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https://github.com/denoland/deno.git
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88 lines
2.4 KiB
Rust
88 lines
2.4 KiB
Rust
// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
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use super::dispatch_json::{Deserialize, Value};
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use crate::state::State;
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use deno_core::BufVec;
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use deno_core::CoreIsolate;
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use deno_core::ErrBox;
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use deno_core::ResourceTable;
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use deno_core::ZeroCopyBuf;
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use futures::future::FutureExt;
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use std::cell::RefCell;
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use std::rc::Rc;
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use std::time::Duration;
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use std::time::Instant;
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pub fn init(i: &mut CoreIsolate, s: &Rc<State>) {
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let t = &CoreIsolate::state(i).borrow().resource_table.clone();
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i.register_op(
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"op_global_timer_stop",
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s.stateful_json_op_sync(t, op_global_timer_stop),
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);
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i.register_op(
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"op_global_timer",
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s.stateful_json_op_async(t, op_global_timer),
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);
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i.register_op("op_now", s.stateful_json_op_sync(t, op_now));
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}
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fn op_global_timer_stop(
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state: &State,
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_resource_table: &mut ResourceTable,
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_args: Value,
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_zero_copy: &mut [ZeroCopyBuf],
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) -> Result<Value, ErrBox> {
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state.global_timer.borrow_mut().cancel();
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Ok(json!({}))
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}
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#[derive(Deserialize)]
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struct GlobalTimerArgs {
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timeout: u64,
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}
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async fn op_global_timer(
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state: Rc<State>,
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_resource_table: Rc<RefCell<ResourceTable>>,
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args: Value,
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_zero_copy: BufVec,
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) -> Result<Value, ErrBox> {
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let args: GlobalTimerArgs = serde_json::from_value(args)?;
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let val = args.timeout;
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let deadline = Instant::now() + Duration::from_millis(val);
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let timer_fut = state
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.global_timer
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.borrow_mut()
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.new_timeout(deadline)
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.boxed_local();
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let _ = timer_fut.await;
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Ok(json!({}))
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}
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// Returns a milliseconds and nanoseconds subsec
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// since the start time of the deno runtime.
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// If the High precision flag is not set, the
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// nanoseconds are rounded on 2ms.
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fn op_now(
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state: &State,
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_resource_table: &mut ResourceTable,
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_args: Value,
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_zero_copy: &mut [ZeroCopyBuf],
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) -> Result<Value, ErrBox> {
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let seconds = state.start_time.elapsed().as_secs();
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let mut subsec_nanos = state.start_time.elapsed().subsec_nanos();
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let reduced_time_precision = 2_000_000; // 2ms in nanoseconds
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// If the permission is not enabled
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// Round the nano result on 2 milliseconds
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// see: https://developer.mozilla.org/en-US/docs/Web/API/DOMHighResTimeStamp#Reduced_time_precision
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if state.check_hrtime().is_err() {
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subsec_nanos -= subsec_nanos % reduced_time_precision;
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}
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Ok(json!({
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"seconds": seconds,
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"subsecNanos": subsec_nanos,
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}))
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}
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