82 lines
2.4 KiB
JavaScript
82 lines
2.4 KiB
JavaScript
//---------------------------------------------------------------------------
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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 { Observe, Dataspace, Float } from "@syndicate-lang/core";
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export { PeriodicTick, TimeLaterThan };
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message type PeriodicTick(intervalMS);
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assertion type TimeLaterThan(deadlineMS);
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export function sleep(ms, cb) {
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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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spawn named 'driver-timer/PeriodicTick' {
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during Observe(PeriodicTick($intervalMS)) spawn named ('PeriodicTick('+intervalMS+')') {
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let handle = null;
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let finish = Dataspace.backgroundTask();
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on start {
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handle = setInterval(Dataspace.wrapExternal(() => { send PeriodicTick(intervalMS); }),
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Float.unwrap(intervalMS));
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}
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on stop {
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if (handle) {
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clearInterval(handle);
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handle = null;
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}
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if (finish) {
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finish();
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finish = null;
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}
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}
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}
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}
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spawn named 'driver-timer/TimeLaterThan' {
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during Observe(TimeLaterThan($deadlineMS)) spawn named ('TimeLaterThan('+deadlineMS+')') {
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let handle = null;
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let finish = Dataspace.backgroundTask();
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on start {
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let delta = Float.unwrap(deadlineMS) - (+(new Date()));
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handle = setTimeout(Dataspace.wrapExternal(() => {
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handle = null;
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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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