genode/repos/os/include/input_session/client.h
Emery Hemingway c18bee3d5b Input::Binding for non-C++ language bindings
Quietly insert forward declaration of a Input::Binding class, and make
it a friend of Input::Event and Input::Session_client. This is to allow
non-C++ language bindings (Nim) to access private members by providing
their own implementation of the Binding class.

Fix #2889
2018-07-03 09:39:35 +02:00

86 lines
2.0 KiB
C++

/*
* \brief Client-side input session interface
* \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_SESSION__CLIENT_H_
#define _INCLUDE__INPUT_SESSION__CLIENT_H_
#include <input_session/capability.h>
#include <input/event.h>
#include <base/attached_dataspace.h>
#include <base/rpc_client.h>
namespace Input { struct Session_client; }
class Input::Session_client : public Genode::Rpc_client<Session>
{
private:
Genode::Attached_dataspace _event_ds;
Genode::size_t const _max_events =
_event_ds.size() / sizeof(Input::Event);
friend class Input::Binding;
public:
Session_client(Genode::Region_map &local_rm, Session_capability session)
:
Genode::Rpc_client<Session>(session),
_event_ds(local_rm, call<Rpc_dataspace>())
{ }
/**
* Constructor
*
* \deprecated
* \noapi
*/
explicit Session_client(Session_capability session) __attribute__((deprecated))
:
Genode::Rpc_client<Session>(session),
_event_ds(*Genode::env_deprecated()->rm_session(), call<Rpc_dataspace>())
{ }
Genode::Dataspace_capability dataspace() override {
return call<Rpc_dataspace>(); }
bool pending() const override {
return call<Rpc_pending>(); }
int flush() override {
return call<Rpc_flush>(); }
void sigh(Genode::Signal_context_capability sigh) override {
call<Rpc_sigh>(sigh); }
/**
* Flush and apply functor to pending events
*
* \param func functor in the form of f(Event const &e)
* \return number of events processed
*/
template <typename FUNC>
void for_each_event(FUNC const &func)
{
Genode::size_t const n = Genode::min((Genode::size_t)call<Rpc_flush>(), _max_events);
Event const *ev_buf = _event_ds.local_addr<const Event>();
for (Genode::size_t i = 0; i < n; ++i)
func(ev_buf[i]);
}
};
#endif /* _INCLUDE__INPUT_SESSION__CLIENT_H_ */