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Use signals for delivering input events

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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
This commit is contained in:
Norman Feske
2014-05-07 10:33:20 +02:00
committed by Christian Helmuth
parent 6c10bfe049
commit 0ed68a56b7
39 changed files with 643 additions and 733 deletions
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25
repos/gems/src/server/d3m/input_service.h
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@@ -110,6 +110,14 @@ namespace Input {
* Flush input events
*/
Genode::size_t flush() { return _client.flush(); }
/**
* Register signal handler for input notifications
*/
void sigh(Genode::Signal_context_capability sigh)
{
_client.sigh(sigh);
}
};
@@ -183,6 +191,12 @@ namespace Input {
}
return dst_count;
}
void sigh(Genode::Signal_context_capability sigh)
{
for (Source *e = _sources.first(); e; e = e->next())
e->sigh(sigh);
}
};
@@ -214,18 +228,23 @@ namespace Input {
** Input-session interface **
*****************************/
Genode::Dataspace_capability dataspace() { return _ev_ds.cap(); }
Genode::Dataspace_capability dataspace() override { return _ev_ds.cap(); }
bool is_pending() const
bool is_pending() const override
{
return _source_registry.any_source_has_pending_input();
}
int flush()
int flush() override
{
return _source_registry.flush_sources(_ev_ds.local_addr<Event>(),
MAX_EVENTS);
}
void sigh(Genode::Signal_context_capability sigh) override
{
_source_registry.sigh(sigh);
}
};
/**