trace_recorder: adopt Genode::Dictionary

genodelabs/genode#4610

repos/gems/src/app/trace_recorder/backend.h

@@ -14,32 +14,33 @@
 #ifndef _BACKEND_H_
 #define _BACKEND_H_
 
+/* Genode includes */
+#include <util/dictionary.h>
+
 /* local includes */
-#include <named_registry.h>
 #include <writer.h>
 
 namespace Trace_recorder {
 	class Backend_base;
 
-	using Backends     = Named_registry<Backend_base>;
+	using Backend_name = Genode::String<64>;
+	using Backends     = Genode::Dictionary<Backend_base, Backend_name>;
 }
 
 
 class Trace_recorder::Backend_base : Backends::Element
 {
 	protected:
-		friend class Backends::Element;
-		friend class Avl_node<Backend_base>;
-		friend class Avl_tree<Backend_base>;
+		friend class Genode::Dictionary<Backend_base, Backend_name>;
+		friend class Genode::Avl_node<Backend_base>;
+		friend class Genode::Avl_tree<Backend_base>;
 
 	public:
-
-		using Name = Backends::Element::Name;
+		using Name = Backend_name;
 		using Backends::Element::name;
-		using Backends::Element::Element;
 
-		Backend_base(Backends & registry, Name const &name)
-		: Backends::Element(registry, name)
+		Backend_base(Backends & backends, Name const &name)
+		: Backends::Element(backends, name)
 		{ }
 
 		virtual ~Backend_base() { }

repos/gems/src/app/trace_recorder/monitor.cc

@@ -104,11 +104,14 @@ void Trace_recorder::Monitor::start(Xml_node config)
 
 			/* find and assign policy; create/insert if not present */
 			Policy::Name  const policy_name = session_policy.attribute_value("policy", Policy::Name());
-			bool create = true;
-			_policies.apply(policy_name, [&] (Policy & policy) {
-				_trace.trace(id, policy.id(), buffer_sz);
-				create = false;
-			});
+			bool const create =
+				_policies.with_element(policy_name,
+					[&] /* match */ (Policy & policy) {
+						_trace.trace(id, policy.id(), buffer_sz);
+						return false;
+					},
+					[&] /* no_match */ { return true; }
+				);
 
 			/* create policy if it did not exist */
 			if (create) {
@@ -128,14 +131,17 @@ void Trace_recorder::Monitor::start(Xml_node config)
 
 			/* create and register writers at trace buffer */
 			session_policy.for_each_sub_node([&] (Xml_node & node) {
-				bool present = false;
-				_backends.apply(node.type(), [&] (Backend_base &backend) {
-					backend.create_writer(_alloc,
-					                      buffer.writers(),
-					                      _trace_directory->root(),
-					                      _trace_directory->subject_path(buffer.info()));
-					present = true;
-				});
+				bool const present =
+					_backends.with_element(node.type(),
+						[&] /* match */ (Backend_base &backend) {
+							backend.create_writer(_alloc,
+							                      buffer.writers(),
+							                      _trace_directory->root(),
+							                      _trace_directory->subject_path(buffer.info()));
+							return true;
+						},
+						[&] /* no_match */ { return false; }
+					);
 
 				if (!present)
 					error("No writer available for <", node.type(), "/>.");

repos/gems/src/app/trace_recorder/named_registry.h

@@ -1,96 +0,0 @@
-/*
- * \brief  Utility for finding objecs by name
- * \author Norman Feske
- * \date   2021-11-11
- */
-
-/*
- * Copyright (C) 2021 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 _NAMED_REGISTRY_H_
-#define _NAMED_REGISTRY_H_
-
-#include <util/string.h>
-#include <util/avl_tree.h>
-#include <util/noncopyable.h>
-
-namespace Trace_recorder {
-	using namespace Genode;
-
-	template <typename T> class Named_registry;
-}
-
-template <typename T>
-class Trace_recorder::Named_registry : Noncopyable
-{
-	private:
-
-		Avl_tree<T> _tree { };
-
-	public:
-
-		class Element : private Avl_node<T>
-		{
-			public:
-
-				using Name = Genode::String<64>;
-				Name const name;
-
-			private:
-
-				Named_registry<T> &_registry;
-
-				bool higher(T const *other) const { return name > other->name; }
-
-				friend class Avl_tree<T>;
-				friend class Avl_node<T>;
-				friend class Named_registry<T>;
-
-				static T *_matching_sub_tree(T &curr, Name const &name)
-				{
-					typename Avl_node<T>::Side side = (curr.name > name);
-
-					return curr.Avl_node<T>::child(side);
-				}
-
-			public:
-
-				Element(Named_registry &registry, Name const &name)
-				:
-					name(name), _registry(registry)
-				{
-					_registry._tree.insert(this);
-				}
-
-				~Element()
-				{
-					_registry._tree.remove(this);
-				}
-		};
-
-		template <typename FN>
-		void apply(typename Element::Name const &name, FN && fn)
-		{
-			T *curr_ptr = _tree.first();
-			for (;;) {
-				if (!curr_ptr)
-					return;
-
-				if (curr_ptr->name == name) {
-					fn(*curr_ptr);
-					return;
-				}
-
-				curr_ptr = Element::_matching_sub_tree(*curr_ptr, name);
-			}
-		}
-
-		template <typename FN>
-		void for_each(FN && fn) { _tree.for_each(fn); }
-};
-
-#endif /* _NAMED_REGISTRY_H_ */

repos/gems/src/app/trace_recorder/policy.cc

@@ -19,9 +19,9 @@ using namespace Genode;
 Trace_recorder::Policy::Policy(Env                &env,
                                Trace::Connection  &trace,
                                Policy::Name const &name,
-                               Policies           &registry)
+                               Policies           &policies)
 :
-	Policies::Element(registry, name),
+	Policies::Element(policies, name),
 	_env(env), _trace(trace), _rom(env, name.string())
 {
 		Dataspace_capability dst_ds = _trace.policy(_id);

repos/gems/src/app/trace_recorder/policy.h

@@ -14,10 +14,8 @@
 #ifndef _POLICY_H_
 #define _POLICY_H_
 
-/* local includes */
-#include <named_registry.h>
-
 /* Genode includes */
+#include <util/dictionary.h>
 #include <rom_session/connection.h>
 #include <trace_session/connection.h>
 #include <dataspace/client.h>
@@ -25,7 +23,8 @@
 namespace Trace_recorder {
 	class Policy;
 
-	using Policies    = Named_registry<Policy>;
+	using Policy_name = Genode::String<64>;
+	using Policies    = Genode::Dictionary<Policy, Policy_name>;
 }
 
 
@@ -35,7 +34,7 @@ namespace Trace_recorder {
 class Trace_recorder::Policy : Policies::Element
 {
 	private:
-		friend class Policies::Element;
+		friend class Genode::Dictionary<Policy, Policy_name>;
 		friend class Genode::Avl_node<Policy>;
 		friend class Genode::Avl_tree<Policy>;
 
@@ -48,14 +47,13 @@ class Trace_recorder::Policy : Policies::Element
 
 	public:
 
-		using Name = Policies::Element::Name;
+		using Name = Policy_name;
 		using Policies::Element::name;
-		using Policies::Element::Element;
 
 		Policy(Genode::Env               &env,
 		       Genode::Trace::Connection &trace,
 		       Name                const &name,
-		       Policies                  &registry);
+		       Policies                  &policies);
 
 
 		/***************