rsock_sock_listen  350 ext/socket/rubysocket.h VALUE rsock_sock_listen(VALUE sock, VALUE log);
rsock_sock_listen 2034 ext/socket/socket.c     rb_define_method(rb_cSocket, "listen", rsock_sock_listen, 1);
rsock_sock_listen  145 ext/socket/tcpserver.c     rb_define_method(rb_cTCPServer, "listen", rsock_sock_listen, 1); /* in socket.c */
rsock_sock_listen  124 ext/socket/unixserver.c     rb_define_method(rb_cUNIXServer, "listen", rsock_sock_listen, 1); /* in socket.c */