mirror of
https://github.com/denoland/deno.git
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82 lines
2.3 KiB
Rust
82 lines
2.3 KiB
Rust
// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
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use super::dispatch_json::{Deserialize, JsonOp, Value};
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use crate::ops::json_op;
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use crate::state::ThreadSafeState;
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use deno_core::*;
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use futures::future::FutureExt;
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use std;
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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 Isolate, s: &ThreadSafeState) {
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i.register_op(
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"global_timer_stop",
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s.core_op(json_op(s.stateful_op(op_global_timer_stop))),
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);
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i.register_op(
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"global_timer",
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s.core_op(json_op(s.stateful_op(op_global_timer))),
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);
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i.register_op("now", s.core_op(json_op(s.stateful_op(op_now))));
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}
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fn op_global_timer_stop(
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state: &ThreadSafeState,
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_args: Value,
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_zero_copy: Option<PinnedBuf>,
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) -> Result<JsonOp, ErrBox> {
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let state = state;
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let mut t = state.global_timer.lock().unwrap();
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t.cancel();
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Ok(JsonOp::Sync(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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fn op_global_timer(
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state: &ThreadSafeState,
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args: Value,
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_zero_copy: Option<PinnedBuf>,
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) -> Result<JsonOp, 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 state = state;
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let mut t = state.global_timer.lock().unwrap();
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let deadline = Instant::now() + Duration::from_millis(val);
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let f = t
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.new_timeout(deadline)
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.then(move |_| futures::future::ok(json!({})));
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Ok(JsonOp::Async(f.boxed()))
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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: &ThreadSafeState,
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_args: Value,
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_zero_copy: Option<PinnedBuf>,
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) -> Result<JsonOp, 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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let permissions = state.permissions.lock().unwrap();
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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 !permissions.allow_hrtime.is_allow() {
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subsec_nanos -= subsec_nanos % reduced_time_precision
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}
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Ok(JsonOp::Sync(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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