Roll libxml to 2.9.3

third_party/libxml/src/threads.c

 /**
  * threads.c: set of generic threading related routines
  *
  * See Copyright for the status of this software.
  *
  * Gary Pennington <Gary.Pennington@uk.sun.com>
  * daniel@veillard.com
  */
 
 #define IN_LIBXML
@@ skipping 29 matching lines @@
 
 #if defined(SOLARIS)
 #include <note.h>
 #endif
 
 /* #define DEBUG_THREADS */
 
 #ifdef HAVE_PTHREAD_H
 
 static int libxml_is_threaded = -1;
-#ifdef __GNUC__
+#if defined(__GNUC__) && defined(__GLIBC__)
 #ifdef linux
 #if (__GNUC__ == 3 && __GNUC_MINOR__ >= 3) || (__GNUC__ > 3)
 extern int pthread_once (pthread_once_t *__once_control,
                          void (*__init_routine) (void))
            __attribute((weak));
 extern void *pthread_getspecific (pthread_key_t __key)
            __attribute((weak));
 extern int pthread_setspecific (pthread_key_t __key,
                                 __const void *__pointer)
            __attribute((weak));
@@ skipping 21 matching lines @@
 extern pthread_t pthread_self ()
            __attribute((weak));
 extern int pthread_key_create ()
            __attribute((weak));
 extern int pthread_key_delete ()
            __attribute((weak));
 extern int pthread_cond_signal ()
            __attribute((weak));
 #endif
 #endif /* linux */
-#endif /* __GNUC__ */
+#endif /* defined(__GNUC__) && defined(__GLIBC__) */
 #endif /* HAVE_PTHREAD_H */
 
 /*
  * TODO: this module still uses malloc/free and not xmlMalloc/xmlFree
  *       to avoid some crazyness since xmlMalloc/xmlFree may actually
  *       be hosted on allocated blocks needing them for the allocation ...
  */
 
 /*
  * xmlMutex are a simple mutual exception locks
@@ skipping 305 matching lines @@
     pthread_mutex_lock(&tok->lock);
     tok->held--;
     if (tok->held == 0) {
         if (tok->waiters)
             pthread_cond_signal(&tok->cv);
         memset(&tok->tid, 0, sizeof(tok->tid));
     }
     pthread_mutex_unlock(&tok->lock);
 #elif defined HAVE_WIN32_THREADS
     if (tok->count > 0) {
+        tok->count--;
         LeaveCriticalSection(&tok->cs);
-        tok->count--;
     }
 #elif defined HAVE_BEOS_THREADS
     if (tok->lock->tid == find_thread(NULL)) {
         tok->count--;
         if (tok->count == 0) {
             xmlMutexUnlock(tok->lock);
         }
         return;
     }
 #endif
@@ skipping 600 matching lines @@
                     free(p);
                 }
             }
             break;
     }
     return TRUE;
 }
 #endif
 #define bottom_threads
 #include "elfgcchack.h"