xmlMutex           23 third_party/libxml/src/include/libxml/threads.h typedef struct _xmlMutex xmlMutex;
xmlMutex           24 third_party/libxml/src/include/libxml/threads.h typedef xmlMutex *xmlMutexPtr;
xmlMutex          192 third_party/libxml/src/threads.c     if ((tok = malloc(sizeof(xmlMutex))) == NULL)