genode/repos/os/include/timer_session/timer_session.h

/*
 * \brief  Timer session interface
 * \author Norman Feske
 * \author Markus Partheymueller
 * \date   2006-08-15
 */

/*
 * Copyright (C) 2006-2013 Genode Labs GmbH
 * Copyright (C) 2012 Intel Corporation
 *
 * This file is part of the Genode OS framework, which is distributed
 * under the terms of the GNU General Public License version 2.
 */

#ifndef _INCLUDE__TIMER_SESSION__TIMER_SESSION_H_
#define _INCLUDE__TIMER_SESSION__TIMER_SESSION_H_

#include <base/signal.h>
#include <session/session.h>

namespace Timer {

	using namespace Genode;

	struct Session : Genode::Session
	{
		static const char *service_name() { return "Timer"; }

		virtual ~Session() { }

		/**
		 * Program single timeout (relative from now in microseconds)
		 */
		virtual void trigger_once(unsigned us) = 0;

		/**
		 * Program periodic timeout (in microseconds)
		 *
		 * The first period will be triggered after 'us' at the latest,
		 * but it might be triggered earlier as well.
		 */
		virtual void trigger_periodic(unsigned us) = 0;

		/**
		 * Register timeout signal handler
		 */
		virtual void sigh(Signal_context_capability sigh) = 0;

		/**
		 * Return number of elapsed milliseconds since session creation
		 */
		virtual unsigned long elapsed_ms() const = 0;

		/**
		 * Client-side convenience function for sleeping the specified number
		 * of milliseconds
		 */
		virtual void msleep(unsigned ms) = 0;

		/**
		 * Client-side convenience function for sleeping the specified number
		 * of microseconds
		 */
		virtual void usleep(unsigned us) = 0;


		/*********************
		 ** RPC declaration **
		 *********************/

		GENODE_RPC(Rpc_trigger_once, void, trigger_once, unsigned);
		GENODE_RPC(Rpc_trigger_periodic, void, trigger_periodic, unsigned);
		GENODE_RPC(Rpc_sigh, void, sigh, Genode::Signal_context_capability);
		GENODE_RPC(Rpc_elapsed_ms, unsigned long, elapsed_ms);

		GENODE_RPC_INTERFACE(Rpc_trigger_once, Rpc_trigger_periodic,
		                     Rpc_sigh, Rpc_elapsed_ms);
	};
}

#endif /* _INCLUDE__TIMER_SESSION__TIMER_SESSION_H_ */