Pass `SendOutput` by reference

apis/c/operator/operator_types.h

@@ -139,7 +139,7 @@ typedef struct SendOutput {
 /** <No documentation available> */
 typedef struct DoraOnInput {
     /** <No documentation available> */
-    OnInputResult_t (*on_input)(Input_t const *, SendOutput_t, void *);
+    OnInputResult_t (*on_input)(Input_t const *, SendOutput_t const *, void *);
 } DoraOnInput_t;
 
 

apis/rust/operator/macros/src/lib.rs

@@ -53,7 +53,7 @@ fn register_operator_impl(item: &TokenStream2) -> syn::Result<TokenStream2> {
         #[no_mangle]
         pub unsafe extern "C" fn dora_on_input(
             input: &dora_operator_api::types::Input,
-            send_output: dora_operator_api::types::SendOutput,
+            send_output: &dora_operator_api::types::SendOutput,
             operator_context: *mut std::ffi::c_void,
         ) -> dora_operator_api::types::OnInputResult {
             dora_operator_api::raw::dora_on_input::<#operator_ty>(

apis/rust/operator/src/lib.rs

@@ -18,9 +18,9 @@ pub trait DoraOperator: Default {
     ) -> Result<DoraStatus, String>;
 }
 
-pub struct DoraOutputSender(SendOutput);
+pub struct DoraOutputSender<'a>(&'a SendOutput);
 
-impl DoraOutputSender {
+impl DoraOutputSender<'_> {
     pub fn send(&mut self, id: String, data: Vec<u8>) -> Result<(), String> {
         let result = self.0.send_output.call(Output {
             id: id.into(),

apis/rust/operator/src/raw.rs

@@ -28,7 +28,7 @@ pub unsafe fn dora_drop_operator<O>(operator_context: *mut c_void) -> DoraResult
 
 pub unsafe fn dora_on_input<O: DoraOperator>(
     input: &Input,
-    send_output: SendOutput,
+    send_output: &SendOutput,
     operator_context: *mut std::ffi::c_void,
 ) -> OnInputResult {
     let mut output_sender = DoraOutputSender(send_output);

apis/rust/operator/types/src/lib.rs

@@ -47,7 +47,7 @@ pub struct DoraOnInput {
 pub struct OnInputFn(
     pub  unsafe extern "C" fn(
         input: &Input,
-        send_output: SendOutput,
+        send_output: &SendOutput,
         operator_context: *mut std::ffi::c_void,
     ) -> OnInputResult,
 );

binaries/runtime/src/operator/shared_lib.rs

@@ -110,7 +110,7 @@ impl<'lib> SharedLibraryOperator<'lib> {
             } = unsafe {
                 (self.bindings.on_input.on_input)(
                     &operator_input,
-                    send_output,
+                    &send_output,
                     operator_context.raw,
                 )
             };