Add modes.cocci, a Coccinelle script that will help converting old code (with the modes specified in the task) to new code (modes specified in the codelet).

tools/dev/experimental/modes.cocci

@@ -0,0 +1,42 @@
+@find_cl@
+identifier c;
+@@
+struct starpu_codelet c =
+{
+};
+
+@find_task depends on find_cl@
+identifier t;
+identifier find_cl.c;
+@@
+t->cl = &c; 
+
+
+/*
+ * Remove task->buffers[id].mode = STARPU_{R,W,RW}
+ * Replace task->buffers[id].handle = handle; by  
+ *      task->handles[id] = handle;
+ */
+@remove_task_mode depends on find_task@
+identifier find_task.t;
+expression E;
+identifier h;
+expression id; 
+identifier find_cl.c;
+@@
+(
+- t->buffers[id].handle = h;
+|
+- t->buffers[id].mode = E;
+)
+
+@has_modes depends on remove_task_mode@
+identifier find_cl.c;
+expression remove_task_mode.id;
+expression remove_task_mode.E;
+@@
+struct starpu_codelet c =
+{
+++	.modes[id] = E,
+};

tools/dev/experimental/modes_test.c

@@ -0,0 +1,26 @@
+/* Dont change anything ! */
+struct starpu_codelet cummy_cl = 
+{
+        .cpu_funcs = { foo, NULL },
+        .nbuffers = 42
+}
+
+/* Now, there is some work to do */
+struct starpu_codelet cl1 = 
+{
+        .cpu_funcs = { foo, bar, NULL },
+        .nbuffers = 2,
+};
+
+int
+foo(void)
+{
+        struct starpu_task *task;
+        task = starpu_task_create();
+        task->cl = &cl1;
+        task->buffers[0].handle = handle1;
+        task->buffers[0].mode = STARPU_R;
+        task->synchronous = 1;
+        task->buffers[1].handle = handle2;
+        task->buffers[1].mode = STARPU_W;
+}