genode/os/include/audio_out_session/rpc_object.h
2013-01-10 23:05:43 +01:00

126 lines
2.7 KiB
C++

/*
* \brief Server-side audio-session interface
* \author Sebastian Sumpf
* \date 2012-12-10
*/
/*
* Copyright (C) 2012-2013 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__AUDIO_OUT_SESSION__RPC_OBJECT_H_
#define _INCLUDE__AUDIO_OUT_SESSION__RPC_OBJECT_H_
#include <base/env.h>
#include <base/rpc_server.h>
#include <audio_out_session/audio_out_session.h>
namespace Audio_out {
class Session_rpc_object;
}
class Audio_out::Session_rpc_object : public Genode::Rpc_object<Audio_out::Session,
Session_rpc_object>
{
protected:
bool _stopped; /* state */
Genode::Ram_dataspace_capability _ds; /* contains Audio_out_stream */
Genode::Signal_transmitter _progress;
Genode::Signal_transmitter _alloc;
Genode::Signal_context_capability _data_cap;
bool _progress_sigh; /* progress signal on/off */
bool _alloc_sigh; /* alloc signal on/off */
public:
Session_rpc_object(Genode::Signal_context_capability data_cap)
:
_stopped(true), _data_cap(data_cap),
_progress_sigh(false), _alloc_sigh(false)
{
_ds = Genode::env()->ram_session()->alloc(sizeof(Stream));
_stream = static_cast<Stream *>(Genode::env()->rm_session()->attach(_ds));
}
virtual ~Session_rpc_object()
{
if (_ds.valid()) {
Genode::env()->rm_session()->detach(_stream);
Genode::env()->ram_session()->free(_ds);
}
}
/**************
** Signals **
**************/
void progress_sigh(Genode::Signal_context_capability sigh)
{
_progress.context(sigh);
_progress_sigh = true;
}
Genode::Signal_context_capability data_avail_sigh() {
return _data_cap; }
void alloc_sigh(Genode::Signal_context_capability sigh)
{
_alloc.context(sigh);
_alloc_sigh = true;
}
/***********************
** Session interface **
***********************/
void start() { _stopped = false; }
void stop() { _stopped = true; }
Genode::Dataspace_capability dataspace() { return _ds; }
/**********************************
** Session interface extensions **
**********************************/
/**
* Send 'progress' signal
*/
void progress_submit()
{
if (_progress_sigh)
_progress.submit();
}
/**
* Send 'alloc' signal
*/
void alloc_submit()
{
if (_alloc_sigh)
_alloc.submit();
}
/**
* Return true if client state is stopped
*/
bool stopped() const { return _stopped; }
/**
* Return true if client session is active
*/
bool active() const { return !_stopped; }
};
#endif /* _INCLUDE__AUDIO_OUT_SESSION__RPC_OBJECT_H_ */