From 08bd41b1ecb86264b07b22f7911feae534c842b6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Josef=20S=C3=B6ntgen?= <josef.soentgen@genode-labs.com>
Date: Fri, 28 Sep 2012 15:55:08 +0200
Subject: [PATCH] Noux: add backend pointer to Io_channel

The backend pointer may be used to provide additional methods in a
Io_channel derived class.
---
 ports/src/noux/io_channel.h | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/ports/src/noux/io_channel.h b/ports/src/noux/io_channel.h
index db2820579c..823b0e3b9c 100644
--- a/ports/src/noux/io_channel.h
+++ b/ports/src/noux/io_channel.h
@@ -27,6 +27,20 @@
 
 namespace Noux {
 
+	/**
+	 * Input/output channel backend that is used for calling
+	 * different methos which does not belong to the original
+	 * interface, e.g. network methods.
+	 */
+	class Io_channel_backend
+	{
+		public:
+
+			virtual ~Io_channel_backend() { }
+
+			virtual int type() const { return -1; }
+	};
+
 	/**
 	 * Input/output channel interface
 	 */
@@ -49,6 +63,8 @@ namespace Noux {
 
 			virtual ~Io_channel() { }
 
+			virtual Io_channel_backend* backend() { return 0; }
+
 			virtual bool     write(Sysio *sysio, size_t &count) { return false; }
 			virtual bool      read(Sysio *sysio)                { return false; }
 			virtual bool     fstat(Sysio *sysio)                { return false; }