Upgrade to libxml 2.9.2 and libxslt 1.1.28

third_party/libxml/src/threads.c

Index: third_party/libxml/src/threads.c
diff --git a/third_party/libxml/src/threads.c b/third_party/libxml/src/threads.c
index 98fd2c23f2e8b676030ff5f1a28e585e55f31e00..8921204b3c2eef6ac917297c564664dfe13731ad 100644
--- a/third_party/libxml/src/threads.c
+++ b/third_party/libxml/src/threads.c
@@ -146,6 +146,7 @@ struct _xmlRMutex {
 static pthread_key_t globalkey;
 static pthread_t mainthread;
 static pthread_once_t once_control = PTHREAD_ONCE_INIT;
+static pthread_once_t once_control_init = PTHREAD_ONCE_INIT;
 static pthread_mutex_t global_init_lock = PTHREAD_MUTEX_INITIALIZER;
 #elif defined HAVE_WIN32_THREADS
 #if defined(HAVE_COMPILER_TLS)
@@ -251,7 +252,6 @@ xmlMutexLock(xmlMutexPtr tok)
 #ifdef DEBUG_THREADS
         xmlGenericError(xmlGenericErrorContext,
                         "xmlMutexLock():BeOS:Couldn't aquire semaphore\n");
-        exit();
 #endif
     }
     tok->tid = find_thread(NULL);
@@ -378,7 +378,7 @@ xmlRMutexLock(xmlRMutexPtr tok)
     pthread_mutex_unlock(&tok->lock);
 #elif defined HAVE_WIN32_THREADS
     EnterCriticalSection(&tok->cs);
-    ++tok->count;
+    tok->count++;
 #elif defined HAVE_BEOS_THREADS
     if (tok->lock->tid == find_thread(NULL)) {
         tok->count++;
@@ -414,8 +414,10 @@ xmlRMutexUnlock(xmlRMutexPtr tok ATTRIBUTE_UNUSED)
     }
     pthread_mutex_unlock(&tok->lock);
 #elif defined HAVE_WIN32_THREADS
-    if (!--tok->count)
+    if (tok->count > 0) {
         LeaveCriticalSection(&tok->cs);
+	tok->count--;
+    }
 #elif defined HAVE_BEOS_THREADS
     if (tok->lock->tid == find_thread(NULL)) {
         tok->count--;
@@ -439,7 +441,8 @@ __xmlGlobalInitMutexLock(void)
     /* Make sure the global init lock is initialized and then lock it. */
 #ifdef HAVE_PTHREAD_H
     /* The mutex is statically initialized, so we just lock it. */
-    pthread_mutex_lock(&global_init_lock);
+    if (pthread_mutex_lock != NULL)
+        pthread_mutex_lock(&global_init_lock);
 #elif defined HAVE_WIN32_THREADS
     LPCRITICAL_SECTION cs;
 
@@ -498,7 +501,6 @@ __xmlGlobalInitMutexLock(void)
 #ifdef DEBUG_THREADS
         xmlGenericError(xmlGenericErrorContext,
                         "xmlGlobalInitMutexLock():BeOS:Couldn't acquire semaphore\n");
-        exit();
 #endif
     }
 #endif
@@ -508,7 +510,8 @@ void
 __xmlGlobalInitMutexUnlock(void)
 {
 #ifdef HAVE_PTHREAD_H
-    pthread_mutex_unlock(&global_init_lock);
+    if (pthread_mutex_unlock != NULL)
+        pthread_mutex_unlock(&global_init_lock);
 #elif defined HAVE_WIN32_THREADS
     if (global_init_lock != NULL) {
 	LeaveCriticalSection(global_init_lock);
@@ -913,6 +916,7 @@ xmlCleanupThreads(void)
 #ifdef HAVE_PTHREAD_H
     if ((libxml_is_threaded)  && (pthread_key_delete != NULL))
         pthread_key_delete(globalkey);
+    once_control = once_control_init;
 #elif defined(HAVE_WIN32_THREADS) && !defined(HAVE_COMPILER_TLS) && (!defined(LIBXML_STATIC) || defined(LIBXML_STATIC_FOR_DLL))
     if (globalkey != TLS_OUT_OF_INDEXES) {
         xmlGlobalStateCleanupHelperParams *p;
@@ -952,6 +956,7 @@ xmlOnceInit(void)
 #ifdef HAVE_PTHREAD_H
     (void) pthread_key_create(&globalkey, xmlFreeGlobalState);
     mainthread = pthread_self();
+    __xmlInitializeDict();
 #elif defined(HAVE_WIN32_THREADS)
     if (!run_once.done) {
         if (InterlockedIncrement(&run_once.control) == 1) {
@@ -959,6 +964,7 @@ xmlOnceInit(void)
             globalkey = TlsAlloc();
 #endif
             mainthread = GetCurrentThreadId();
+	    __xmlInitializeDict();
             run_once.done = 1;
         } else {
             /* Another thread is working; give up our slice and
@@ -972,6 +978,7 @@ xmlOnceInit(void)
         globalkey = tls_allocate();
         tls_set(globalkey, NULL);
         mainthread = find_thread(NULL);
+	__xmlInitializeDict();
     } else
         atomic_add(&run_once_init, -1);
 #endif