2 * threads.c: set of generic threading related routines
4 * See Copyright for the status of this software.
6 * Gary Pennington <Gary.Pennington@uk.sun.com>
15 #include <libxml/threads.h>
16 #include <libxml/globals.h>
18 #ifdef HAVE_SYS_TYPES_H
19 #include <sys/types.h>
29 #elif defined HAVE_WIN32_THREADS
31 #ifndef HAVE_COMPILER_TLS
36 #ifdef HAVE_BEOS_THREADS
45 /* #define DEBUG_THREADS */
49 static int libxml_is_threaded = -1;
52 #if (__GNUC__ == 3 && __GNUC_MINOR__ >= 3) || (__GNUC__ > 3)
53 extern int pthread_once (pthread_once_t *__once_control,
54 void (*__init_routine) (void))
56 extern void *pthread_getspecific (pthread_key_t __key)
58 extern int pthread_setspecific (pthread_key_t __key,
59 __const void *__pointer)
61 extern int pthread_key_create (pthread_key_t *__key,
62 void (*__destr_function) (void *))
64 extern int pthread_key_delete (pthread_key_t __key)
66 extern int pthread_mutex_init ()
68 extern int pthread_mutex_destroy ()
70 extern int pthread_mutex_lock ()
72 extern int pthread_mutex_unlock ()
74 extern int pthread_cond_init ()
76 extern int pthread_cond_destroy ()
78 extern int pthread_cond_wait ()
80 extern int pthread_equal ()
82 extern pthread_t pthread_self ()
84 extern int pthread_key_create ()
86 extern int pthread_key_delete ()
88 extern int pthread_cond_signal ()
93 #endif /* HAVE_PTHREAD_H */
96 * TODO: this module still uses malloc/free and not xmlMalloc/xmlFree
97 * to avoid some crazyness since xmlMalloc/xmlFree may actually
98 * be hosted on allocated blocks needing them for the allocation ...
102 * xmlMutex are a simple mutual exception locks
105 #ifdef HAVE_PTHREAD_H
106 pthread_mutex_t lock;
107 #elif defined HAVE_WIN32_THREADS
109 #elif defined HAVE_BEOS_THREADS
118 * xmlRMutex are reentrant mutual exception locks
121 #ifdef HAVE_PTHREAD_H
122 pthread_mutex_t lock;
124 unsigned int waiters;
127 #elif defined HAVE_WIN32_THREADS
130 #elif defined HAVE_BEOS_THREADS
140 * This module still has some internal static data.
141 * - xmlLibraryLock a global lock
142 * - globalkey used for per-thread data
145 #ifdef HAVE_PTHREAD_H
146 static pthread_key_t globalkey;
147 static pthread_t mainthread;
148 static pthread_once_t once_control = PTHREAD_ONCE_INIT;
149 static pthread_mutex_t global_init_lock = PTHREAD_MUTEX_INITIALIZER;
150 #elif defined HAVE_WIN32_THREADS
151 #if defined(HAVE_COMPILER_TLS)
152 static __declspec(thread) xmlGlobalState tlstate;
153 static __declspec(thread) int tlstate_inited = 0;
154 #else /* HAVE_COMPILER_TLS */
155 static DWORD globalkey = TLS_OUT_OF_INDEXES;
156 #endif /* HAVE_COMPILER_TLS */
157 static DWORD mainthread;
161 } run_once = { 0, 0};
162 static volatile LPCRITICAL_SECTION global_init_lock = NULL;
164 /* endif HAVE_WIN32_THREADS */
165 #elif defined HAVE_BEOS_THREADS
167 thread_id mainthread = 0;
168 int32 run_once_init = 0;
169 static int32 global_init_lock = -1;
170 static vint32 global_init_count = 0;
173 static xmlRMutexPtr xmlLibraryLock = NULL;
175 #ifdef LIBXML_THREAD_ENABLED
176 static void xmlOnceInit(void);
182 * xmlNewMutex() is used to allocate a libxml2 token struct for use in
183 * synchronizing access to data.
185 * Returns a new simple mutex pointer or NULL in case of error
192 if ((tok = malloc(sizeof(xmlMutex))) == NULL)
194 #ifdef HAVE_PTHREAD_H
195 if (libxml_is_threaded != 0)
196 pthread_mutex_init(&tok->lock, NULL);
197 #elif defined HAVE_WIN32_THREADS
198 tok->mutex = CreateMutex(NULL, FALSE, NULL);
199 #elif defined HAVE_BEOS_THREADS
200 if ((tok->sem = create_sem(1, "xmlMutex")) < B_OK) {
211 * @tok: the simple mutex
213 * xmlFreeMutex() is used to reclaim resources associated with a libxml2 token
217 xmlFreeMutex(xmlMutexPtr tok)
222 #ifdef HAVE_PTHREAD_H
223 if (libxml_is_threaded != 0)
224 pthread_mutex_destroy(&tok->lock);
225 #elif defined HAVE_WIN32_THREADS
226 CloseHandle(tok->mutex);
227 #elif defined HAVE_BEOS_THREADS
228 delete_sem(tok->sem);
235 * @tok: the simple mutex
237 * xmlMutexLock() is used to lock a libxml2 token.
240 xmlMutexLock(xmlMutexPtr tok)
244 #ifdef HAVE_PTHREAD_H
245 if (libxml_is_threaded != 0)
246 pthread_mutex_lock(&tok->lock);
247 #elif defined HAVE_WIN32_THREADS
248 WaitForSingleObject(tok->mutex, INFINITE);
249 #elif defined HAVE_BEOS_THREADS
250 if (acquire_sem(tok->sem) != B_NO_ERROR) {
252 xmlGenericError(xmlGenericErrorContext,
253 "xmlMutexLock():BeOS:Couldn't aquire semaphore\n");
257 tok->tid = find_thread(NULL);
264 * @tok: the simple mutex
266 * xmlMutexUnlock() is used to unlock a libxml2 token.
269 xmlMutexUnlock(xmlMutexPtr tok)
273 #ifdef HAVE_PTHREAD_H
274 if (libxml_is_threaded != 0)
275 pthread_mutex_unlock(&tok->lock);
276 #elif defined HAVE_WIN32_THREADS
277 ReleaseMutex(tok->mutex);
278 #elif defined HAVE_BEOS_THREADS
279 if (tok->tid == find_thread(NULL)) {
281 release_sem(tok->sem);
289 * xmlRNewMutex() is used to allocate a reentrant mutex for use in
290 * synchronizing access to data. token_r is a re-entrant lock and thus useful
291 * for synchronizing access to data structures that may be manipulated in a
294 * Returns the new reentrant mutex pointer or NULL in case of error
301 if ((tok = malloc(sizeof(xmlRMutex))) == NULL)
303 #ifdef HAVE_PTHREAD_H
304 if (libxml_is_threaded != 0) {
305 pthread_mutex_init(&tok->lock, NULL);
308 pthread_cond_init(&tok->cv, NULL);
310 #elif defined HAVE_WIN32_THREADS
311 InitializeCriticalSection(&tok->cs);
313 #elif defined HAVE_BEOS_THREADS
314 if ((tok->lock = xmlNewMutex()) == NULL) {
325 * @tok: the reentrant mutex
327 * xmlRFreeMutex() is used to reclaim resources associated with a
331 xmlFreeRMutex(xmlRMutexPtr tok ATTRIBUTE_UNUSED)
335 #ifdef HAVE_PTHREAD_H
336 if (libxml_is_threaded != 0) {
337 pthread_mutex_destroy(&tok->lock);
338 pthread_cond_destroy(&tok->cv);
340 #elif defined HAVE_WIN32_THREADS
341 DeleteCriticalSection(&tok->cs);
342 #elif defined HAVE_BEOS_THREADS
343 xmlFreeMutex(tok->lock);
350 * @tok: the reentrant mutex
352 * xmlRMutexLock() is used to lock a libxml2 token_r.
355 xmlRMutexLock(xmlRMutexPtr tok)
359 #ifdef HAVE_PTHREAD_H
360 if (libxml_is_threaded == 0)
363 pthread_mutex_lock(&tok->lock);
365 if (pthread_equal(tok->tid, pthread_self())) {
367 pthread_mutex_unlock(&tok->lock);
372 pthread_cond_wait(&tok->cv, &tok->lock);
376 tok->tid = pthread_self();
378 pthread_mutex_unlock(&tok->lock);
379 #elif defined HAVE_WIN32_THREADS
380 EnterCriticalSection(&tok->cs);
382 #elif defined HAVE_BEOS_THREADS
383 if (tok->lock->tid == find_thread(NULL)) {
387 xmlMutexLock(tok->lock);
395 * @tok: the reentrant mutex
397 * xmlRMutexUnlock() is used to unlock a libxml2 token_r.
400 xmlRMutexUnlock(xmlRMutexPtr tok ATTRIBUTE_UNUSED)
404 #ifdef HAVE_PTHREAD_H
405 if (libxml_is_threaded == 0)
408 pthread_mutex_lock(&tok->lock);
410 if (tok->held == 0) {
412 pthread_cond_signal(&tok->cv);
413 memset(&tok->tid, 0, sizeof(tok->tid));
415 pthread_mutex_unlock(&tok->lock);
416 #elif defined HAVE_WIN32_THREADS
418 LeaveCriticalSection(&tok->cs);
419 #elif defined HAVE_BEOS_THREADS
420 if (tok->lock->tid == find_thread(NULL)) {
422 if (tok->count == 0) {
423 xmlMutexUnlock(tok->lock);
431 * xmlGlobalInitMutexLock
433 * Makes sure that the global initialization mutex is initialized and
437 __xmlGlobalInitMutexLock(void)
439 /* Make sure the global init lock is initialized and then lock it. */
440 #ifdef HAVE_PTHREAD_H
441 /* The mutex is statically initialized, so we just lock it. */
442 if (pthread_mutex_lock)
443 pthread_mutex_lock(&global_init_lock);
444 #elif defined HAVE_WIN32_THREADS
445 LPCRITICAL_SECTION cs;
447 /* Create a new critical section */
448 if (global_init_lock == NULL) {
449 cs = malloc(sizeof(CRITICAL_SECTION));
451 xmlGenericError(xmlGenericErrorContext,
452 "xmlGlobalInitMutexLock: out of memory\n");
455 InitializeCriticalSection(cs);
457 /* Swap it into the global_init_lock */
458 #ifdef InterlockedCompareExchangePointer
459 InterlockedCompareExchangePointer(&global_init_lock, cs, NULL);
460 #else /* Use older void* version */
461 InterlockedCompareExchange((void **) &global_init_lock,
463 #endif /* InterlockedCompareExchangePointer */
465 /* If another thread successfully recorded its critical
466 * section in the global_init_lock then discard the one
467 * allocated by this thread. */
468 if (global_init_lock != cs) {
469 DeleteCriticalSection(cs);
474 /* Lock the chosen critical section */
475 EnterCriticalSection(global_init_lock);
476 #elif defined HAVE_BEOS_THREADS
479 /* Allocate a new semaphore */
480 sem = create_sem(1, "xmlGlobalinitMutex");
482 while (global_init_lock == -1) {
483 if (atomic_add(&global_init_count, 1) == 0) {
484 global_init_lock = sem;
487 atomic_add(&global_init_count, -1);
491 /* If another thread successfully recorded its critical
492 * section in the global_init_lock then discard the one
493 * allocated by this thread. */
494 if (global_init_lock != sem)
497 /* Acquire the chosen semaphore */
498 if (acquire_sem(global_init_lock) != B_NO_ERROR) {
500 xmlGenericError(xmlGenericErrorContext,
501 "xmlGlobalInitMutexLock():BeOS:Couldn't acquire semaphore\n");
509 __xmlGlobalInitMutexUnlock(void)
511 #ifdef HAVE_PTHREAD_H
512 if (pthread_mutex_unlock)
513 pthread_mutex_unlock(&global_init_lock);
514 #elif defined HAVE_WIN32_THREADS
515 if (global_init_lock != NULL) {
516 LeaveCriticalSection(global_init_lock);
518 #elif defined HAVE_BEOS_THREADS
519 release_sem(global_init_lock);
524 * xmlGlobalInitMutexDestroy
526 * Makes sure that the global initialization mutex is destroyed before
527 * application termination.
530 __xmlGlobalInitMutexDestroy(void)
532 #ifdef HAVE_PTHREAD_H
533 #elif defined HAVE_WIN32_THREADS
534 if (global_init_lock != NULL) {
535 DeleteCriticalSection(global_init_lock);
536 free(global_init_lock);
537 global_init_lock = NULL;
542 /************************************************************************
544 * Per thread global state handling *
546 ************************************************************************/
548 #ifdef LIBXML_THREAD_ENABLED
554 * xmlFreeGlobalState:
555 * @state: a thread global state
557 * xmlFreeGlobalState() is called when a thread terminates with a non-NULL
558 * global state. It is is used here to reclaim memory resources.
561 xmlFreeGlobalState(void *state)
563 xmlGlobalState *gs = (xmlGlobalState *) state;
565 /* free any memory allocated in the thread's xmlLastError */
566 xmlResetError(&(gs->xmlLastError));
573 * xmlNewGlobalState() allocates a global state. This structure is used to
574 * hold all data for use by a thread when supporting backwards compatibility
575 * of libxml2 to pre-thread-safe behaviour.
577 * Returns the newly allocated xmlGlobalStatePtr or NULL in case of error
579 static xmlGlobalStatePtr
580 xmlNewGlobalState(void)
584 gs = malloc(sizeof(xmlGlobalState));
586 xmlGenericError(xmlGenericErrorContext,
587 "xmlGetGlobalState: out of memory\n");
591 memset(gs, 0, sizeof(xmlGlobalState));
592 xmlInitializeGlobalState(gs);
595 #endif /* LIBXML_THREAD_ENABLED */
597 #ifdef HAVE_PTHREAD_H
598 #elif defined HAVE_WIN32_THREADS
599 #if !defined(HAVE_COMPILER_TLS)
600 #if defined(LIBXML_STATIC) && !defined(LIBXML_STATIC_FOR_DLL)
601 typedef struct _xmlGlobalStateCleanupHelperParams {
604 } xmlGlobalStateCleanupHelperParams;
607 xmlGlobalStateCleanupHelper(void *p)
609 xmlGlobalStateCleanupHelperParams *params =
610 (xmlGlobalStateCleanupHelperParams *) p;
611 WaitForSingleObject(params->thread, INFINITE);
612 CloseHandle(params->thread);
613 xmlFreeGlobalState(params->memory);
617 #else /* LIBXML_STATIC && !LIBXML_STATIC_FOR_DLL */
619 typedef struct _xmlGlobalStateCleanupHelperParams {
621 struct _xmlGlobalStateCleanupHelperParams *prev;
622 struct _xmlGlobalStateCleanupHelperParams *next;
623 } xmlGlobalStateCleanupHelperParams;
625 static xmlGlobalStateCleanupHelperParams *cleanup_helpers_head = NULL;
626 static CRITICAL_SECTION cleanup_helpers_cs;
628 #endif /* LIBXMLSTATIC && !LIBXML_STATIC_FOR_DLL */
629 #endif /* HAVE_COMPILER_TLS */
630 #endif /* HAVE_WIN32_THREADS */
632 #if defined HAVE_BEOS_THREADS
635 * xmlGlobalStateCleanup:
636 * @data: unused parameter
641 xmlGlobalStateCleanup(void *data)
643 void *globalval = tls_get(globalkey);
645 if (globalval != NULL)
646 xmlFreeGlobalState(globalval);
653 * xmlGetGlobalState() is called to retrieve the global state for a thread.
655 * Returns the thread global state or NULL in case of error
658 xmlGetGlobalState(void)
660 #ifdef HAVE_PTHREAD_H
661 xmlGlobalState *globalval;
663 if (libxml_is_threaded == 0)
666 pthread_once(&once_control, xmlOnceInit);
668 if ((globalval = (xmlGlobalState *)
669 pthread_getspecific(globalkey)) == NULL) {
670 xmlGlobalState *tsd = xmlNewGlobalState();
674 pthread_setspecific(globalkey, tsd);
678 #elif defined HAVE_WIN32_THREADS
679 #if defined(HAVE_COMPILER_TLS)
680 if (!tlstate_inited) {
682 xmlInitializeGlobalState(&tlstate);
685 #else /* HAVE_COMPILER_TLS */
686 xmlGlobalState *globalval;
687 xmlGlobalStateCleanupHelperParams *p;
690 #if defined(LIBXML_STATIC) && !defined(LIBXML_STATIC_FOR_DLL)
691 globalval = (xmlGlobalState *) TlsGetValue(globalkey);
693 p = (xmlGlobalStateCleanupHelperParams *) TlsGetValue(globalkey);
694 globalval = (xmlGlobalState *) (p ? p->memory : NULL);
696 if (globalval == NULL) {
697 xmlGlobalState *tsd = xmlNewGlobalState();
701 p = (xmlGlobalStateCleanupHelperParams *)
702 malloc(sizeof(xmlGlobalStateCleanupHelperParams));
704 xmlGenericError(xmlGenericErrorContext,
705 "xmlGetGlobalState: out of memory\n");
706 xmlFreeGlobalState(tsd);
710 #if defined(LIBXML_STATIC) && !defined(LIBXML_STATIC_FOR_DLL)
711 DuplicateHandle(GetCurrentProcess(), GetCurrentThread(),
712 GetCurrentProcess(), &p->thread, 0, TRUE,
713 DUPLICATE_SAME_ACCESS);
714 TlsSetValue(globalkey, tsd);
715 _beginthread(xmlGlobalStateCleanupHelper, 0, p);
717 EnterCriticalSection(&cleanup_helpers_cs);
718 if (cleanup_helpers_head != NULL) {
719 cleanup_helpers_head->prev = p;
721 p->next = cleanup_helpers_head;
723 cleanup_helpers_head = p;
724 TlsSetValue(globalkey, p);
725 LeaveCriticalSection(&cleanup_helpers_cs);
731 #endif /* HAVE_COMPILER_TLS */
732 #elif defined HAVE_BEOS_THREADS
733 xmlGlobalState *globalval;
737 if ((globalval = (xmlGlobalState *) tls_get(globalkey)) == NULL) {
738 xmlGlobalState *tsd = xmlNewGlobalState();
742 tls_set(globalkey, tsd);
743 on_exit_thread(xmlGlobalStateCleanup, NULL);
752 /************************************************************************
754 * Library wide thread interfaces *
756 ************************************************************************/
761 * xmlGetThreadId() find the current thread ID number
762 * Note that this is likely to be broken on some platforms using pthreads
763 * as the specification doesn't mandate pthread_t to be an integer type
765 * Returns the current thread ID number
770 #ifdef HAVE_PTHREAD_H
774 if (libxml_is_threaded == 0)
777 /* horrible but preserves compat, see warning above */
778 memcpy(&ret, &id, sizeof(ret));
780 #elif defined HAVE_WIN32_THREADS
781 return GetCurrentThreadId();
782 #elif defined HAVE_BEOS_THREADS
783 return find_thread(NULL);
792 * xmlIsMainThread() check whether the current thread is the main thread.
794 * Returns 1 if the current thread is the main thread, 0 otherwise
797 xmlIsMainThread(void)
799 #ifdef HAVE_PTHREAD_H
800 if (libxml_is_threaded == -1)
802 if (libxml_is_threaded == 0)
804 pthread_once(&once_control, xmlOnceInit);
805 #elif defined HAVE_WIN32_THREADS
807 #elif defined HAVE_BEOS_THREADS
812 xmlGenericError(xmlGenericErrorContext, "xmlIsMainThread()\n");
814 #ifdef HAVE_PTHREAD_H
815 return (pthread_equal(mainthread,pthread_self()));
816 #elif defined HAVE_WIN32_THREADS
817 return (mainthread == GetCurrentThreadId());
818 #elif defined HAVE_BEOS_THREADS
819 return (mainthread == find_thread(NULL));
828 * xmlLockLibrary() is used to take out a re-entrant lock on the libxml2
835 xmlGenericError(xmlGenericErrorContext, "xmlLockLibrary()\n");
837 xmlRMutexLock(xmlLibraryLock);
843 * xmlUnlockLibrary() is used to release a re-entrant lock on the libxml2
847 xmlUnlockLibrary(void)
850 xmlGenericError(xmlGenericErrorContext, "xmlUnlockLibrary()\n");
852 xmlRMutexUnlock(xmlLibraryLock);
858 * xmlInitThreads() is used to to initialize all the thread related
859 * data of the libxml2 library.
864 #ifdef HAVE_PTHREAD_H
865 if (libxml_is_threaded == -1) {
866 if ((pthread_once != NULL) &&
867 (pthread_getspecific != NULL) &&
868 (pthread_setspecific != NULL) &&
869 (pthread_key_create != NULL) &&
870 (pthread_key_delete != NULL) &&
871 (pthread_mutex_init != NULL) &&
872 (pthread_mutex_destroy != NULL) &&
873 (pthread_mutex_lock != NULL) &&
874 (pthread_mutex_unlock != NULL) &&
875 (pthread_cond_init != NULL) &&
876 (pthread_cond_destroy != NULL) &&
877 (pthread_cond_wait != NULL) &&
878 (pthread_equal != NULL) &&
879 (pthread_self != NULL) &&
880 (pthread_cond_signal != NULL)) {
881 libxml_is_threaded = 1;
883 /* fprintf(stderr, "Running multithreaded\n"); */
886 /* fprintf(stderr, "Running without multithread\n"); */
887 libxml_is_threaded = 0;
890 #elif defined(HAVE_WIN32_THREADS) && !defined(HAVE_COMPILER_TLS) && (!defined(LIBXML_STATIC) || defined(LIBXML_STATIC_FOR_DLL))
891 InitializeCriticalSection(&cleanup_helpers_cs);
898 * xmlCleanupThreads() is used to to cleanup all the thread related
899 * data of the libxml2 library once processing has ended.
901 * WARNING: if your application is multithreaded or has plugin support
902 * calling this may crash the application if another thread or
903 * a plugin is still using libxml2. It's sometimes very hard to
904 * guess if libxml2 is in use in the application, some libraries
905 * or plugins may use it without notice. In case of doubt abstain
906 * from calling this function or do it just before calling exit()
907 * to avoid leak reports from valgrind !
910 xmlCleanupThreads(void)
913 xmlGenericError(xmlGenericErrorContext, "xmlCleanupThreads()\n");
915 #ifdef HAVE_PTHREAD_H
916 if ((libxml_is_threaded) && (pthread_key_delete != NULL))
917 pthread_key_delete(globalkey);
918 #elif defined(HAVE_WIN32_THREADS) && !defined(HAVE_COMPILER_TLS) && (!defined(LIBXML_STATIC) || defined(LIBXML_STATIC_FOR_DLL))
919 if (globalkey != TLS_OUT_OF_INDEXES) {
920 xmlGlobalStateCleanupHelperParams *p;
922 EnterCriticalSection(&cleanup_helpers_cs);
923 p = cleanup_helpers_head;
925 xmlGlobalStateCleanupHelperParams *temp = p;
928 xmlFreeGlobalState(temp->memory);
931 cleanup_helpers_head = 0;
932 LeaveCriticalSection(&cleanup_helpers_cs);
934 globalkey = TLS_OUT_OF_INDEXES;
936 DeleteCriticalSection(&cleanup_helpers_cs);
940 #ifdef LIBXML_THREAD_ENABLED
945 * xmlOnceInit() is used to initialize the value of mainthread for use
946 * in other routines. This function should only be called using
947 * pthread_once() in association with the once_control variable to ensure
948 * that the function is only called once. See man pthread_once for more
954 #ifdef HAVE_PTHREAD_H
955 (void) pthread_key_create(&globalkey, xmlFreeGlobalState);
956 mainthread = pthread_self();
957 #elif defined(HAVE_WIN32_THREADS)
958 if (!run_once.done) {
959 if (InterlockedIncrement(&run_once.control) == 1) {
960 #if !defined(HAVE_COMPILER_TLS)
961 globalkey = TlsAlloc();
963 mainthread = GetCurrentThreadId();
966 /* Another thread is working; give up our slice and
967 * wait until they're done. */
968 while (!run_once.done)
972 #elif defined HAVE_BEOS_THREADS
973 if (atomic_add(&run_once_init, 1) == 0) {
974 globalkey = tls_allocate();
975 tls_set(globalkey, NULL);
976 mainthread = find_thread(NULL);
978 atomic_add(&run_once_init, -1);
985 * @hinstDLL: handle to DLL instance
986 * @fdwReason: Reason code for entry
987 * @lpvReserved: generic pointer (depends upon reason code)
989 * Entry point for Windows library. It is being used to free thread-specific
992 * Returns TRUE always
994 #ifdef HAVE_PTHREAD_H
995 #elif defined(HAVE_WIN32_THREADS) && !defined(HAVE_COMPILER_TLS) && (!defined(LIBXML_STATIC) || defined(LIBXML_STATIC_FOR_DLL))
996 #if defined(LIBXML_STATIC_FOR_DLL)
998 xmlDllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
1001 DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
1004 switch (fdwReason) {
1005 case DLL_THREAD_DETACH:
1006 if (globalkey != TLS_OUT_OF_INDEXES) {
1007 xmlGlobalState *globalval = NULL;
1008 xmlGlobalStateCleanupHelperParams *p =
1009 (xmlGlobalStateCleanupHelperParams *)
1010 TlsGetValue(globalkey);
1011 globalval = (xmlGlobalState *) (p ? p->memory : NULL);
1013 xmlFreeGlobalState(globalval);
1014 TlsSetValue(globalkey, NULL);
1017 EnterCriticalSection(&cleanup_helpers_cs);
1018 if (p == cleanup_helpers_head)
1019 cleanup_helpers_head = p->next;
1021 p->prev->next = p->next;
1022 if (p->next != NULL)
1023 p->next->prev = p->prev;
1024 LeaveCriticalSection(&cleanup_helpers_cs);
1033 #define bottom_threads
1034 #include "elfgcchack.h"