85 lines
3.2 KiB
TypeScript
85 lines
3.2 KiB
TypeScript
//---------------------------------------------------------------------------
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// @syndicate-lang/driver-timer, a Syndicate driver for time-related events.
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// Copyright (C) 2016-2018 Tony Garnock-Jones <tonyg@leastfixedpoint.com>
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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//---------------------------------------------------------------------------
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import { preserves, Observe, Dataspace, floatValue, Facet } 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<T>(thisFacet: Facet<T>, ms: number, cb: () => void): void {
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react {
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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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boot {
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spawn named 'timer/PeriodicTick' {
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during Observe(PeriodicTick($intervalMS)) =>
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spawn named (preserves`PeriodicTick(${intervalMS})`) {
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let handle: any | null = null;
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let finish: (() => void) | null = thisFacet.actor.dataspace.backgroundTask();
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on start {
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handle = setInterval(thisFacet.wrapExternal((thisFacet) => {
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send message PeriodicTick(intervalMS);
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}), floatValue(intervalMS as any));
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}
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on stop {
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if (handle) {
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clearInterval(handle);
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handle = null;
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}
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if (finish) {
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finish();
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finish = null;
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}
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}
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}
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}
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spawn named 'timer/TimeLaterThan' {
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during Observe(TimeLaterThan($deadlineMS)) =>
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spawn named (preserves`TimeLaterThan(${deadlineMS})`) {
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let handle: any | null = null;
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let finish: (() => void) | null = thisFacet.actor.dataspace.backgroundTask();
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on start {
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let delta = floatValue(deadlineMS as any) - (+(new Date()));
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handle = setTimeout(thisFacet.wrapExternal((thisFacet) => {
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handle = null;
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if (finish) finish();
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finish = 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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}
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on stop {
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if (handle) {
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clearTimeout(handle);
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handle = null;
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}
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if (finish) {
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finish();
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finish = 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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