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/*
* Copyright (c) 2019 Ilya Maximets <i.maximets@ovn.org>.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <config.h>
#include "openvswitch/compiler.h"
#include "openvswitch/thread.h"
#include "openvswitch/util.h"
#include "if-notifier.h"
/* Implementation of a manual interface notifier.
*
* Intended for catching interface events that could not be tracked by
* OS specific interface notifiers, e.g. iface updates in netdev-dpdk.
* For that purpose 'if_notifier_manual_report()' should be called directly
* by the code that aware of interface changes.
*
* Thread-safety
* =============
* This notifier is thread-safe in terms of calling its functions from
* different thread contexts, however if the callback passed to
* 'if_notifier_manual_set_cb' is used by some other code (i.e. by OS
* specific notifiers) it must be thread-safe itself.
*/
static struct ovs_mutex manual_notifier_mutex = OVS_MUTEX_INITIALIZER;
static if_notify_func *notify OVS_GUARDED_BY(manual_notifier_mutex) = NULL;
void
if_notifier_manual_set_cb(if_notify_func *cb)
{
ovs_mutex_lock(&manual_notifier_mutex);
notify = cb;
ovs_mutex_unlock(&manual_notifier_mutex);
}
void
if_notifier_manual_report(void)
{
ovs_mutex_lock(&manual_notifier_mutex);
if (notify) {
notify(NULL);
}
ovs_mutex_unlock(&manual_notifier_mutex);
}
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