mirror of
https://github.com/genodelabs/genode.git
synced 2024-12-24 07:46:42 +00:00
93 lines
2.0 KiB
C++
93 lines
2.0 KiB
C++
/*
|
|
* \brief Frontend of input service
|
|
* \author Norman Feske
|
|
* \date 2006-08-16
|
|
*/
|
|
|
|
/*
|
|
* Copyright (C) 2006-2017 Genode Labs GmbH
|
|
*
|
|
* This file is part of the Genode OS framework, which is distributed
|
|
* under the terms of the GNU Affero General Public License version 3.
|
|
*/
|
|
|
|
#ifndef _INCLUDE__INPUT__COMPONENT_H_
|
|
#define _INCLUDE__INPUT__COMPONENT_H_
|
|
|
|
#include <base/env.h>
|
|
#include <base/rpc_server.h>
|
|
#include <base/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 ram allocator for the session buffer
|
|
*/
|
|
Session_component(Genode::Env &env, Genode::Ram_allocator &ram)
|
|
:
|
|
_ds(ram, env.rm(), 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(); }
|
|
|
|
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_ */
|