mirror of
https://github.com/genodelabs/genode.git
synced 2024-12-24 15:56:41 +00:00
60d37f690c
When the construction of a member of Packet_stream_*::Rpc_object after the _cap member threw an exception, the object was not dissolved from the entrypoint although the Rpc_object vanished at this point. This was because the call to 'manage()' happened in the initializer list (for the _cap member instantiation). The destruction of the _cap member then did not dissolve the object. This first fix moves the call to 'manage()' into the constructor body after the instantiation of all other members. A more sophisticated fix would use some kind of 'Managed_object' life-time guard that manages an object on construction and dissolves on destruction. Ref #3525
116 lines
3.3 KiB
C++
116 lines
3.3 KiB
C++
/*
|
|
* \brief Server-side interface for packet-stream transmission
|
|
* \author Norman Feske
|
|
* \date 2010-03-01
|
|
*/
|
|
|
|
/*
|
|
* Copyright (C) 2010-2017 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__PACKET_STREAM_TX__RPC_OBJECT_H_
|
|
#define _INCLUDE__PACKET_STREAM_TX__RPC_OBJECT_H_
|
|
|
|
#include <packet_stream_tx/packet_stream_tx.h>
|
|
#include <base/rpc_server.h>
|
|
|
|
namespace Packet_stream_tx { template <typename> class Rpc_object; }
|
|
|
|
|
|
template <typename CHANNEL>
|
|
class Packet_stream_tx::Rpc_object : public Genode::Rpc_object<CHANNEL, Rpc_object<CHANNEL> >
|
|
{
|
|
private:
|
|
|
|
Genode::Rpc_entrypoint &_ep;
|
|
Genode::Capability<CHANNEL> _cap { };
|
|
typename CHANNEL::Sink _sink;
|
|
|
|
Genode::Signal_context_capability _sigh_ready_to_ack;
|
|
Genode::Signal_context_capability _sigh_packet_avail;
|
|
|
|
public:
|
|
|
|
/**
|
|
* Constructor
|
|
*
|
|
* \param ds dataspace used as communication buffer
|
|
* for the transmission packet stream
|
|
* \param ep entry point used for serving the channel's RPC
|
|
* interface
|
|
*/
|
|
Rpc_object(Genode::Dataspace_capability ds,
|
|
Genode::Region_map &rm,
|
|
Genode::Rpc_entrypoint &ep)
|
|
:
|
|
_ep(ep), _sink(ds, rm),
|
|
|
|
/* init signal handlers with default handlers of sink */
|
|
_sigh_ready_to_ack(_sink.sigh_ready_to_ack()),
|
|
_sigh_packet_avail(_sink.sigh_packet_avail())
|
|
{
|
|
_cap = _ep.manage(this);
|
|
}
|
|
|
|
/**
|
|
* Destructor
|
|
*/
|
|
~Rpc_object() { _ep.dissolve(this); }
|
|
|
|
/*
|
|
* The 'sigh_packet_avail()' and 'sigh_ready_to_ack()' methods
|
|
* may be called at session-creation time to override the default
|
|
* data-flow signal handlers as provided by the packet-stream sink.
|
|
* The default handlers let the server block in the event of data
|
|
* congestion. By installing custom signal handlers, a server
|
|
* implementation is able to avoid blocking for a single event by
|
|
* facilitating the use of a select-like mode of operation.
|
|
*
|
|
* Note that calling these methods after the finished creation of
|
|
* the session has no effect because the client queries the signal
|
|
* handlers only once at session-creation time.
|
|
*/
|
|
|
|
/**
|
|
* Override default handler for server-side ready-to-ack signals
|
|
*/
|
|
void sigh_ready_to_ack(Genode::Signal_context_capability sigh) {
|
|
_sigh_ready_to_ack = sigh; }
|
|
|
|
/**
|
|
* Override default handler for server-side packet-avail signals
|
|
*
|
|
* Must be called at constuction time only.
|
|
*/
|
|
void sigh_packet_avail(Genode::Signal_context_capability sigh) {
|
|
_sigh_packet_avail = sigh; }
|
|
|
|
typename CHANNEL::Sink *sink() { return &_sink; }
|
|
|
|
Genode::Capability<CHANNEL> cap() const { return _cap; }
|
|
|
|
|
|
/*******************
|
|
** RPC functions **
|
|
*******************/
|
|
|
|
Genode::Dataspace_capability dataspace() { return _sink.dataspace(); }
|
|
|
|
void sigh_ready_to_submit(Genode::Signal_context_capability sigh) override {
|
|
_sink.register_sigh_ready_to_submit(sigh); }
|
|
|
|
void sigh_ack_avail(Genode::Signal_context_capability sigh) override {
|
|
_sink.register_sigh_ack_avail(sigh); }
|
|
|
|
Genode::Signal_context_capability sigh_ready_to_ack() {
|
|
return _sigh_ready_to_ack; }
|
|
|
|
Genode::Signal_context_capability sigh_packet_avail() {
|
|
return _sigh_packet_avail; }
|
|
};
|
|
|
|
#endif /* _INCLUDE__PACKET_STREAM_TX__RPC_OBJECT_H_ */
|