INVALID_SOCKET    149 ext/net/gauche/net.h #define SOCKET_CLOSED(fd)  ((fd) == INVALID_SOCKET)
INVALID_SOCKET    150 ext/net/gauche/net.h #define SOCKET_INVALID(fd) ((fd) == INVALID_SOCKET)
INVALID_SOCKET     56 ext/net/net.c          sock->fd = INVALID_SOCKET;
INVALID_SOCKET    136 ext/net/net.c      s->fd = INVALID_SOCKET;
INVALID_SOCKET    481 ext/net/net.c  	r = setsockopt(INVALID_SOCKET, SOL_SOCKET,