Function deno_core::op_sync [−][src]
pub fn op_sync<F, A, B, R>(op_fn: F) -> Box<OpFn> where
F: Fn(&mut OpState, A, B) -> Result<R, AnyError> + 'static,
A: DeserializeOwned,
B: DeserializeOwned,
R: Serialize + 'static,
Expand description
Creates an op that passes data synchronously using JSON.
The provided function op_fn
has the following parameters:
&mut OpState
: the op state, can be used to read/write resources in the runtime from an op.V
: the deserializable value that is passed to the Rust function.&mut [ZeroCopyBuf]
: raw bytes passed along, usually not needed if the JSON value is used.
op_fn
returns a serializable value, which is directly returned to JavaScript.
When registering an op like this…
ⓘ
let mut runtime = JsRuntime::new(...); runtime.register_op("hello", deno_core::op_sync(Self::hello_op)); runtime.sync_ops_cache();
…it can be invoked from JS using the provided name, for example:
let result = Deno.core.opSync("function_name", args);
runtime.sync_ops_cache()
must be called after registering new ops
A more complete example is available in the examples directory.