61 lines
2.1 KiB
TypeScript
61 lines
2.1 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, Cap, DoubleFloat, Observe, floatValue, Turn, Schemas } from "@syndicate-lang/core";
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import { QuasiValue as Q } from "@syndicate-lang/core";
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export message type PeriodicTick(interval: DoubleFloat);
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export const LaterThan = Schemas.timer.LaterThan;
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export type LaterThan = Schemas.timer.LaterThan;
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export function sleep(ds: Cap, seconds: number, cb: () => void): void {
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react {
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at ds {
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const deadline = +(new Date()) / 1000.0 + seconds;
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stop on asserted LaterThan(deadline) {
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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: Cap) {
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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($interval: DoubleFloat))
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}) => spawn named (preserves`PeriodicTick(${interval})`) {
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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(interval);
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}), floatValue(interval) * 1000.0);
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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/LaterThan' {
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at ds {
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during Observe({
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"pattern": :pattern LaterThan(\Q.lit($deadline: DoubleFloat))
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}) => spawn named (preserves`LaterThan(${deadline})`) {
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const thisFacet = Turn.activeFacet;
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thisFacet.preventInertCheck();
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let delta = floatValue(deadline) * 1000.0 - (+(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 LaterThan(floatValue(deadline));
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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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