rb_thread_id_string_t  202 thread.c       fill_thread_id_string(rb_nativethread_id_t thid, rb_thread_id_string_t buf)
rb_thread_id_string_t  219 thread.c           buf[sizeof(rb_thread_id_string_t)-1] = '\0';
rb_thread_id_string_t  316 thread.c           rb_thread_id_string_t thread_id_string;
rb_thread_id_string_t  712 vm_core.h          rb_thread_id_string_t thread_id_string;