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File_system clients may now watch files and directories for changes by opening a 'Watch_handle' rather than submitting a 'CONTENT_CHANGED' packet to the server. When a change happens at a node with an open Watch_handle a CONTENT_CHANGED packet will be sent from the server to the client. This serializes registration with other handle operations and separates I/O handle state from notification handle state. Test at run/fs_rom_update. Ref #1934
62 lines
1.5 KiB
C++
62 lines
1.5 KiB
C++
/*
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* \brief Server-side file-system session interface
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* \author Norman Feske
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* \date 2012-04-05
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*/
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/*
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* Copyright (C) 2012-2017 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU Affero General Public License version 3.
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*/
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#ifndef _INCLUDE__FILE_SYSTEM_SESSION__SERVER_H_
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#define _INCLUDE__FILE_SYSTEM_SESSION__SERVER_H_
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#include <file_system_session/file_system_session.h>
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#include <packet_stream_tx/rpc_object.h>
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#include <base/rpc_server.h>
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namespace File_system { class Session_rpc_object; }
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class File_system::Session_rpc_object : public Genode::Rpc_object<Session, Session_rpc_object>
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{
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protected:
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Packet_stream_tx::Rpc_object<Tx> _tx;
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public:
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/**
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* Constructor
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*
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* \param tx_ds dataspace used as communication buffer
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* for the tx packet stream
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* \param ep entry point used for packet-stream channel
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*/
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Session_rpc_object(Genode::Dataspace_capability tx_ds,
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Genode::Region_map &rm,
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Genode::Rpc_entrypoint &ep)
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: _tx(tx_ds, rm, ep) { }
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/**
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* Return capability to packet-stream channel
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*
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* This method is called by the client via an RPC call at session
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* construction time.
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*/
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Genode::Capability<Tx> _tx_cap() { return _tx.cap(); }
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Tx::Sink *tx_sink() { return _tx.sink(); }
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/**
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* Default stub implementation
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*/
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Watch_handle watch(Path const &) override {
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throw Unavailable(); }
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};
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#endif /* _INCLUDE__FILE_SYSTEM_SESSION__SERVER_H_ */
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