allocate globals for thread\n"
"libxml2: See xmlCheckThreadLocalStorage\n");
}
memset(gs, 0, sizeof(xmlGlobalState));
xmlInitGlobalState(gs);
return (gs);
}
#endif
static xmlGlobalStatePtr
xmlGetThreadLocalStorage(int allowFailure) {
xmlGlobalState *gs;
(void) allowFailure;
xmlInitParser();
#ifdef USE_TLS
gs = &globalState;
if (gs->initialized == 0)
xmlInitGlobalState(gs);
#elif defined(HAVE_POSIX_THREADS)
gs = (xmlGlobalState *) pthread_getspecific(globalkey);
if (gs == NULL)
gs = xmlNewGlobalState(allowFailure);
#elif defined(HAVE_WIN32_THREADS)
gs = (xmlGlobalState *) TlsGetValue(globalkey);
if (gs == NULL)
gs = xmlNewGlobalState(allowFailure);
#else
gs = NULL;
#endif
return(gs);
}
/* Define thread-local storage accessors with macro magic */
#define XML_DEFINE_GLOBAL_WRAPPER(name, type, attrs) \
type *__##name(void) { \
return (&xmlGetThreadLocalStorage(0)->gs_##name); \
}
#define XML_OP XML_DEFINE_GLOBAL_WRAPPER
XML_GLOBALS_ALLOC
XML_GLOBALS_PARSER
XML_GLOBALS_ERROR
XML_GLOBALS_TREE
XML_GLOBALS_IO
#undef XML_OP
const xmlError *
__xmlLastError(void) {
return(&xmlGetThreadLocalStorage(0)->lastError);
}
/**
* xmlGetLocalRngState:
*
* Returns the local RNG state.
*/
unsigned *
xmlGetLocalRngState(void) {
return(xmlGetThreadLocalStorage(0)->localRngState);
}
/* For backward compatibility */
const char *const *
__xmlParserVersion(void) {
return &xmlParserVersion;
}
const int *
__oldXMLWDcompatibility(void) {
return &oldXMLWDcompatibility;
}
const int *
__xmlParserDebugEntities(void) {
return &xmlParserDebugEntities;
}
const xmlSAXLocator *
__xmlDefaultSAXLocator(void) {
return &xmlDefaultSAXLocator;
}
#ifdef LIBXML_SAX1_ENABLED
const xmlSAXHandlerV1 *
__xmlDefaultSAXHandler(void) {
return &xmlDefaultSAXHandler;
}
#ifdef LIBXML_HTML_ENABLED
const xmlSAXHandlerV1 *
__htmlDefaultSAXHandler(void) {
return &htmlDefaultSAXHandler;
}
#endif /* LIBXML_HTML_ENABLED */
#endif /* LIBXML_SAX1_ENABLED */
#endif /* LIBXML_THREAD_ENABLED */
/**
* xmlCheckThreadLocalStorage:
*
* Check whether thread-local storage could be allocated.
*
* In cross-platform code running in multithreaded environments, this
* function should be called once in each thread before calling other
* library functions to make sure that thread-local storage was
* allocated properly.
*
* Returns 0 on success or -1 if a memory allocation failed. A failed
* allocation signals a typically fatal and irrecoverable out-of-memory
* situation. Don't call any library functions in this case.
*
* Available since 2.12.0.
*/
int
xmlCheckThreadLocalStorage(void) {
#if defined(LIBXML_THREAD_ENABLED) && !defined(USE_TLS)
if (xmlGetThreadLocalStorage(1) == NULL)
return(-1);
#endif
return(0);
}
xmlError *
xmlGetLastErrorInternal(void) {
#ifdef LIBXML_THREAD_ENABLED
return(&xmlGetThreadLocalStorage(0)->lastError);
#else
return(&xmlLastError);
#endif
}
/** DOC_DISABLE */
/**
* DllMain:
* @hinstDLL: handle to DLL instance
* @fdwReason: Reason code for entry
* @lpvReserved: generic pointer (depends upon reason code)
*
* Entry point for Windows library. It is being used to free thread-specific
* storage.
*
* Returns TRUE always
*/
#ifdef USE_DLL_MAIN
#if defined(LIBXML_STATIC_FOR_DLL)
int