/* Main routine, called by client to do a sort. */
void
quick_sort(float *data, int n)
{
if (quick_sort_workpile == NULL) {
int n_threads = 6;
quick_sort_workpile = work_init(2 << DEFER_DEPTH,
quick_sort_worker, n_threads);
assert(quick_sort_workpile != NULL);
}
quick_sort_aux(data, n, 0, quick_sort_workpile, FALSE);
/* Wait for all work to finish */
work_wait(quick_sort_workpile);
#ifdef QUICK_DEBUG
printf( "== Quicksort: done sorting\n" );
#endif
}
void
job_accept (conf_t conf)
{
work_p w;
m_msg_t m;
int sd;
assert (conf != NULL);
assert (conf->ld >= 0);
if (!(w = work_init ((work_func_t) _job_exec, conf->nthreads))) {
log_errno (EMUNGE_SNAFU, LOG_ERR,
"Failed to create %d work thread%s", conf->nthreads,
((conf->nthreads > 1) ? "s" : ""));
}
log_msg (LOG_INFO, "Created %d work thread%s", conf->nthreads,
((conf->nthreads > 1) ? "s" : ""));
while (!done) {
if ((sd = accept (conf->ld, NULL, NULL)) < 0) {
switch (errno) {
case ECONNABORTED:
case EINTR:
continue;
case EMFILE:
case ENFILE:
case ENOBUFS:
case ENOMEM:
log_msg (LOG_INFO,
"Suspended new connections while processing backlog");
work_wait (w);
continue;
default:
log_errno (EMUNGE_SNAFU, LOG_ERR,
"Failed to accept connection");
break;
}
}
/* With fd_timed_read_n(), a poll() is performed before any read()
* in order to provide timeouts and ensure the read() won't block.
* As such, it shouldn't be necessary to set the client socket as
* non-blocking. However according to the Linux poll(2) and
* select(2) manpages, spurious readiness notifications can occur.
* poll()/select() may report a socket as ready for reading while
* the subsequent read() blocks. This could happen when data has
* arrived, but upon examination is discarded due to an invalid
* checksum. To protect against this, the client socket is set
* non-blocking and EAGAIN is handled appropriately.
*/
if (fd_set_nonblocking (sd) < 0) {
close (sd);
log_msg (LOG_WARNING,
"Failed to set nonblocking client socket: %s",
strerror (errno));
}
else if (m_msg_create (&m) != EMUNGE_SUCCESS) {
close (sd);
log_msg (LOG_WARNING, "Failed to create client request");
}
else if (m_msg_bind (m, sd) != EMUNGE_SUCCESS) {
m_msg_destroy (m);
log_msg (LOG_WARNING, "Failed to bind socket for client request");
}
else if (work_queue (w, m) < 0) {
m_msg_destroy (m);
log_msg (LOG_WARNING, "Failed to queue client request");
}
}
log_msg (LOG_NOTICE, "Exiting on signal=%d", done);
work_fini (w, 1);
return;
}
