From f98359cbe6b449a1fadc25c14dfcc6954ca6be44 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Michael=20M=C3=BCller?= <michael.mueller@uos.de>
Date: Mon, 11 Jul 2022 14:26:28 +0200
Subject: [PATCH] hello_tutorial: Made hello session stateful.

---
 .../include/hello_session/connection.h        | 15 ++++++++-------
 .../include/hello_session/hello_session.h     |  2 ++
 repos/hello_tutorial/src/hello/client/main.cc |  5 +++--
 repos/hello_tutorial/src/hello/server/main.cc | 19 +++++++++++++------
 4 files changed, 26 insertions(+), 15 deletions(-)

diff --git a/repos/hello_tutorial/include/hello_session/connection.h b/repos/hello_tutorial/include/hello_session/connection.h
index a21b0109fe..51b1e31f0a 100644
--- a/repos/hello_tutorial/include/hello_session/connection.h
+++ b/repos/hello_tutorial/include/hello_session/connection.h
@@ -22,14 +22,15 @@ namespace Hello { struct Connection; }
 
 struct Hello::Connection : Genode::Connection<Session>, Session_client
 {
-	Connection(Genode::Env &env)
-	:
-		/* create session */
-		Genode::Connection<Hello::Session>(env, session(env.parent(),
-		                                                "ram_quota=6K, cap_quota=4")),
+	Connection(Genode::Env &env, unsigned short id)
+		: /* create session */
+		  Genode::Connection<Hello::Session>(env, session(env.parent(),
+														  "ram_quota=6K, cap_quota=4")),
 
-		/* initialize RPC interface */
-		Session_client(cap()) { }
+		  /* initialize RPC interface */
+		  Session_client(cap())
+	{
+	}
 };
 
 #endif /* _INCLUDE__HELLO_SESSION__CONNECTION_H_ */
diff --git a/repos/hello_tutorial/include/hello_session/hello_session.h b/repos/hello_tutorial/include/hello_session/hello_session.h
index 8ff65e2ea8..db22c92084 100644
--- a/repos/hello_tutorial/include/hello_session/hello_session.h
+++ b/repos/hello_tutorial/include/hello_session/hello_session.h
@@ -24,6 +24,8 @@ struct Hello::Session : Genode::Session
 {
 	static const char *service_name() { return "Hello"; }
 
+	unsigned short _id;
+
 	enum { CAP_QUOTA = 2 };
 
 	virtual void say_hello() = 0;
diff --git a/repos/hello_tutorial/src/hello/client/main.cc b/repos/hello_tutorial/src/hello/client/main.cc
index 55d25e2436..2716fc1f36 100644
--- a/repos/hello_tutorial/src/hello/client/main.cc
+++ b/repos/hello_tutorial/src/hello/client/main.cc
@@ -60,7 +60,7 @@ struct HelloClient {
 		Genode::log("hello test completed.");
 	}
 
-	HelloClient(Genode::Env &env, Hello::Connection &conn) : _env(env), _hello(conn), _a(5), _b(2)
+	HelloClient(Genode::Env &env, Hello::Connection &conn) : _env(env), _a(5), _b(2), _hello(conn)
 	{
 		_config.sigh(_config_handler);
 		_handle_config();
@@ -70,7 +70,8 @@ struct HelloClient {
 void
 Component::construct(Genode::Env &env)
 {
-	Hello::Connection hello(env);
+	Timer::Connection timer(env);
+	Hello::Connection hello(env, (unsigned short)timer.elapsed_ms());
 
 	HelloClient client(env, hello);
 	client.run();
diff --git a/repos/hello_tutorial/src/hello/server/main.cc b/repos/hello_tutorial/src/hello/server/main.cc
index 267a8491b8..7add13c82d 100644
--- a/repos/hello_tutorial/src/hello/server/main.cc
+++ b/repos/hello_tutorial/src/hello/server/main.cc
@@ -18,7 +18,7 @@
 #include <root/component.h>
 #include <hello_session/hello_session.h>
 #include <base/rpc_server.h>
-
+#include <timer_session/connection.h>
 namespace Hello {
 	struct Session_component;
 	struct Root_component;
@@ -28,8 +28,12 @@ namespace Hello {
 
 struct Hello::Session_component : Genode::Rpc_object<Session>
 {
+	unsigned int _id;
+
+	Session_component(unsigned short id) : Genode::Rpc_object<Session>(), _id(id) {}
+	
 	void say_hello() override {
-		Genode::log("I am here... Hello."); }
+		Genode::log("I am here... Hello. My id is ", _id, "."); }
 
 	int add(int a, int b) override {
 		return a + b; }
@@ -41,19 +45,21 @@ class Hello::Root_component
 	public Genode::Root_component<Session_component>
 {
 	protected:
+		Timer::Connection &_timer;
 
 		Session_component *_create_session(const char *) override
 		{
 			Genode::log("creating hello session");
-			return new (md_alloc()) Session_component();
+			return new (md_alloc()) Session_component((unsigned short)_timer.elapsed_ms());
 		}
 
 	public:
 
 		Root_component(Genode::Entrypoint &ep,
-		               Genode::Allocator &alloc)
+		               Genode::Allocator &alloc,
+					   Timer::Connection &timer)
 		:
-			Genode::Root_component<Session_component>(ep, alloc)
+			Genode::Root_component<Session_component>(ep, alloc), _timer(timer)
 		{
 			Genode::log("creating root component");
 		}
@@ -63,6 +69,7 @@ class Hello::Root_component
 struct Hello::Main
 {
 	Genode::Env &env;
+	Timer::Connection _timer { env };
 
 	/*
 	 * A sliced heap is used for allocating session objects - thereby we
@@ -70,7 +77,7 @@ struct Hello::Main
 	 */
 	Genode::Sliced_heap sliced_heap { env.ram(), env.rm() };
 
-	Hello::Root_component root { env.ep(), sliced_heap };
+	Hello::Root_component root { env.ep(), sliced_heap, _timer };
 
 	Main(Genode::Env &env) : env(env)
 	{