Istantiate

Author: axic

bindings/rust/src/lib.rs

@@ -30,11 +30,29 @@ pub fn parse(input: &[u8]) -> Option<Module> {
     Some(Module { ptr: ptr })
 }
 
-pub struct Instance {}
+pub struct Instance {
+    ptr: *mut sys::fizzy_instance,
+}
+
+impl Drop for Instance {
+    fn drop(&mut self) {
+        println!("Dropping instance");
+        assert!(!self.ptr.is_null());
+        unsafe { sys::fizzy_free_instance(self.ptr) }
+    }
+}
 
 impl Module {
     fn instantiate(mut self) -> Option<Instance> {
-        None
+        assert!(!self.ptr.is_null());
+        let module = self.ptr;
+        // Reset pointer to avoid drop to kick in.
+        self.ptr = std::ptr::null_mut();
+        let ptr = unsafe { sys::fizzy_instantiate(module, std::ptr::null_mut(), 0) };
+        if ptr.is_null() {
+            return None;
+        }
+        Some(Instance { ptr: ptr })
     }
 }
 
@@ -60,4 +78,12 @@ mod tests {
         assert!(parse(&[0x00, 0x61, 0x73, 0x6d, 0x01, 0x00, 0x00, 0x00]).is_some());
         assert!(parse(&[0x00, 0x61, 0x73, 0x6d, 0x01, 0x00, 0x00, 0x01]).is_none());
     }
+
+    #[test]
+    fn instantiate_wasm() {
+        let module = parse(&[0x00, 0x61, 0x73, 0x6d, 0x01, 0x00, 0x00, 0x00]);
+        assert!(module.is_some());
+        let instance = module.unwrap().instantiate();
+        assert!(instance.is_some());
+    }
 }