Diff: source/EventQueue/detail/ThunkVTable.h

Revision:

0:ed0152b5c495

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/source/EventQueue/detail/ThunkVTable.h	Mon Sep 19 00:59:11 2016 +0000
@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 2016, ARM Limited, All Rights Reserved
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifndef EVENTQUEUE_DETAIL_THUNKVTABLE_H_
+#define EVENTQUEUE_DETAIL_THUNKVTABLE_H_
+
+namespace eq {
+
+// forward declaration of the Thunk class
+class Thunk;
+
+namespace detail {
+
+/**
+ * This POD is used as a vtable by Thunk implementation.
+ * Thunk is a value type for all type nullary callable and therefore standard
+ * polymorphism is not suitable for that use case.
+ * Instead, the vtable is generated for each type contained in a thunk.
+ * This structure is the prototype of such vtable.
+ * \note see ThunkVTableGenerator for implementation and the generation of
+ * Thunk vtables.
+ */
+struct ThunkVTable {
+	typedef Thunk thunk_t;
+
+	/**
+	 * destroy a thunk (act like a destructor).
+	 */
+	void (* const destroy)(thunk_t& self);
+
+	/**
+	 * Copy self into dest.
+	 * It is expected that dest is empty.
+	 */
+	void (* const copy)(thunk_t& dest, const thunk_t& self);
+
+	/**
+	 * Synthetized call for the inner object of the thunk_t.
+	 */
+	void (* const call)(const thunk_t& self);
+};
+
+} // namespace detail
+} // namespace eq
+
+#endif /* EVENTQUEUE_DETAIL_THUNKVTABLE_H_ */