mirror of
https://github.com/denoland/deno.git
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81 lines
2.2 KiB
Rust
81 lines
2.2 KiB
Rust
// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
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use deno_core::error::AnyError;
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use deno_core::BufVec;
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use deno_core::OpState;
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use deno_core::ZeroCopyBuf;
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use futures::future::FutureExt;
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use serde_derive::Deserialize;
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use serde_json::Value;
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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(rt: &mut deno_core::JsRuntime) {
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super::reg_json_sync(rt, "op_global_timer_stop", op_global_timer_stop);
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super::reg_json_async(rt, "op_global_timer", op_global_timer);
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super::reg_json_sync(rt, "op_now", op_now);
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}
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fn op_global_timer_stop(
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state: &mut OpState,
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_args: Value,
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_zero_copy: &mut [ZeroCopyBuf],
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) -> Result<Value, AnyError> {
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let cli_state = super::cli_state(state);
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cli_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<RefCell<OpState>>,
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args: Value,
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_zero_copy: BufVec,
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) -> Result<Value, AnyError> {
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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 = {
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super::cli_state2(&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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};
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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: &mut OpState,
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_args: Value,
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_zero_copy: &mut [ZeroCopyBuf],
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) -> Result<Value, AnyError> {
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let cli_state = super::cli_state(state);
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let seconds = cli_state.start_time.elapsed().as_secs();
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let mut subsec_nanos = cli_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 cli_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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