Working base

oxydsp-flowgraph/src/block.rs

@@ -2,7 +2,12 @@ use crate::edge::{AnonymousStreamConsumer, AnonymousStreamProducer, BlockIOIndex
 
 pub enum BlockResult
 {
+    // Signifies that the block can be scheduled again.
     Ok,
+
+    // Signifies that the block finished its work
+    // Running it again would be useless
+    // This triggers the graph shutdown
     Terminated,
 }
 
@@ -28,6 +33,12 @@ pub trait BlockIO
         output_index: usize,
         capacity: usize,
     ) -> (AnonymousStreamProducer, AnonymousStreamConsumer);
+
+    // Meta information
+    fn get_block_name(&self) -> &'static str;
+    fn get_input_names(&self) -> Vec<&'static str>;
+    fn get_output_names(&self) -> Vec<&'static str>;
+    fn get_output_type_names(&self) -> Vec<&'static str>;
 }
 
 pub trait Block
@@ -39,8 +50,11 @@ pub trait SyncBlock
 {
     type Input;
     type Output;
+    type State;
 
-    fn sync_work(&mut self, input: Self::Input) -> Self::Output;
+    fn sync_work(state: &mut Self::State, input: Self::Input) -> Option<Self::Output>;
 }
 
 pub trait GraphableBlock: Block + BlockIO {}
+
+impl<T> GraphableBlock for T where T: Block + BlockIO {}