/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
*/
#include <fmd_alloc.h>
#include <fmd_eventq.h>
#include <fmd_module.h>
#include <fmd_dispq.h>
#include <fmd_subr.h>
#include <fmd.h>
{
return (eq);
}
void
{
}
}
static void
{
}
void
{
/*
* Here we iterate through the per-module event queue in order to remove
* redundant FMD_EVT_TOPO events. The trick is to not drop a given
* topo event if there are any FM protocol events in the queue after
* it, as those events need to be processed with the correct topology.
*/
while (eqe) {
if (!got_fm_events) {
} else {
}
} else
}
}
/*
* Update statistics when an event is dispatched and placed on a module's event
* queue. This is essentially the same code as kstat_waitq_enter(9F).
*/
static void
{
if (wcnt != 0) {
}
}
void
{
int ok;
/*
* count to free an unreferenced event and just return immediately.
*/
return;
}
if (evt != FMD_EVT_CTL)
}
if (!ok)
}
void
{
int ok;
/*
* count to free an unreferenced event and just return immediately.
*/
return;
}
/*
* fmd makes no guarantees that events will be delivered in time order
* because its transport can make no such guarantees. Instead we make
* a looser guarantee that an enqueued event will be dequeued before
* any newer *pending* events according to event time. This permits us
* to state, for example, that a timer expiry event will be delivered
* prior to any enqueued event whose time is after the timer expired.
* We use a simple insertion sort for this task, as queue lengths are
* typically short and events do *tend* to be received chronologically.
*/
break; /* 'ep' is newer than the event in 'oqe' */
}
if (evt != FMD_EVT_CTL)
else
}
if (!ok)
}
{
top:
return (NULL);
}
/*
* If we dequeued a control event, release it and go back to sleep.
* fmd_event_rele() on the event will block as described in fmd_ctl.c.
* This effectively renders control events invisible to our callers
* as well as to statistics and observability tools (e.g. fmstat(1M)).
*/
goto top;
}
/*
* Before returning, update our statistics. This code is essentially
* kstat_waitq_to_runq(9F), except simplified because our queues are
* always consumed by a single thread (i.e. runq len == 1).
*/
return (ep);
}
/*
* Update statistics when an event is done being processed by the eventq's
* consumer thread. This is essentially kstat_runq_exit(9F) simplified for
* our principle that a single thread consumes the queue (i.e. runq len == 1).
*/
void
{
}
void
{
}
}
}
void
{
}
void
{
}
void
{
}
}