58 lines
2.0 KiB
TypeScript
58 lines
2.0 KiB
TypeScript
/// SPDX-License-Identifier: GPL-3.0-or-later
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/// SPDX-FileCopyrightText: Copyright © 2016-2023 Tony Garnock-Jones <tonyg@leastfixedpoint.com>
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import { preserves, Observe, floatValue, Turn, Ref } from "@syndicate-lang/core";
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import { QuasiValue as Q } from "@syndicate-lang/core";
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export message type PeriodicTick(intervalMS);
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export assertion type TimeLaterThan(deadlineMS);
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export function sleep(ds: Ref, ms: number, cb: () => void): void {
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react {
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at ds {
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stop on asserted TimeLaterThan(+(new Date()) + ms) {
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cb();
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}
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}
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}
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}
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export function boot(ds: Ref) {
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spawn named 'timer/PeriodicTick' {
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at ds {
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during Observe({
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"pattern": :pattern PeriodicTick(\Q.lit($intervalMS))
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}) => spawn named (preserves`PeriodicTick(${intervalMS})`) {
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const thisFacet = Turn.activeFacet;
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thisFacet.preventInertCheck();
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const handle = setInterval(() => thisFacet.turn(() => {
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send message PeriodicTick(intervalMS);
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}), floatValue(intervalMS));
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on stop clearInterval(handle);
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}
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}
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}
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spawn named 'timer/TimeLaterThan' {
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at ds {
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during Observe({
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"pattern": :pattern TimeLaterThan(\Q.lit($deadlineMS))
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}) => spawn named (preserves`TimeLaterThan(${deadlineMS})`) {
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const thisFacet = Turn.activeFacet;
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thisFacet.preventInertCheck();
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let delta = floatValue(deadlineMS) - (+(new Date()));
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let handle: any | null = setTimeout(() => thisFacet.turn(() => {
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handle = null;
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react {
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assert TimeLaterThan(deadlineMS);
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}
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}), delta);
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on stop if (handle) {
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clearTimeout(handle);
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handle = null;
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}
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}
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}
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}
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}
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