Function acl_readable

lib_acl/src/stdlib/iostuff/acl_readable.c:40–82

# endif

int acl_readable(ACL_SOCKET fd)
{
	struct pollfd fds;
	int    delay = 0;

	fds.fd = fd;
#ifdef ACL_WINDOWS
	fds.events = POLLIN /* | POLLHUP | POLLERR */;
#else
	fds.events = POLLIN | POLLHUP | POLLERR | POLLPRI;
#endif
	fds.revents = 0;

	acl_set_error(0);

	for (;;) {
		switch (__sys_poll(&fds, 1, delay)) {
#ifdef ACL_WINDOWS
		case SOCKET_ERROR:
#else
		case -1:
#endif
			if (acl_last_error() == ACL_EINTR) {
				continue;
			}

			acl_msg_error("%s(%d), %s: poll error(%s), fd: %d",
				__FILE__, __LINE__, __FUNCTION__,
				acl_last_serror(), (int) fd);
			return -1;
		case 0:
			return 0;
		default:
			if ((fds.revents & POLLIN)) {
				return 1;
			} else if (fds.revents & (POLLHUP | POLLERR)) {
				return 1;
			} else {
				return 0;
			}
		}
	}
}

#else