feat: function blocks have a vtable entry

function blocks now contain an extra entry for the vtable
standard lib functions now account for the exta entry

Author: ghaith

libs/stdlib/src/bistable_functionblocks.rs

@@ -1,6 +1,7 @@
 #[repr(C)]
 #[derive(Debug, Default)]
 pub struct SetResetParams {
+    __vtable: usize,
     set: bool,
     reset: bool,
     output: bool,
@@ -12,6 +13,21 @@ impl SetResetParams {
     }
 }
 
+#[repr(C)]
+pub struct VTable {
+    pub body: extern "C" fn(&mut SetResetParams),
+}
+
+#[allow(non_upper_case_globals)]
+#[no_mangle]
+#[used]
+pub static __vtable_SR: VTable = VTable { body: SR };
+
+#[allow(non_upper_case_globals)]
+#[no_mangle]
+#[used]
+pub static __SR__init: SetResetParams =
+    SetResetParams { __vtable: 0, set: false, reset: false, output: false };
 ///.
 /// Bistable function, set dominant
 ///
@@ -21,6 +37,17 @@ pub extern "C" fn SR(params: &mut SetResetParams) {
     params.set_output(params.set | (!params.reset & params.output));
 }
 
+#[allow(non_upper_case_globals)]
+#[no_mangle]
+#[used]
+pub static __vtable_RS: VTable = VTable { body: RS };
+
+#[allow(non_upper_case_globals)]
+#[no_mangle]
+#[used]
+pub static __RS__init: SetResetParams =
+    SetResetParams { __vtable: 0, set: false, reset: false, output: false };
+
 ///.
 /// Bistable function, reset dominant
 ///