rb_blocking_function_t  534 ext/socket/socket.c     rb_blocking_function_t *func;
rb_blocking_function_t 1171 ext/socket/socket.c     rb_blocking_function_t *func = connect_blocking;
rb_blocking_function_t  702 include/ruby/intern.h VALUE rb_thread_blocking_region(rb_blocking_function_t *func, void *data1,
rb_blocking_function_t 1034 thread.c           rb_blocking_function_t *func, void *data1,
rb_blocking_function_t 1056 thread.c           rb_blocking_function_t *func, void *data1,