void
chanfd::wcb (int fdn)
{
if (fdi[fdn].wuio.resid ()) {
assert (fdi[fdn].wuio.iovcnt () >= 1);
if (fdi[fdn].fdsendq.empty ()) {
if (fdi[fdn].wuio.output (fdi[fdn].fd) < 0) {
fdi[fdn].seterr ();
return;
}
}
else {
int n = writevfd (fdi[fdn].fd, fdi[fdn].wuio.iov (), 1,
fdi[fdn].fdsendq.front ());
if (n > 0) {
::close (fdi[fdn].fdsendq.pop_front ());
fdi[fdn].wuio.rembytes (n);
}
else {
fdi[fdn].seterr ();
return;
}
}
}
if (fdi[fdn].wuio.resid ())
fdcb (fdi[fdn].fd, selwrite, (wrap (this, &chanfd::wcb, fdn)));
else if (fdi[fdn].weof && fdi[fdn].reof)
fdi[fdn].seterr ();
else
fdcb (fdi[fdn].fd, selwrite, NULL);
}
void
aios::output ()
{
ref<aios> hold = mkref (this); // Don't let this be freed under us
suio *out = outb.tosuio ();
int res;
if (fdsendq.empty ())
res = out->output (fd);
else {
int cnt = out->iovcnt ();
if (cnt > UIO_MAXIOV)
cnt = UIO_MAXIOV;
res = writevfd (fd, out->iov (), cnt, fdsendq.front ());
if (res > 0) {
out->rembytes (res);
::close (fdsendq.pop_front ());
}
else if (res < 0 && errno == EAGAIN)
res = 0;
}
if (res < 0) {
fail (errno);
return;
}
if (res > 0)
timeoutbump ();
if (weof && !out->resid ())
shutdown (fd, SHUT_WR);
wblock = !res;
setoutcb ();
}
ssize_t
writefd (int fd, const void *buf, size_t len, int wfd)
{
struct iovec iov[1];
iov->iov_base = (void *) buf;
iov->iov_len = len;
return writevfd (fd, iov, 1, wfd);
}
ssize_t
writefd(int fd, int wfd)
{
void *buf = "b"; /* Gotta send at least 1 byte along with msg */
size_t len = 1;
struct iovec iov[1];
iov->iov_base = (void *) buf;
iov->iov_len = len;
return writevfd(fd, iov, 1, wfd);
}
