Blocks and flowgraph: added this time

oxydsp-flowgraph/src/edge.rs

@@ -0,0 +1,63 @@
+use std::sync::{Arc, Mutex};
+
+use crate::stream::{StreamConsumer, StreamProducer};
+
+pub struct Edge
+{
+    // Represents the index of the block owning the Out end in the graph
+    // And the the output index within that block
+    pub from: Option<BlockIOIndex>,
+
+    // Represents the index of the block owning the In end in the graph
+    // And the the input index within that block
+    pub to: Option<BlockIOIndex>,
+}
+
+#[derive(Clone, Copy, PartialEq, Eq, Debug)]
+pub struct BlockIOIndex
+{
+    pub block_index: usize,
+    pub port_index: usize,
+}
+
+pub struct In<T>
+{
+    stream: Option<StreamProducer<T>>,
+
+    // Will rarely be accessed
+    edge: Arc<Mutex<Edge>>,
+}
+
+pub struct Out<T>
+{
+    stream: Option<StreamConsumer<T>>,
+
+    // Will rarely be accessed
+    edge: Arc<Mutex<Edge>>,
+}
+
+impl<T> In<T>
+{
+    pub fn set_block_index(&self, index: BlockIOIndex)
+    {
+        self.edge.lock().unwrap().to = Some(index);
+    }
+
+    pub fn get_producer_block(&self) -> Option<BlockIOIndex>
+    {
+        self.edge.lock().unwrap().from
+    }
+}
+
+impl<T> Out<T>
+{
+    pub fn set_block_index(&self, index: BlockIOIndex)
+    {
+        self.edge.lock().unwrap().from = Some(index);
+    }
+
+    pub fn get_consumer_block(&self) -> Option<BlockIOIndex>
+    {
+        self.edge.lock().unwrap().to
+    }
+}