short ddmessage(short apid, short fd, short winid, short mx, short my, short kstate, short pipeid)
{
char c;
short i, msg[8];
long fd_mask;
/* AES-Message define and post */
msg[0] = AP_DRAGDROP;
msg[1] = _AESapid;
msg[2] = 0;
msg[3] = winid;
msg[4] = mx;
msg[5] = my;
msg[6] = kstate;
msg[7] = pipeid;
i = appl_write(apid, 16, msg);
if (i == 0)
{
ddclose(fd);
return(-3);
}
/* receiver reaction */
fd_mask = (1L << fd);
i = Fselect(DD_TIMEOUT, &fd_mask, 0L, 0L);
if (!i || !fd_mask)
{
/* Timeout eingetreten */
ddclose(fd);
return(-2);
}
/* le recepteur refuse (lecture du pipe) */
if (Fread(fd, 1L, &c) != 1L)
{
ddclose(fd);
return(-1);
}
if (c != DD_OK)
{
ddclose(fd);
return(-1);
}
return(1);
}
/*
* Sleep for usec microSeconds
* the actual suspension time can be arbitrarily longer
*
*/
int
usleep (__useconds_t __useconds)
{
long stop;
int r = -ENOSYS;
if (__useconds >= 1000)
r = Fselect((unsigned)(__useconds/1000), 0L, 0L, 0L);
if (r == -ENOSYS) {
stop = _clock() + USEC_TO_CLOCK_TICKS(__useconds);
while (_clock() < stop)
;
r = 0;
}
if (r < 0) {
__set_errno (-r);
return -1;
}
return 0;
}
int
__poll (struct pollfd *fds, unsigned long int nfds, __int32_t __timeout)
{
long int retval;
unsigned long timeout = (unsigned long) __timeout;
#ifdef Fpoll
static int must_emulate = 0;
if (!must_emulate) {
retval = Fpoll (fds, nfds, timeout);
if (retval < 0) {
if (retval != -ENOSYS) {
__set_errno (-retval);
return -1;
} else
must_emulate = 1;
}
}
#endif /* not Fpoll. */
{
/* We must emulate the call via Fselect (). First task is to
set up the file descriptor masks. */
unsigned long rfds = 0;
unsigned long wfds = 0;
unsigned long xfds = 0;
register unsigned long int i;
register struct pollfd* pfds = fds;
for (i = 0; i < nfds; i++) {
if (pfds[i].fd > 31) {
/* We lose. Any better idea than EINVAL? */
__set_errno (EINVAL);
return -1;
}
#define LEGAL_FLAGS \
(POLLIN | POLLPRI | POLLOUT | POLLERR | POLLHUP | POLLNVAL | POLLRDNORM | POLLWRNORM | POLLRDBAND | POLLWRBAND)
if ((pfds[i].events | LEGAL_FLAGS) != LEGAL_FLAGS) {
/* Not supported. */
__set_errno (EINVAL);
return -1;
}
if (pfds[i].events & (POLLIN | POLLRDNORM))
rfds |= (1L << (pfds[i].fd));
if (pfds[i].events & POLLPRI)
xfds |= (1L << (pfds[i].fd));
if (pfds[i].events & (POLLOUT | POLLWRNORM))
wfds |= (1L << (pfds[i].fd));
}
if (timeout == -1UL) {
retval = Fselect (0L, &rfds, &wfds, &xfds);
} else if (timeout == 0) {
retval = Fselect (1L, &rfds, &wfds, &xfds);
} else if (timeout < USHRT_MAX) {
/* The manpage Fselect(2) says that timeout is
signed. But it is really unsigned. */
retval = Fselect (timeout, &rfds, &wfds, &xfds);
} else {
/* Thanks to the former kernel hackers we have
to loop in order to simulate longer timeouts
than USHRT_MAX. */
unsigned long saved_rfds, saved_wfds, saved_xfds;
unsigned short int this_timeout;
int last_round = 0;
saved_rfds = rfds;
saved_wfds = wfds;
saved_xfds = xfds;
do {
if ((unsigned long) timeout > USHRT_MAX)
this_timeout = USHRT_MAX;
else {
this_timeout = timeout;
last_round = 1;
}
retval = Fselect (this_timeout, &rfds, &wfds,
&xfds);
if (retval != 0)
break;
timeout -= this_timeout;
/* I don't know whether we can rely on the
masks not being clobbered on timeout. */
rfds = saved_rfds;
wfds = saved_wfds;
xfds = saved_xfds;
} while (!last_round);
}
if (retval < 0) {
__set_errno (-retval);
return -1;
}
/* Now fill in the results in struct pollfd. */
for (i = 0; i < nfds; i++) {
if (rfds & (1L << (pfds[i].fd)))
pfds[i].revents = (pfds[i].events & (POLLIN | POLLRDNORM));
else
pfds[i].revents = 0;
if (xfds & (1L << (pfds[i].fd)))
pfds[i].revents |= POLLPRI;
if (wfds & (1L << (pfds[i].fd)))
pfds[i].revents |= (pfds[i].events & (POLLOUT | POLLWRNORM));
}
} /* must emulate. */
return retval;
}