/* Wake up a specific attachment waiting to read events.*/
int et_wakeup_attachment(et_sys_id id, et_att_id att)
{
int status;
et_id *etid = (et_id *) id;
et_stat_id stat_id;
et_station *ps;
et_list *pl, *pl_gc;
if (att < 0) {
if (etid->debug >= ET_DEBUG_ERROR) {
et_logmsg("ERROR", "et_wakeup_attachment, bad argument\n");
}
return ET_ERROR;
}
if (etid->locality != ET_LOCAL) {
return etr_wakeup_attachment(id, att);
}
/* Protection from (local) et_close() unmapping shared memory */
et_memRead_lock(etid);
/* Has caller already called et_close()? */
if (etid->closed) {
et_mem_unlock(etid);
if (etid->debug >= ET_DEBUG_ERROR) {
et_logmsg("ERROR", "et_wakeup_attachment, et id is closed\n");
}
return ET_ERROR_CLOSED;
}
stat_id = etid->sys->attach[att].stat;
ps = etid->grandcentral + stat_id;
pl = &ps->list_in;
pl_gc = &etid->grandcentral->list_in;
if (att >= etid->sys->config.nattachments) {
et_mem_unlock(etid);
if (etid->debug >= ET_DEBUG_ERROR) {
et_logmsg("ERROR", "et_wakeup_attachment, bad argument\n");
}
return ET_ERROR;
}
/* Only tell things to wake up if they are sleeping, otherwise
* after the NEXT read, it will quit as if being woken up! */
if ((etid->sys->attach[att].blocked == ET_ATT_UNBLOCKED) &&
(etid->sys->attach[att].sleep == ET_ATT_NOSLEEP)) {
et_mem_unlock(etid);
if (etid->debug >= ET_DEBUG_WARN) {
et_logmsg("WARN", "et_wakeup_attachment, attachment is NOT blocked so not sending wakeup signal\n");
}
return ET_OK;
}
if (etid->debug >= ET_DEBUG_INFO) {
et_logmsg("INFO", "et_wakeup_attachment, waking up attachment %d\n", att);
}
/* attachment may be waiting on a "get", so wake own station in list */
etid->sys->attach[att].quit = ET_ATT_QUIT;
status = pthread_cond_broadcast(&pl->cread);
if (status != 0) {
err_abort(status, "Wakeup readers");
}
/* attachment may be waiting on a "new", so wake GrandCentral's in list */
status = pthread_cond_broadcast(&pl_gc->cread);
if (status != 0) {
err_abort(status, "Wakeup readers");
}
et_mem_unlock(etid);
return ET_OK;
}
int et_wakeup_attachment(et_sys_id id, et_att_id att)
{
return etr_wakeup_attachment(id, att);
}
