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112 lines
2.7 KiB
Rust
112 lines
2.7 KiB
Rust
// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
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use super::dispatch_json::{JsonOp, Value};
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use crate::ops::json_op;
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use crate::state::State;
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use crate::web_worker::WebWorkerHandle;
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use crate::worker::WorkerEvent;
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use deno_core::CoreIsolate;
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use deno_core::CoreIsolateState;
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use deno_core::ErrBox;
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use deno_core::ZeroCopyBuf;
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use futures::channel::mpsc;
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use std::convert::From;
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use std::rc::Rc;
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pub fn web_worker_op<D>(
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sender: mpsc::Sender<WorkerEvent>,
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dispatcher: D,
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) -> impl Fn(
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&mut CoreIsolateState,
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Value,
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&mut [ZeroCopyBuf],
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) -> Result<JsonOp, ErrBox>
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where
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D: Fn(
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&mpsc::Sender<WorkerEvent>,
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Value,
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&mut [ZeroCopyBuf],
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) -> Result<JsonOp, ErrBox>,
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{
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move |_isolate_state: &mut CoreIsolateState,
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args: Value,
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zero_copy: &mut [ZeroCopyBuf]|
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-> Result<JsonOp, ErrBox> { dispatcher(&sender, args, zero_copy) }
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}
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pub fn web_worker_op2<D>(
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handle: WebWorkerHandle,
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sender: mpsc::Sender<WorkerEvent>,
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dispatcher: D,
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) -> impl Fn(
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&mut CoreIsolateState,
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Value,
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&mut [ZeroCopyBuf],
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) -> Result<JsonOp, ErrBox>
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where
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D: Fn(
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WebWorkerHandle,
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&mpsc::Sender<WorkerEvent>,
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Value,
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&mut [ZeroCopyBuf],
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) -> Result<JsonOp, ErrBox>,
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{
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move |_isolate_state: &mut CoreIsolateState,
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args: Value,
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zero_copy: &mut [ZeroCopyBuf]|
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-> Result<JsonOp, ErrBox> {
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dispatcher(handle.clone(), &sender, args, zero_copy)
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}
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}
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pub fn init(
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i: &mut CoreIsolate,
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s: &Rc<State>,
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sender: &mpsc::Sender<WorkerEvent>,
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handle: WebWorkerHandle,
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) {
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i.register_op(
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"op_worker_post_message",
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s.core_op(json_op(web_worker_op(
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sender.clone(),
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op_worker_post_message,
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))),
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);
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i.register_op(
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"op_worker_close",
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s.core_op(json_op(web_worker_op2(
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handle,
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sender.clone(),
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op_worker_close,
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))),
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);
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}
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/// Post message to host as guest worker
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fn op_worker_post_message(
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sender: &mpsc::Sender<WorkerEvent>,
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_args: Value,
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data: &mut [ZeroCopyBuf],
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) -> Result<JsonOp, ErrBox> {
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assert_eq!(data.len(), 1, "Invalid number of arguments");
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let d = Vec::from(&*data[0]).into_boxed_slice();
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let mut sender = sender.clone();
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sender
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.try_send(WorkerEvent::Message(d))
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.expect("Failed to post message to host");
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Ok(JsonOp::Sync(json!({})))
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}
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/// Notify host that guest worker closes
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fn op_worker_close(
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handle: WebWorkerHandle,
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sender: &mpsc::Sender<WorkerEvent>,
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_args: Value,
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_data: &mut [ZeroCopyBuf],
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) -> Result<JsonOp, ErrBox> {
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let mut sender = sender.clone();
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// Notify parent that we're finished
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sender.close_channel();
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// Terminate execution of current worker
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handle.terminate();
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Ok(JsonOp::Sync(json!({})))
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}
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