ng_gateway_driver/
macros.rs

1#[macro_export]
2macro_rules! driver {
3    ($driver:expr) => {
4        #[no_mangle]
5        pub extern "C" fn driver() -> std::sync::Arc<dyn ng_gateway_driver::NGDriver> {
6            let _driver: std::sync::Arc<dyn ng_gateway_driver::NGDriver> = Arc::new($driver);
7            _driver
8        }
9    };
10}
11
12#[macro_export]
13macro_rules! driver_metadata {
14    ($metadata:expr) => {
15        static METADATA_BUFFER: std::sync::Mutex<Option<Vec<u8>>> = Mutex::new(None);
16
17        #[no_mangle]
18        pub extern "C" fn metadata() -> *const u8 {
19            use prost::Message;
20            let _check_metadata_type: node_grove_common_api::ng_proto::DriverMetadata = $metadata;
21
22            let metadata = $metadata;
23            let mut buf = Vec::new();
24            metadata
25                .encode(&mut buf)
26                .expect("Failed to encode Protobuf");
27            let ptr = buf.as_ptr();
28            *METADATA_BUFFER.lock().unwrap() = Some(buf);
29            ptr
30        }
31
32        #[no_mangle]
33        pub extern "C" fn metadata_length() -> usize {
34            METADATA_BUFFER
35                .lock()
36                .unwrap()
37                .as_ref()
38                .map_or(0, |buf| buf.len())
39        }
40
41        #[no_mangle]
42        pub extern "C" fn free_metadata() {
43            *METADATA_BUFFER.lock().unwrap() = None;
44        }
45    };
46}
ng_gateway_driver/macros.rs

ng_gateway_driver/
macros.rs
