1/* 2 * Copyright (c) 2023 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16//! #[cxx::bridge] 17#[cxx::bridge] 18mod ffi{ 19 #![allow(dead_code)] 20 #[derive(Clone, Debug, PartialEq, Eq, PartialOrd, Ord)] 21 struct Shared { 22 z: usize, 23 } 24 extern "Rust"{ 25 fn print_message_in_rust(); 26 fn r_return_primitive() -> usize; 27 fn r_return_shared() -> Shared; 28 fn r_return_rust_string() -> String; 29 fn r_return_sum(_: usize, _: usize) -> usize; 30 } 31} 32 33fn print_message_in_rust(){ 34 println!("Here is a test for cpp call Rust."); 35} 36fn r_return_shared() -> ffi::Shared { 37 println!("Here is a message from Rust,test for ffi::Shared:"); 38 ffi::Shared { z: 1996 } 39} 40fn r_return_primitive() -> usize { 41 println!("Here is a message from Rust,test for usize:"); 42 1997 43} 44fn r_return_rust_string() -> String { 45 println!("Here is a message from Rust,test for String"); 46 "Hello World!".to_owned() 47} 48fn r_return_sum(n1: usize, n2: usize) -> usize { 49 println!("Here is a message from Rust,test for {} + {} is:",n1 ,n2); 50 n1 + n2 51} 52