genode/repos/os/include/input/component.h
Emery Hemingway 71f0757a30 transition Input infrastructure to new base API
* Supply Env to Input::Session_component
* Attach input event dataspace at Input::Client
* Process input events by lambda rather than pointer
* Supply Env and a label to Input::Connection

* Wm serves valid input_session to decorator
* Per-source signal handling at input_merger
* Base API update for dummy_input_drv, test_input
* Input API update for launcher, menu_view, terminal,
  mupdf, sdl, seoul, virtualbox

Ref #1987
2016-10-21 12:39:29 +02:00

110 lines
2.4 KiB
C++

/*
* \brief Frontend of input service
* \author Norman Feske
* \date 2006-08-16
*/
/*
* Copyright (C) 2006-2016 Genode Labs GmbH
*
* 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__INPUT__COMPONENT_H_
#define _INCLUDE__INPUT__COMPONENT_H_
#include <base/env.h>
#include <base/rpc_server.h>
#include <os/attached_ram_dataspace.h>
#include <os/ring_buffer.h>
#include <root/component.h>
#include <input_session/input_session.h>
#include <input/event_queue.h>
namespace Input { class Session_component; }
class Input::Session_component : public Genode::Rpc_object<Input::Session>
{
private:
Genode::Attached_ram_dataspace _ds;
Event_queue _event_queue;
public:
/**
* Constructor
*
* \param env Env containing local region map
* \param ram Ram session at which to allocate session buffer
*/
Session_component(Genode::Env &env, Genode::Ram_session &ram)
: _ds(ram, env.rm(),
Event_queue::QUEUE_SIZE*sizeof(Input::Event)) { }
/**
* Constructor
*
* \noapi
* \deprecated
*/
Session_component()
: _ds(*Genode::env()->ram_session(),
*Genode::env()->rm_session(),
Event_queue::QUEUE_SIZE*sizeof(Input::Event))
{ }
/**
* Return reference to event queue of the session
*/
Event_queue &event_queue() { return _event_queue; }
/**
* Submit input event to event queue
*/
void submit(Input::Event event)
{
try {
_event_queue.add(event);
} catch (Input::Event_queue::Overflow) {
Genode::warning("input overflow - resetting queue");
_event_queue.reset();
}
}
/******************************
** Input::Session interface **
******************************/
Genode::Dataspace_capability dataspace() override { return _ds.cap(); }
bool pending() const override { return !_event_queue.empty(); }
/*
* \deprecated use 'pending' instead
*/
bool is_pending() const { return pending(); }
int flush() override
{
Input::Event *dst = _ds.local_addr<Input::Event>();
unsigned cnt = 0;
for (; cnt < Event_queue::QUEUE_SIZE && !_event_queue.empty(); cnt++)
*dst++ = _event_queue.get();
return cnt;
}
void sigh(Genode::Signal_context_capability sigh) override
{
_event_queue.sigh(sigh);
}
};
#endif /* _INCLUDE__INPUT__COMPONENT_H_ */