Change pointer that's not modified to be const in C API

CHANGELOG.md

@@ -10,6 +10,7 @@ Blocks of changes will separated by version increments.
 
 Special thanks to @jdanford for their contributions!
 
+- [#856](https://github.com/wasmerio/wasmer/pull/856) Expose methods in the runtime C API to get a WASI import object
 - [#850](https://github.com/wasmerio/wasmer/pull/850) New `WasiStateBuilder` API. small, add misc. breaking changes to existing API (for example, changing the preopen dirs arg on `wasi::generate_import_object` from `Vec<String>` to `Vec<Pathbuf>`)
 - [#852](https://github.com/wasmerio/wasmer/pull/852) Make minor grammar/capitalization fixes to README.md
 - [#841](https://github.com/wasmerio/wasmer/pull/841) Slightly improve rustdoc documentation and small updates to outdated info in readme files

lib/runtime-c-api/src/import.rs

@@ -276,7 +276,7 @@ pub unsafe extern "C" fn wasmer_import_object_get_import(
 #[no_mangle]
 pub unsafe extern "C" fn wasmer_import_object_extend(
     import_object: *mut wasmer_import_object_t,
-    imports: *mut wasmer_import_t,
+    imports: *const wasmer_import_t,
     imports_len: c_uint,
 ) -> wasmer_result_t {
     let import_object: &mut ImportObject = &mut *(import_object as *mut ImportObject);

lib/runtime-c-api/wasmer.h

@@ -466,7 +466,7 @@ void wasmer_import_object_destroy(wasmer_import_object_t *import_object);
  * Extends an existing import object with new imports
  */
 wasmer_result_t wasmer_import_object_extend(wasmer_import_object_t *import_object,
-                                            wasmer_import_t *imports,
+                                            const wasmer_import_t *imports,
                                             unsigned int imports_len);
 
 /**

lib/runtime-c-api/wasmer.hh

@@ -368,7 +368,7 @@ void wasmer_import_object_destroy(wasmer_import_object_t *import_object);
 
 /// Extends an existing import object with new imports
 wasmer_result_t wasmer_import_object_extend(wasmer_import_object_t *import_object,
-                                            wasmer_import_t *imports,
+                                            const wasmer_import_t *imports,
                                             unsigned int imports_len);
 
 /// Gets an entry from an ImportObject at the name and namespace.