7791937e84
In contrast to most information of init's state reports, which can be monitored at a relatively low rate (like 2 seconds in Sculpt's runtime), resource requests call for an immediate response by the consumer of the report. Otherwise the requesting child stays unnecessarily blocked until the next rate-limited state report is due. This patch adds a fast lane for such low-latency state updates to init.
88 lines
2.4 KiB
C++
88 lines
2.4 KiB
C++
/*
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* \brief Report configuration
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* \author Norman Feske
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* \date 2017-01-16
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*/
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/*
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* Copyright (C) 2017 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__REPORT_H_
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#define _SRC__INIT__REPORT_H_
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#include <util/noncopyable.h>
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#include <util/xml_node.h>
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namespace Init {
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struct Report_update_trigger;
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struct Report_detail;
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}
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class Init::Report_detail : Genode::Noncopyable
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{
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private:
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bool _children = false;
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bool _ids = false;
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bool _requested = false;
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bool _provided = false;
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bool _session_args = false;
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bool _child_ram = false;
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bool _child_caps = false;
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bool _init_ram = false;
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bool _init_caps = false;
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public:
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Report_detail() { }
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Report_detail(Genode::Xml_node report)
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{
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_children = true;
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_ids = report.attribute_value("ids", false);
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_requested = report.attribute_value("requested", false);
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_provided = report.attribute_value("provided", false);
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_session_args = report.attribute_value("session_args", false);
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_child_ram = report.attribute_value("child_ram", false);
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_child_caps = report.attribute_value("child_caps", false);
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_init_ram = report.attribute_value("init_ram", false);
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_init_caps = report.attribute_value("init_caps", false);
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}
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bool children() const { return _children; }
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bool ids() const { return _ids; }
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bool requested() const { return _requested; }
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bool provided() const { return _provided; }
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bool session_args() const { return _session_args; }
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bool child_ram() const { return _child_ram; }
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bool child_caps() const { return _child_caps; }
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bool init_ram() const { return _init_ram; }
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bool init_caps() const { return _init_caps; }
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};
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struct Init::Report_update_trigger : Interface
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{
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/**
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* Trigger regular (rate-limited) report update
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*/
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virtual void trigger_report_update() = 0;
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/**
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* Trigger immediate report update
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*
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* This method is intended for situations that require a timely response of
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* the consumer of the report. This is particularly important for resource
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* requests that would otherwise unnecessarily stall the execution of the
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* respective child.
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*/
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virtual void trigger_immediate_report_update() = 0;
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};
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#endif /* _SRC__INIT__REPORT_H_ */
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