Ch. 17: diagrams for concurrent and parallel execution

dot/trpl17-01.dot

@@ -0,0 +1,21 @@
+digraph {
+   dpi = 300.0;
+
+   Parallel [label = "Parallel";shape = "plaintext";];
+   rankdir = "TB";
+   splines = false;
+   cluster = true;
+
+   node [shape = diamond;];
+
+   subgraph cluster_ColleagueA {
+      newrank = true;
+      label = "Task 1";
+      A1 -> A2 -> A3 -> A4;
+   }
+
+   subgraph cluster_ColleagueB {
+      label = "Task 2";
+      B1 -> B2 -> B3;
+   }
+}

dot/trpl17-02.dot

@@ -0,0 +1,46 @@
+digraph {
+   dpi = 300.0;
+
+   Concurrent [label = "Concurrent";shape = "plaintext";];
+   rankdir = "TB";
+   splines = false;
+   cluster = true;
+
+   node [shape = diamond;];
+
+   subgraph cluster_task_a {
+      label = "Task A";
+
+      // makes ordering between subgraphs work
+      newrank = true;
+
+      A1;
+      A2;
+      A3;
+      A4;
+
+      // for vertical alignment purposes only
+      A0 [style = invis;];
+
+      edge [style = invis;];
+   }
+
+   subgraph cluster_task_b {
+      label = "Task B";
+      cluster = true;
+
+      // for vertical alignment purposes only
+      newrank = true;
+
+      B0 [style = invis;];
+
+      B1;
+      B2;
+      B3;
+   }
+
+   A1 -> B1 -> A2 -> B2 -> A3 -> A4 -> B3;
+
+   // Makes the heights line up between the boxes.
+   A4 -> A0 [style = invis;];
+}