Give mut access to component params (to take if desired)

Author: alexcrichton

crates/c-api/include/wasmtime/component/linker.h

@@ -127,7 +127,7 @@ WASM_API_EXTERN wasmtime_error_t *wasmtime_component_linker_instance_add_module(
 
 /// Type of the callback used in #wasmtime_component_linker_instance_add_func
 typedef wasmtime_error_t *(*wasmtime_component_func_callback_t)(
-    void *, wasmtime_context_t *, const wasmtime_component_val_t *, size_t,
+    void *, wasmtime_context_t *, wasmtime_component_val_t *, size_t,
     wasmtime_component_val_t *, size_t);
 
 /**

crates/c-api/src/component/linker.rs

@@ -99,7 +99,7 @@ pub unsafe extern "C" fn wasmtime_component_linker_instance_add_module(
 pub type wasmtime_component_func_callback_t = extern "C" fn(
     *mut c_void,
     WasmtimeStoreContextMut<'_>,
-    *const wasmtime_component_val_t,
+    *mut wasmtime_component_val_t,
     usize,
     *mut wasmtime_component_val_t,
     usize,
@@ -126,7 +126,7 @@ pub unsafe extern "C" fn wasmtime_component_linker_instance_add_func(
         .func_new(&name, move |ctx, args, rets| {
             let _ = &foreign;
 
-            let args = args
+            let mut args = args
                 .iter()
                 .map(|x| wasmtime_component_val_t::from(x))
                 .collect::<Vec<_>>();
@@ -136,7 +136,7 @@ pub unsafe extern "C" fn wasmtime_component_linker_instance_add_func(
             let res = callback(
                 foreign.data,
                 ctx,
-                args.as_ptr(),
+                args.as_mut_ptr(),
                 args.len(),
                 c_rets.as_mut_ptr(),
                 c_rets.len(),