Norman Feske 1ef80e86e2 base: introduce Local_rm for local Region_map
The new 'Local_rm' type offers a narrow interface for the interaction
with the component-local address space, managing the lifetime of
attachments by using the 'Allocation' API.

Fixes #5516
2025-04-10 14:55:57 +02:00

77 lines
1.8 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 Rpc_client<Session>
{
private:
using Local_rm = Local::Constrained_region_map;
Attached_dataspace _event_ds;
size_t const _max_events = _event_ds.size() / sizeof(Input::Event);
friend class Input::Binding;
public:
Session_client(Local_rm &local_rm, Session_capability session)
:
Rpc_client<Session>(session),
_event_ds(local_rm, call<Rpc_dataspace>())
{ }
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(Signal_context_capability sigh) override {
call<Rpc_sigh>(sigh); }
void exclusive(bool enabled) override {
call<Rpc_exclusive>(enabled); }
/**
* Flush and apply functor to pending events
*
* \param fn functor in the form of f(Event const &e)
* \return number of events processed
*/
void for_each_event(auto const &fn)
{
size_t const n = min((size_t)call<Rpc_flush>(), _max_events);
Event const *ev_buf = _event_ds.local_addr<const Event>();
for (size_t i = 0; i < n; ++i)
fn(ev_buf[i]);
}
};
#endif /* _INCLUDE__INPUT_SESSION__CLIENT_H_ */