Improve shared rti accesses by replacing mutex with RwLock

- Multiple read accesses without any write access are now possible
  and only one write access is allowed for shared rti variables.

.github/workflows/rust.yml

@@ -26,11 +26,13 @@ jobs:
       - name: Unit tests
         run: cd rust/rti; cargo test
 
-  # fetch-lf:
-  #   uses: chanijjani/lingua-franca/.github/workflows/extract-ref.yml@master
-  #   with:
-  #     file: 'lingua-franca-ref.txt'
+  fetch-rust-rti:    
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v3
 
-  lf-default:
+  lf-rust-rti:
+    needs: fetch-rust-rti
     # TODO(chanijjani): Change the pointer to point to the main lingua-franca repo.
     uses: chanijjani/lingua-franca/.github/workflows/c-tests-with-rust-rti.yml@integration_tests_with_rust_rti

rust/rti/src/federate_info.rs

@@ -61,11 +61,11 @@ impl FederateInfo {
         }
     }
 
-    pub fn e(&self) -> &SchedulingNode {
+    pub fn enclave(&self) -> &SchedulingNode {
         &self.enclave
     }
 
-    pub fn enclave(&mut self) -> &mut SchedulingNode {
+    pub fn enclave_mut(&mut self) -> &mut SchedulingNode {
         &mut self.enclave
     }
 

rust/rti/src/lib.rs

@@ -82,7 +82,7 @@ pub fn process_args(rti: &mut RTIRemote, argv: &[String]) -> Result<(), &'static
                     return Err("Fail to parse a string to i64");
                 }
             };
-            rti.base()
+            rti.base_mut()
                 .set_number_of_scheduling_nodes(num_federates.try_into().unwrap()); // FIXME: panic if the converted value doesn't fit
             println!(
                 "RTI: Number of federates: {}",
@@ -176,13 +176,13 @@ pub fn initialize_federates(rti: &mut RTIRemote) {
         let mut federate = FederateInfo::new();
         // FIXME: Handle "as u16" properly.
         initialize_federate(&mut federate, i as u16);
-        let scheduling_nodes: &mut Vec<FederateInfo> = rti.base().scheduling_nodes();
+        let scheduling_nodes: &mut Vec<FederateInfo> = rti.base_mut().scheduling_nodes_mut();
         scheduling_nodes.insert(i as usize, federate);
     }
 }
 
 fn initialize_federate(fed: &mut FederateInfo, id: u16) {
-    let enclave = fed.enclave();
+    let enclave = fed.enclave_mut();
     enclave.initialize_scheduling_node(id);
     // TODO: fed.set_in_transit_message_tags();
     // TODO: fed.set_server_ip_addr();
@@ -213,5 +213,5 @@ pub fn start_rti_server(_f_rti: &mut RTIRemote) -> Result<Server, Box<dyn Error>
  * Initialize the _RTI instance.
  */
 pub fn initialize_rti() -> RTIRemote {
-    RTIRemote::new()
+    RTIRemote::new(
 }