globals.c

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/*
 * globals.c: definition and handling of the set of global variables
 *            of the library
 *
 * See Copyright for the status of this software.
 *
 * Gary Pennington <Gary.Pennington@uk.sun.com>
 * daniel@veillard.com
 */
 
#define IN_LIBXML
#include "libxml.h"
 
#include <stdio.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/HTMLparser.h>
#include <libxml/parser.h>
#include <libxml/threads.h>
#include <libxml/tree.h>
#include <libxml/SAX.h>
#include <libxml/SAX2.h>
 
#include "private/error.h"
#include "private/globals.h"
#include "private/threads.h"
#include "private/tree.h"
 
/*
 * 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.
 */
 
/*
 * Helpful Macro
 */
#ifdef LIBXML_THREAD_ENABLED
#define IS_MAIN_THREAD (xmlIsMainThreadInternal())
#else
#define IS_MAIN_THREAD 1
#endif
 
#define XML_DECLARE_MEMBER(name, type, attrs) \
  type gs_##name;
 
struct _xmlGlobalState {
    int initialized;
 
#if defined(HAVE_WIN32_THREADS) && \
    defined(LIBXML_STATIC) && !defined(LIBXML_STATIC_FOR_DLL)
    void *threadHandle;
    void *waitHandle;
#endif
 
#define XML_OP XML_DECLARE_MEMBER
XML_GLOBALS_ALLOC
XML_GLOBALS_ERROR
XML_GLOBALS_HTML
XML_GLOBALS_IO
XML_GLOBALS_PARSER
XML_GLOBALS_TREE
#undef XML_OP
};
 
static int parserInitialized;
 
/*
 * Mutex to protect "ForNewThreads" variables
 */
static xmlMutex xmlThrDefMutex;
 
#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(HAVE_WIN32_THREADS) || \
     !defined(LIBXML_STATIC) || defined(LIBXML_STATIC_FOR_DLL))
#define USE_TLS
#endif
 
#ifdef USE_TLS
static XML_THREAD_LOCAL xmlGlobalState globalState;
#endif
 
#ifdef HAVE_POSIX_THREADS
 
/*
 * Weak symbol hack, see threads.c
 */
#if defined(__GNUC__) && \
    defined(__GLIBC__) && \
    __GLIBC__ * 100 + __GLIBC_MINOR__ < 234
 
#pragma weak pthread_getspecific
#pragma weak pthread_setspecific
#pragma weak pthread_key_create
#pragma weak pthread_key_delete
#pragma weak pthread_equal
#pragma weak pthread_self
 
#define XML_PTHREAD_WEAK
 
static int libxml_is_threaded = -1;
 
#endif
 
/*
 * 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;
static pthread_t mainthread;
 
#elif defined HAVE_WIN32_THREADS
 
#ifndef USE_TLS
static DWORD globalkey = TLS_OUT_OF_INDEXES;
#endif
static DWORD mainthread;
 
#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
 */
 
#if defined(DEBUG_MEMORY_LOCATION)
xmlFreeFunc xmlFree = (xmlFreeFunc) xmlMemFree;
xmlMallocFunc xmlMalloc = (xmlMallocFunc) xmlMemMalloc;
xmlMallocFunc xmlMallocAtomic = (xmlMallocFunc) xmlMemMalloc;
xmlReallocFunc xmlRealloc = (xmlReallocFunc) xmlMemRealloc;
xmlStrdupFunc xmlMemStrdup = (xmlStrdupFunc) xmlMemoryStrdup;
#else
xmlFreeFunc xmlFree = free;
xmlMallocFunc xmlMalloc = malloc;
xmlMallocFunc xmlMallocAtomic = malloc;
xmlReallocFunc xmlRealloc = realloc;
static char *
xmlPosixStrdup(const char *cur) {
    return((char*) xmlCharStrdup(cur));
}
xmlStrdupFunc xmlMemStrdup = xmlPosixStrdup;
#endif /* DEBUG_MEMORY_LOCATION */
 
xmlBufferAllocationScheme xmlBufferAllocScheme = XML_BUFFER_ALLOC_EXACT;
static xmlBufferAllocationScheme xmlBufferAllocSchemeThrDef = XML_BUFFER_ALLOC_EXACT;
int xmlDefaultBufferSize = BASE_BUFFER_SIZE;
static int xmlDefaultBufferSizeThrDef = BASE_BUFFER_SIZE;
 
/*
 * Parser defaults
 */
 
int oldXMLWDcompatibility = 0; /* DEPRECATED */
int xmlParserDebugEntities = 0;
static int xmlParserDebugEntitiesThrDef = 0;
int xmlDoValidityCheckingDefaultValue = 0;
static int xmlDoValidityCheckingDefaultValueThrDef = 0;
int xmlGetWarningsDefaultValue = 1;
static int xmlGetWarningsDefaultValueThrDef = 1;
int xmlLoadExtDtdDefaultValue = 0;
static int xmlLoadExtDtdDefaultValueThrDef = 0;
int xmlPedanticParserDefaultValue = 0;
static int xmlPedanticParserDefaultValueThrDef = 0;
int xmlLineNumbersDefaultValue = 0;
static int xmlLineNumbersDefaultValueThrDef = 0;
int xmlKeepBlanksDefaultValue = 1;
static int xmlKeepBlanksDefaultValueThrDef = 1;
int xmlSubstituteEntitiesDefaultValue = 0;
static int xmlSubstituteEntitiesDefaultValueThrDef = 0;
 
xmlRegisterNodeFunc xmlRegisterNodeDefaultValue = NULL;
static xmlRegisterNodeFunc xmlRegisterNodeDefaultValueThrDef = NULL;
 
xmlDeregisterNodeFunc xmlDeregisterNodeDefaultValue = NULL;
static xmlDeregisterNodeFunc xmlDeregisterNodeDefaultValueThrDef = NULL;
 
xmlParserInputBufferCreateFilenameFunc xmlParserInputBufferCreateFilenameValue = NULL;
static xmlParserInputBufferCreateFilenameFunc xmlParserInputBufferCreateFilenameValueThrDef = NULL;
 
xmlOutputBufferCreateFilenameFunc xmlOutputBufferCreateFilenameValue = NULL;
static xmlOutputBufferCreateFilenameFunc xmlOutputBufferCreateFilenameValueThrDef = NULL;
 
xmlGenericErrorFunc xmlGenericError = xmlGenericErrorDefaultFunc;
static xmlGenericErrorFunc xmlGenericErrorThrDef = xmlGenericErrorDefaultFunc;
xmlStructuredErrorFunc xmlStructuredError = NULL;
static xmlStructuredErrorFunc xmlStructuredErrorThrDef = NULL;
void *xmlGenericErrorContext = NULL;
static void *xmlGenericErrorContextThrDef = NULL;
void *xmlStructuredErrorContext = NULL;
static void *xmlStructuredErrorContextThrDef = NULL;
xmlError xmlLastError;
 
#ifdef LIBXML_OUTPUT_ENABLED
/*
 * output defaults
 */
int xmlIndentTreeOutput = 1;
static int xmlIndentTreeOutputThrDef = 1;
 
const char *xmlTreeIndentString = "  ";
static const char *xmlTreeIndentStringThrDef = "  ";
 
int xmlSaveNoEmptyTags = 0;
static int xmlSaveNoEmptyTagsThrDef = 0;
#endif /* LIBXML_OUTPUT_ENABLED */
 
#ifdef LIBXML_SAX1_ENABLED
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 */
 
xmlSAXLocator xmlDefaultSAXLocator = {
    xmlSAX2GetPublicId,
    xmlSAX2GetSystemId,
    xmlSAX2GetLineNumber,
    xmlSAX2GetColumnNumber
};
 
#if defined(LIBXML_HTML_ENABLED) && defined(LIBXML_SAX1_ENABLED)
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        *
 *                                  *
 ************************************************************************/
 
void xmlInitGlobals(void) {
    xmlInitParser();
}
 
void xmlInitGlobalsInternal(void) {
    xmlInitMutex(&xmlThrDefMutex);
 
#ifdef HAVE_POSIX_THREADS
#ifdef XML_PTHREAD_WEAK
    if (libxml_is_threaded == -1)
        libxml_is_threaded =
            (pthread_getspecific != NULL) &&
            (pthread_setspecific != NULL) &&
            (pthread_key_create != NULL) &&
            (pthread_key_delete != NULL) &&
            /*
             * pthread_equal can be inline, resuting in -Waddress warnings.
             * Let's assume it's available if all the other functions are.
             */
            /* (pthread_equal != NULL) && */
            (pthread_self != NULL);
    if (libxml_is_threaded == 0)
        return;
#endif /* XML_PTHREAD_WEAK */
    pthread_key_create(&globalkey, xmlFreeGlobalState);
    mainthread = pthread_self();
#elif defined(HAVE_WIN32_THREADS)
#ifndef USE_TLS
    globalkey = TlsAlloc();
#endif
    mainthread = GetCurrentThreadId();
#endif
}
 
void xmlCleanupGlobals(void) {
}
 
void xmlCleanupGlobalsInternal(void) {
    xmlResetError(&xmlLastError);
 
    xmlCleanupMutex(&xmlThrDefMutex);
 
#ifdef HAVE_POSIX_THREADS
#ifdef XML_PTHREAD_WEAK
    if (libxml_is_threaded == 0)
        return;
#endif /* XML_PTHREAD_WEAK */
    pthread_key_delete(globalkey);
#elif defined(HAVE_WIN32_THREADS)
#ifndef USE_TLS
    if (globalkey != TLS_OUT_OF_INDEXES) {
        TlsFree(globalkey);
        globalkey = TLS_OUT_OF_INDEXES;
    }
#endif
#endif
 
    parserInitialized = 0;
}
 
void
xmlInitializeGlobalState(xmlGlobalStatePtr gs ATTRIBUTE_UNUSED)
{
}
 
xmlGlobalStatePtr
xmlGetGlobalState(void)
{
    return(NULL);
}
 
static int
xmlIsMainThreadInternal(void) {
    if (parserInitialized == 0) {
        xmlInitParser();
        parserInitialized = 1;
    }
 
#ifdef HAVE_POSIX_THREADS
#ifdef XML_PTHREAD_WEAK
    if (libxml_is_threaded == 0)
        return (1);
#endif
    return (pthread_equal(mainthread, pthread_self()));
#elif defined HAVE_WIN32_THREADS
    return (mainthread == GetCurrentThreadId());
#else
    return (1);
#endif
}
 
int
xmlIsMainThread(void) {
    return(xmlIsMainThreadInternal());
}
 
#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->gs_xmlLastError));
#ifndef USE_TLS
    free(state);
#endif
}
 
#if defined(HAVE_WIN32_THREADS) && \
    defined(LIBXML_STATIC) && !defined(LIBXML_STATIC_FOR_DLL)
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 /* LIBXML_STATIC */
 
static void
xmlInitGlobalState(xmlGlobalStatePtr gs) {
    xmlMutexLock(&xmlThrDefMutex);
 
#if defined(LIBXML_HTML_ENABLED) && defined(LIBXML_LEGACY_ENABLED) && defined(LIBXML_SAX1_ENABLED)
    inithtmlDefaultSAXHandler(&gs->gs_htmlDefaultSAXHandler);
#endif
 
    gs->gs_oldXMLWDcompatibility = 0;
    gs->gs_xmlBufferAllocScheme = xmlBufferAllocSchemeThrDef;
    gs->gs_xmlDefaultBufferSize = xmlDefaultBufferSizeThrDef;
#if defined(LIBXML_SAX1_ENABLED) && defined(LIBXML_LEGACY_ENABLED)
    initxmlDefaultSAXHandler(&gs->gs_xmlDefaultSAXHandler, 1);
#endif /* LIBXML_SAX1_ENABLED */
    gs->gs_xmlDefaultSAXLocator.getPublicId = xmlSAX2GetPublicId;
    gs->gs_xmlDefaultSAXLocator.getSystemId = xmlSAX2GetSystemId;
    gs->gs_xmlDefaultSAXLocator.getLineNumber = xmlSAX2GetLineNumber;
    gs->gs_xmlDefaultSAXLocator.getColumnNumber = xmlSAX2GetColumnNumber;
    gs->gs_xmlDoValidityCheckingDefaultValue =
         xmlDoValidityCheckingDefaultValueThrDef;
#ifdef LIBXML_THREAD_ALLOC_ENABLED
#ifdef DEBUG_MEMORY_LOCATION
    gs->gs_xmlFree = xmlMemFree;
    gs->gs_xmlMalloc = xmlMemMalloc;
    gs->gs_xmlMallocAtomic = xmlMemMalloc;
    gs->gs_xmlRealloc = xmlMemRealloc;
    gs->gs_xmlMemStrdup = xmlMemoryStrdup;
#else
    gs->gs_xmlFree = free;
    gs->gs_xmlMalloc = malloc;
    gs->gs_xmlMallocAtomic = malloc;
    gs->gs_xmlRealloc = realloc;
    gs->gs_xmlMemStrdup = xmlPosixStrdup;
#endif
#endif
    gs->gs_xmlGetWarningsDefaultValue = xmlGetWarningsDefaultValueThrDef;
#ifdef LIBXML_OUTPUT_ENABLED
    gs->gs_xmlIndentTreeOutput = xmlIndentTreeOutputThrDef;
    gs->gs_xmlTreeIndentString = xmlTreeIndentStringThrDef;
    gs->gs_xmlSaveNoEmptyTags = xmlSaveNoEmptyTagsThrDef;
#endif
    gs->gs_xmlKeepBlanksDefaultValue = xmlKeepBlanksDefaultValueThrDef;
    gs->gs_xmlLineNumbersDefaultValue = xmlLineNumbersDefaultValueThrDef;
    gs->gs_xmlLoadExtDtdDefaultValue = xmlLoadExtDtdDefaultValueThrDef;
    gs->gs_xmlParserDebugEntities = xmlParserDebugEntitiesThrDef;
    gs->gs_xmlPedanticParserDefaultValue = xmlPedanticParserDefaultValueThrDef;
    gs->gs_xmlSubstituteEntitiesDefaultValue =
        xmlSubstituteEntitiesDefaultValueThrDef;
 
    gs->gs_xmlGenericError = xmlGenericErrorThrDef;
    gs->gs_xmlStructuredError = xmlStructuredErrorThrDef;
    gs->gs_xmlGenericErrorContext = xmlGenericErrorContextThrDef;
    gs->gs_xmlStructuredErrorContext = xmlStructuredErrorContextThrDef;
    gs->gs_xmlRegisterNodeDefaultValue = xmlRegisterNodeDefaultValueThrDef;
    gs->gs_xmlDeregisterNodeDefaultValue = xmlDeregisterNodeDefaultValueThrDef;
 
    gs->gs_xmlParserInputBufferCreateFilenameValue =
        xmlParserInputBufferCreateFilenameValueThrDef;
    gs->gs_xmlOutputBufferCreateFilenameValue =
        xmlOutputBufferCreateFilenameValueThrDef;
    memset(&gs->gs_xmlLastError, 0, sizeof(xmlError));
 
    xmlMutexUnlock(&xmlThrDefMutex);
 
#ifdef HAVE_POSIX_THREADS
    pthread_setspecific(globalkey, gs);
#elif defined HAVE_WIN32_THREADS
#ifndef USE_TLS
    TlsSetValue(globalkey, gs);
#endif
#if defined(LIBXML_STATIC) && !defined(LIBXML_STATIC_FOR_DLL)
    xmlRegisterGlobalStateDtor(gs);
#endif
#endif
 
    gs->initialized = 1;
}
 
#ifndef USE_TLS
static xmlGlobalStatePtr
xmlNewGlobalState(int allowFailure)
{
    xmlGlobalState *gs;
 
    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.
         */
        fprintf(stderr, "libxml2: Failed to allocate globals for thread\n"
                        "libxml2: See xmlCheckThreadLocalStorage\n");
        abort();
    }
 
    memset(gs, 0, sizeof(xmlGlobalState));
    xmlInitGlobalState(gs);
    return (gs);
}
#endif
 
static xmlGlobalStatePtr
xmlGetThreadLocalStorage(int allowFailure) {
    xmlGlobalState *gs;
 
    (void) allowFailure;
 
#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) { \
        if (IS_MAIN_THREAD) \
            return (&name); \
        else \
            return (&xmlGetThreadLocalStorage(0)->gs_##name); \
    }
 
#define XML_OP XML_DEFINE_GLOBAL_WRAPPER
XML_GLOBALS_ALLOC
XML_GLOBALS_ERROR
XML_GLOBALS_HTML
XML_GLOBALS_IO
XML_GLOBALS_PARSER
XML_GLOBALS_TREE
#undef XML_OP
 
/* For backward compatibility */
 
const char *const *
__xmlParserVersion(void) {
    return &xmlParserVersion;
}
 
#endif /* LIBXML_THREAD_ENABLED */
 
int
xmlCheckThreadLocalStorage(void) {
#if defined(LIBXML_THREAD_ENABLED) && !defined(USE_TLS)
    if ((!xmlIsMainThreadInternal()) && (xmlGetThreadLocalStorage(1) == NULL))
        return(-1);
#endif
    return(0);
}
 
#if defined(HAVE_WIN32_THREADS) && \
    (!defined(LIBXML_STATIC) || defined(LIBXML_STATIC_FOR_DLL))
#if defined(LIBXML_STATIC_FOR_DLL)
int
xmlDllMain(ATTRIBUTE_UNUSED void *hinstDLL, unsigned long fdwReason,
           ATTRIBUTE_UNUSED void *lpvReserved)
#else
/* declare to avoid "no previous prototype for 'DllMain'" warning */
/* Note that we do NOT want to include this function declaration in
   a public header because it's meant to be called by Windows itself,
   not a program that uses this library.  This also has to be exported. */
 
XMLPUBFUN BOOL WINAPI
DllMain (HINSTANCE hinstDLL,
         DWORD     fdwReason,
         LPVOID    lpvReserved);
 
BOOL WINAPI
DllMain(ATTRIBUTE_UNUSED HINSTANCE hinstDLL, DWORD fdwReason,
        ATTRIBUTE_UNUSED LPVOID lpvReserved)
#endif
{
    switch (fdwReason) {
        case DLL_THREAD_DETACH:
#ifdef USE_TLS
            xmlFreeGlobalState(&globalState);
#else
            if (globalkey != TLS_OUT_OF_INDEXES) {
                xmlGlobalState *globalval;
 
                globalval = (xmlGlobalState *) TlsGetValue(globalkey);
                if (globalval) {
                    xmlFreeGlobalState(globalval);
                    TlsSetValue(globalkey, NULL);
                }
            }
#endif
            break;
    }
    return TRUE;
}
#endif
 
void
xmlThrDefSetGenericErrorFunc(void *ctx, xmlGenericErrorFunc handler) {
    xmlMutexLock(&xmlThrDefMutex);
    xmlGenericErrorContextThrDef = ctx;
    if (handler != NULL)
    xmlGenericErrorThrDef = handler;
    else
    xmlGenericErrorThrDef = xmlGenericErrorDefaultFunc;
    xmlMutexUnlock(&xmlThrDefMutex);
}
 
void
xmlThrDefSetStructuredErrorFunc(void *ctx, xmlStructuredErrorFunc handler) {
    xmlMutexLock(&xmlThrDefMutex);
    xmlStructuredErrorContextThrDef = ctx;
    xmlStructuredErrorThrDef = handler;
    xmlMutexUnlock(&xmlThrDefMutex);
}
 
xmlBufferAllocationScheme xmlThrDefBufferAllocScheme(xmlBufferAllocationScheme v) {
    xmlBufferAllocationScheme ret;
    xmlMutexLock(&xmlThrDefMutex);
    ret = xmlBufferAllocSchemeThrDef;
    xmlBufferAllocSchemeThrDef = v;
    xmlMutexUnlock(&xmlThrDefMutex);
    return ret;
}
 
int xmlThrDefDefaultBufferSize(int v) {
    int ret;
    xmlMutexLock(&xmlThrDefMutex);
    ret = xmlDefaultBufferSizeThrDef;
    xmlDefaultBufferSizeThrDef = v;
    xmlMutexUnlock(&xmlThrDefMutex);
    return ret;
}
 
int xmlThrDefDoValidityCheckingDefaultValue(int v) {
    int ret;
    xmlMutexLock(&xmlThrDefMutex);
    ret = xmlDoValidityCheckingDefaultValueThrDef;
    xmlDoValidityCheckingDefaultValueThrDef = v;
    xmlMutexUnlock(&xmlThrDefMutex);
    return ret;
}
 
int xmlThrDefGetWarningsDefaultValue(int v) {
    int ret;
    xmlMutexLock(&xmlThrDefMutex);
    ret = xmlGetWarningsDefaultValueThrDef;
    xmlGetWarningsDefaultValueThrDef = v;
    xmlMutexUnlock(&xmlThrDefMutex);
    return ret;
}
 
#ifdef LIBXML_OUTPUT_ENABLED
int xmlThrDefIndentTreeOutput(int v) {
    int ret;
    xmlMutexLock(&xmlThrDefMutex);
    ret = xmlIndentTreeOutputThrDef;
    xmlIndentTreeOutputThrDef = v;
    xmlMutexUnlock(&xmlThrDefMutex);
    return ret;
}
 
const char * xmlThrDefTreeIndentString(const char * v) {
    const char * ret;
    xmlMutexLock(&xmlThrDefMutex);
    ret = xmlTreeIndentStringThrDef;
    xmlTreeIndentStringThrDef = v;
    xmlMutexUnlock(&xmlThrDefMutex);
    return ret;
}
 
int xmlThrDefSaveNoEmptyTags(int v) {
    int ret;
    xmlMutexLock(&xmlThrDefMutex);
    ret = xmlSaveNoEmptyTagsThrDef;
    xmlSaveNoEmptyTagsThrDef = v;
    xmlMutexUnlock(&xmlThrDefMutex);
    return ret;
}
#endif
 
int xmlThrDefKeepBlanksDefaultValue(int v) {
    int ret;
    xmlMutexLock(&xmlThrDefMutex);
    ret = xmlKeepBlanksDefaultValueThrDef;
    xmlKeepBlanksDefaultValueThrDef = v;
    xmlMutexUnlock(&xmlThrDefMutex);
    return ret;
}
 
int xmlThrDefLineNumbersDefaultValue(int v) {
    int ret;
    xmlMutexLock(&xmlThrDefMutex);
    ret = xmlLineNumbersDefaultValueThrDef;
    xmlLineNumbersDefaultValueThrDef = v;
    xmlMutexUnlock(&xmlThrDefMutex);
    return ret;
}
 
int xmlThrDefLoadExtDtdDefaultValue(int v) {
    int ret;
    xmlMutexLock(&xmlThrDefMutex);
    ret = xmlLoadExtDtdDefaultValueThrDef;
    xmlLoadExtDtdDefaultValueThrDef = v;
    xmlMutexUnlock(&xmlThrDefMutex);
    return ret;
}
 
int xmlThrDefParserDebugEntities(int v) {
    int ret;
    xmlMutexLock(&xmlThrDefMutex);
    ret = xmlParserDebugEntitiesThrDef;
    xmlParserDebugEntitiesThrDef = v;
    xmlMutexUnlock(&xmlThrDefMutex);
    return ret;
}
 
int xmlThrDefPedanticParserDefaultValue(int v) {
    int ret;
    xmlMutexLock(&xmlThrDefMutex);
    ret = xmlPedanticParserDefaultValueThrDef;
    xmlPedanticParserDefaultValueThrDef = v;
    xmlMutexUnlock(&xmlThrDefMutex);
    return ret;
}
 
int xmlThrDefSubstituteEntitiesDefaultValue(int v) {
    int ret;
    xmlMutexLock(&xmlThrDefMutex);
    ret = xmlSubstituteEntitiesDefaultValueThrDef;
    xmlSubstituteEntitiesDefaultValueThrDef = v;
    xmlMutexUnlock(&xmlThrDefMutex);
    return ret;
}
 
xmlRegisterNodeFunc
xmlThrDefRegisterNodeDefault(xmlRegisterNodeFunc func)
{
    xmlRegisterNodeFunc old;
 
    xmlMutexLock(&xmlThrDefMutex);
    old = xmlRegisterNodeDefaultValueThrDef;
 
    __xmlRegisterCallbacks = 1;
    xmlRegisterNodeDefaultValueThrDef = func;
    xmlMutexUnlock(&xmlThrDefMutex);
 
    return(old);
}
 
xmlDeregisterNodeFunc
xmlThrDefDeregisterNodeDefault(xmlDeregisterNodeFunc func)
{
    xmlDeregisterNodeFunc old;
 
    xmlMutexLock(&xmlThrDefMutex);
    old = xmlDeregisterNodeDefaultValueThrDef;
 
    __xmlRegisterCallbacks = 1;
    xmlDeregisterNodeDefaultValueThrDef = func;
    xmlMutexUnlock(&xmlThrDefMutex);
 
    return(old);
}
 
xmlParserInputBufferCreateFilenameFunc
xmlThrDefParserInputBufferCreateFilenameDefault(xmlParserInputBufferCreateFilenameFunc func)
{
    xmlParserInputBufferCreateFilenameFunc old;
 
    xmlMutexLock(&xmlThrDefMutex);
    old = xmlParserInputBufferCreateFilenameValueThrDef;
    if (old == NULL) {
        old = __xmlParserInputBufferCreateFilename;
    }
 
    xmlParserInputBufferCreateFilenameValueThrDef = func;
    xmlMutexUnlock(&xmlThrDefMutex);
 
    return(old);
}
 
xmlOutputBufferCreateFilenameFunc
xmlThrDefOutputBufferCreateFilenameDefault(xmlOutputBufferCreateFilenameFunc func)
{
    xmlOutputBufferCreateFilenameFunc old;
 
    xmlMutexLock(&xmlThrDefMutex);
    old = xmlOutputBufferCreateFilenameValueThrDef;
#ifdef LIBXML_OUTPUT_ENABLED
    if (old == NULL) {
        old = __xmlOutputBufferCreateFilename;
    }
#endif
    xmlOutputBufferCreateFilenameValueThrDef = func;
    xmlMutexUnlock(&xmlThrDefMutex);
 
    return(old);
}