68 lines
1.5 KiB
C++
68 lines
1.5 KiB
C++
/*
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* \brief Root interface to timer service
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* \author Norman Feske
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* \author Martin Stein
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* \date 2006-08-15
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*/
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/*
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* Copyright (C) 2006-2017 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 _ROOT_COMPONENT_H_
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#define _ROOT_COMPONENT_H_
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/* Genode includes */
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#include <root/component.h>
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/* local includes */
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#include <time_source.h>
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#include <session_component.h>
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namespace Timer { class Root_component; }
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class Timer::Root_component : public Genode::Root_component<Session_component>
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{
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private:
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enum { MIN_TIMEOUT_US = 1000 };
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Time_source _time_source;
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Genode::Alarm_timeout_scheduler _timeout_scheduler;
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/********************
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** Root_component **
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********************/
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Session_component *_create_session(const char *args) override
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{
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using namespace Genode;
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size_t const ram_quota =
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Arg_string::find_arg(args, "ram_quota").ulong_value(0);
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if (ram_quota < sizeof(Session_component)) {
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throw Insufficient_ram_quota(); }
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return new (md_alloc())
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Session_component(_timeout_scheduler);
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}
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public:
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Root_component(Genode::Env &env, Genode::Allocator &md_alloc)
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:
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Genode::Root_component<Session_component>(&env.ep().rpc_ep(), &md_alloc),
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_time_source(env),
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_timeout_scheduler(_time_source, Microseconds(MIN_TIMEOUT_US))
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{
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_timeout_scheduler._enable();
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}
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};
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#endif /* _ROOT_COMPONENT_H_ */
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