Changes between Initial Version and Version 1 of DsxDrivers

Timestamp:

Aug 30, 2006, 3:47:15 PM (19 years ago)

Author:

Nicolas Pouillon

Comment:

--

DsxDrivers

@@ +1 @@
+= What is it ? =
+
+A Driver is something taking a [wiki:DsxWare Ware] and makeing somthing useful with it (typically generating source).
+
+A Driver may be helped by [wiki:NodeDriver NodeDrivers], thus having a decentralized generation of products.
+
+= Services =
+
+Through class (ie even with no instance):
+ * Keeps a list of known [wiki:NodeDriver NodeDrivers] and the associated [wiki:Node node] types. (see #Registering)
+Through instances:
+ * Has some parameters (output directory, optional featues, ...) chosen at instanciation
+ * Keeps silent until code generation is asked (it may never be asked)
+
+This way, we may generate with the same driver class (eg generate SystemC/Caba code) different [wiki:DsxWare Wares], with different options; or the other way around, generate the same [wiki:DsxWare Wares] many times through different backends.
+
+= Registering =
+
+With method `register()` a NodeDriver can register as a generation class for a [wiki:Node Node].
+API between a Driver and its associated NodeDrivers is ad-hoc: the Driver's needs and design rules.
+
+A base NodeDriver valid for a given Driver should be given, with basic functionalities, doing a no-op for the code.
+
+= Registration usage =
+
+Let's have the following class hierarchies:
+
+{{{
+Node
+  MyWareTypeNode
+    MyWareWidgetNode
+    MyWareThingieNode
+    MyWareOtherNode
+}}}
+
+Let's have the following drivers:
+
+{{{
+NodeDriver
+  MyDriverNoopDriver
+    MyWareWidgetNodeDriver
+    MyWareOtherNodeDriver
+}}}
+
+Now, if we register in our new driver called `MyDriver`:
+{{{
+# default registration
+MyDriver.register(MyWareTypeNode, MyWareWidgetNoopDriver)
+
+# specialized drivers
+MyDriver.register(MyWareWidgetNode, MyWareWidgetNodeDriver)
+MyDriver.register(MyWareOtherNode, MyWareOtherNodeDriver)
+}}}
+
+`MyWareThingieNode` will be driven by `MyWareWidgetNoopDriver`.
+
+This kind of walk through inherances also works with more childs and classes