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0ed68a56b7
This patch changes both the Input::Session interface and the skeleton
for the server-side implementation of this interface
('input/component.h').
The Input::Session interface offers a new 'sigh' function, which can be
called be the client to register a signal handler. The signal handler
gets notified on the arrival of new input. This alleviates the need to
poll for input events at the client side.
The server-side skeleton for implementing input services underwent a
redesign to make it more modular and robust. I.e., there are no
global functions needed at the server side and the event-queue
enable/disable mechanism is implemented at a central place (in the root
component) rather than inside each driver.
Fixes #46
69 lines
1.6 KiB
C++
69 lines
1.6 KiB
C++
/*
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* \brief Input session interface
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* \author Norman Feske
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* \date 2006-08-16
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*/
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/*
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* Copyright (C) 2006-2013 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 General Public License version 2.
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*/
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#ifndef _INCLUDE__INPUT_SESSION__INPUT_SESSION_H_
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#define _INCLUDE__INPUT_SESSION__INPUT_SESSION_H_
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#include <dataspace/capability.h>
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#include <base/rpc_server.h>
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#include <session/session.h>
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#include <base/signal.h>
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namespace Input {
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struct Session : Genode::Session
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{
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static const char *service_name() { return "Input"; }
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virtual ~Session() { }
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/**
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* Return capability to event buffer dataspace
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*/
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virtual Genode::Dataspace_capability dataspace() = 0;
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/**
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* Request input state
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*
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* \return true if new events are available
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*/
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virtual bool is_pending() const = 0;
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/**
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* Flush pending events to event buffer
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*
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* \return number of flushed events
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*/
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virtual int flush() = 0;
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/**
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* Register signal handler to be notified on arrival of new input
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*/
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virtual void sigh(Genode::Signal_context_capability) = 0;
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/*********************
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** RPC declaration **
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*********************/
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GENODE_RPC(Rpc_dataspace, Genode::Dataspace_capability, dataspace);
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GENODE_RPC(Rpc_is_pending, bool, is_pending);
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GENODE_RPC(Rpc_flush, int, flush);
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GENODE_RPC(Rpc_sigh, void, sigh, Genode::Signal_context_capability);
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GENODE_RPC_INTERFACE(Rpc_dataspace, Rpc_is_pending, Rpc_flush, Rpc_sigh);
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};
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}
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#endif /* _INCLUDE__INPUT_SESSION__INPUT_SESSION_H_ */
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