90 lines
1.8 KiB
C++
90 lines
1.8 KiB
C++
/*
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* \brief Heartbeat monitoring
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* \author Norman Feske
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* \date 2018-11-15
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*/
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/*
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* Copyright (C) 2018 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU Affero General Public License version 3.
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*/
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#ifndef _SRC__INIT__HEARTBEAT_H_
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#define _SRC__INIT__HEARTBEAT_H_
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/* local includes */
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#include <state_reporter.h>
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#include <child_registry.h>
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#include <util/noncopyable.h>
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namespace Init { class Heartbeat; }
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class Init::Heartbeat : Genode::Noncopyable
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{
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private:
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Env &_env;
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Child_registry &_children;
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Report_update_trigger &_report_update_trigger;
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Constructible<Timer::Connection> _timer { };
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uint64_t _rate_ms = 0;
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Signal_handler<Heartbeat> _timer_handler;
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void _handle_timer()
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{
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bool any_skipped_heartbeats = false;
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_children.for_each_child([&] (Child &child) {
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if (child.skipped_heartbeats())
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any_skipped_heartbeats = true;
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child.heartbeat();
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});
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if (any_skipped_heartbeats)
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_report_update_trigger.trigger_report_update();
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}
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public:
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Heartbeat(Env &env, Child_registry &children,
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Report_update_trigger &report_update_trigger)
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:
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_env(env), _children(children),
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_report_update_trigger(report_update_trigger),
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_timer_handler(_env.ep(), *this, &Heartbeat::_handle_timer)
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{ }
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void apply_config(Xml_node config)
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{
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bool const enabled = config.has_sub_node("heartbeat");
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_timer.conditional(enabled, _env);
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if (!enabled) {
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_rate_ms = 0;
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return;
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}
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unsigned const rate_ms =
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config.sub_node("heartbeat").attribute_value("rate_ms", 1000UL);
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if (rate_ms != _rate_ms) {
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_rate_ms = rate_ms;
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_timer->sigh(_timer_handler);
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_timer->trigger_periodic(_rate_ms*1000);
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}
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}
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};
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#endif /* _SRC__INIT__HEARTBEAT_H_ */
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