Debugging: print incomplete tasks

Backends TTs may implement print_incomplete_tasks() to print dangling tasks.
This has proven helpful in debugging flow problems.

Signed-off-by: Joseph Schuchart <joseph.schuchart@stonybrook.edu>

Author: devreal

ttg/ttg/base/tt.h

@@ -232,6 +232,10 @@ namespace ttg {
     /// @return World in which this lives
     virtual ttg::World get_world() const = 0;
 
+    virtual void print_incomplete_tasks() const {
+      throw std::runtime_error("print_incomplete_tasks not implemented!");
+    }
+
     /// Returns a pointer to the i'th input terminal
     ttg::TerminalBase *in(size_t i) {
       if (i >= inputs.size()) throw name + ":TTBase: you are requesting an input terminal that does not exist";

ttg/ttg/parsec/ttg.h

@@ -4158,8 +4158,8 @@ namespace ttg_parsec {
       }
     }
 
-    void print_incomplete_tasks() {
-      parsec_hash_table_for_all(&tasks_table, ht_iter_cb, this);
+    virtual void print_incomplete_tasks() const override {
+      parsec_hash_table_for_all((parsec_hash_table_t*)&tasks_table, ht_iter_cb, (void*)this);
     }
 
     virtual void release() override { do_release(); }

ttg/ttg/tt.h

@@ -103,6 +103,12 @@ namespace ttg {
       for (auto &op : tts) op->make_executable();
     }
 
+    virtual void print_incomplete_tasks() const override {
+      for (auto& tt : tts) {
+        tt->print_incomplete_tasks();
+      }
+    }
+
    private:
     void own_my_tts() const {
       for (auto &op : tts) op->owning_ttg = this;