only create FlowGraph with Ref

Author: rbran

rust/examples/dwarf/dwarfdump/src/lib.rs

@@ -281,7 +281,7 @@ fn dump_dwarf(bv: &BinaryView) {
         }
     }
 
-    view.show_graph_report("DWARF", graph);
+    view.show_graph_report("DWARF", &graph);
 }
 
 struct DWARFDump;

rust/examples/flowgraph/src/lib.rs

@@ -36,7 +36,7 @@ fn test_graph(view: &BinaryView) {
         &EdgeStyle::default(),
     );
 
-    view.show_graph_report("Rust Graph Title", graph);
+    view.show_graph_report("Rust Graph Title", &graph);
 }
 
 #[no_mangle]

rust/src/binaryview.rs

@@ -1064,7 +1064,7 @@ pub trait BinaryViewExt: BinaryViewBase {
         unsafe { BNApplyDebugInfo(self.as_ref().handle, debug_info.handle) }
     }
 
-    fn show_graph_report<S: BnStrCompatible>(&self, raw_name: S, graph: FlowGraph) {
+    fn show_graph_report<S: BnStrCompatible>(&self, raw_name: S, graph: &FlowGraph) {
         let raw_name = raw_name.into_bytes_with_nul();
         unsafe {
             BNShowGraphReport(

rust/src/flowgraph.rs

@@ -114,8 +114,6 @@ impl<'a> ToOwned for FlowGraphNode<'a> {
     }
 }
 
-// TODO : FlowGraph are RefCounted objects, this needs to be changed to only return Refs to FlowGraph
-
 #[derive(PartialEq, Eq, Hash)]
 pub struct FlowGraph {
     pub(crate) handle: *mut BNFlowGraph,
@@ -126,8 +124,8 @@ impl FlowGraph {
         Self { handle: raw }
     }
 
-    pub fn new() -> Self {
-        unsafe { FlowGraph::from_raw(BNCreateFlowGraph()) }
+    pub fn new() -> Ref<Self> {
+        unsafe { Ref::new(FlowGraph::from_raw(BNCreateFlowGraph())) }
     }
 
     pub fn append(&self, node: &FlowGraphNode) -> usize {