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//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.
'use strict';
const {
MathTrunc,
ObjectCreate,
ObjectDefineProperty,
SymbolToPrimitive
} = primordials;
const {
immediateInfo,
toggleImmediateRef
} = internalBinding('timers');
const L = require('internal/linkedlist');
const {
async_id_symbol,
Timeout,
Immediate,
decRefCount,
immediateInfoFields: {
kCount,
kRefCount
},
kRefed,
kHasPrimitive,
getTimerDuration,
timerListMap,
timerListQueue,
immediateQueue,
active,
unrefActive,
insert
} = require('internal/timers');
const {
promisify: { custom: customPromisify },
deprecate
} = require('internal/util');
let debug = require('internal/util/debuglog').debuglog('timer', (fn) => {
debug = fn;
});
const { validateFunction } = require('internal/validators');
let timersPromises;
const {
destroyHooksExist,
// The needed emit*() functions.
emitDestroy
} = require('internal/async_hooks');
// This stores all the known timer async ids to allow users to clearTimeout and
// clearInterval using those ids, to match the spec and the rest of the web
// platform.
const knownTimersById = ObjectCreate(null);
// Remove a timer. Cancels the timeout and resets the relevant timer properties.
function unenroll(item) {
if (item._destroyed)
return;
item._destroyed = true;
if (item[kHasPrimitive])
delete knownTimersById[item[async_id_symbol]];
// Fewer checks may be possible, but these cover everything.
if (destroyHooksExist() && item[async_id_symbol] !== undefined)
emitDestroy(item[async_id_symbol]);
L.remove(item);
// We only delete refed lists because unrefed ones are incredibly likely
// to come from http and be recreated shortly after.
// TODO: Long-term this could instead be handled by creating an internal
// clearTimeout that makes it clear that the list should not be deleted.
// That function could then be used by http and other similar modules.
if (item[kRefed]) {
// Compliment truncation during insert().
const msecs = MathTrunc(item._idleTimeout);
const list = timerListMap[msecs];
if (list !== undefined && L.isEmpty(list)) {
debug('unenroll: list empty');
timerListQueue.removeAt(list.priorityQueuePosition);
delete timerListMap[list.msecs];
}
decRefCount();
}
// If active is called later, then we want to make sure not to insert again
item._idleTimeout = -1;
}
// Make a regular object able to act as a timer by setting some properties.
// This function does not start the timer, see `active()`.
// Using existing objects as timers slightly reduces object overhead.
function enroll(item, msecs) {
msecs = getTimerDuration(msecs, 'msecs');
// If this item was already in a list somewhere
// then we should unenroll it from that
if (item._idleNext) unenroll(item);
L.init(item);
item._idleTimeout = msecs;
}
/**
* Schedules the execution of a one-time `callback`
* after `after` milliseconds.
* @param {Function} callback
* @param {number} [after]
* @param {any} [arg1]
* @param {any} [arg2]
* @param {any} [arg3]
* @returns {Timeout}
*/
function setTimeout(callback, after, arg1, arg2, arg3) {
validateFunction(callback, 'callback');
let i, args;
switch (arguments.length) {
// fast cases
case 1:
case 2:
break;
case 3:
args = [arg1];
break;
case 4:
args = [arg1, arg2];
break;
default:
args = [arg1, arg2, arg3];
for (i = 5; i < arguments.length; i++) {
// Extend array dynamically, makes .apply run much faster in v6.0.0
args[i - 2] = arguments[i];
}
break;
}
const timeout = new Timeout(callback, after, args, false, true);
insert(timeout, timeout._idleTimeout);
return timeout;
}
ObjectDefineProperty(setTimeout, customPromisify, {
__proto__: null,
enumerable: true,
get() {
if (!timersPromises)
timersPromises = require('timers/promises');
return timersPromises.setTimeout;
}
});
/**
* Cancels a timeout.
* @param {Timeout | string | number} timer
* @returns {void}
*/
function clearTimeout(timer) {
if (timer && timer._onTimeout) {
timer._onTimeout = null;
unenroll(timer);
return;
}
if (typeof timer === 'number' || typeof timer === 'string') {
const timerInstance = knownTimersById[timer];
if (timerInstance !== undefined) {
timerInstance._onTimeout = null;
unenroll(timerInstance);
}
}
}
/**
* Schedules repeated execution of `callback`
* every `repeat` milliseconds.
* @param {Function} callback
* @param {number} [repeat]
* @param {any} [arg1]
* @param {any} [arg2]
* @param {any} [arg3]
* @returns {Timeout}
*/
function setInterval(callback, repeat, arg1, arg2, arg3) {
validateFunction(callback, 'callback');
let i, args;
switch (arguments.length) {
// fast cases
case 1:
case 2:
break;
case 3:
args = [arg1];
break;
case 4:
args = [arg1, arg2];
break;
default:
args = [arg1, arg2, arg3];
for (i = 5; i < arguments.length; i++) {
// Extend array dynamically, makes .apply run much faster in v6.0.0
args[i - 2] = arguments[i];
}
break;
}
const timeout = new Timeout(callback, repeat, args, true, true);
insert(timeout, timeout._idleTimeout);
return timeout;
}
/**
* Cancels an interval.
* @param {Timeout | string | number} timer
* @returns {void}
*/
function clearInterval(timer) {
// clearTimeout and clearInterval can be used to clear timers created from
// both setTimeout and setInterval, as specified by HTML Living Standard:
// https://html.spec.whatwg.org/multipage/timers-and-user-prompts.html#dom-setinterval
clearTimeout(timer);
}
Timeout.prototype.close = function() {
clearTimeout(this);
return this;
};
/**
* Coerces a `Timeout` to a primitive.
* @returns {number}
*/
Timeout.prototype[SymbolToPrimitive] = function() {
const id = this[async_id_symbol];
if (!this[kHasPrimitive]) {
this[kHasPrimitive] = true;
knownTimersById[id] = this;
}
return id;
};
/**
* Schedules the immediate execution of `callback`
* after I/O events' callbacks.
* @param {Function} callback
* @param {any} [arg1]
* @param {any} [arg2]
* @param {any} [arg3]
* @returns {Immediate}
*/
function setImmediate(callback, arg1, arg2, arg3) {
validateFunction(callback, 'callback');
let i, args;
switch (arguments.length) {
// fast cases
case 1:
break;
case 2:
args = [arg1];
break;
case 3:
args = [arg1, arg2];
break;
default:
args = [arg1, arg2, arg3];
for (i = 4; i < arguments.length; i++) {
// Extend array dynamically, makes .apply run much faster in v6.0.0
args[i - 1] = arguments[i];
}
break;
}
return new Immediate(callback, args);
}
ObjectDefineProperty(setImmediate, customPromisify, {
__proto__: null,
enumerable: true,
get() {
if (!timersPromises)
timersPromises = require('timers/promises');
return timersPromises.setImmediate;
}
});
/**
* Cancels an immediate.
* @param {Immediate} immediate
* @returns {void}
*/
function clearImmediate(immediate) {
if (!immediate || immediate._destroyed)
return;
immediateInfo[kCount]--;
immediate._destroyed = true;
if (immediate[kRefed] && --immediateInfo[kRefCount] === 0)
toggleImmediateRef(false);
immediate[kRefed] = null;
if (destroyHooksExist() && immediate[async_id_symbol] !== undefined) {
emitDestroy(immediate[async_id_symbol]);
}
immediate._onImmediate = null;
immediateQueue.remove(immediate);
}
module.exports = {
setTimeout,
clearTimeout,
setImmediate,
clearImmediate,
setInterval,
clearInterval,
_unrefActive: deprecate(
unrefActive,
'timers._unrefActive() is deprecated.' +
' Please use timeout.refresh() instead.',
'DEP0127'),
active: deprecate(
active,
'timers.active() is deprecated. Please use timeout.refresh() instead.',
'DEP0126'),
unenroll: deprecate(
unenroll,
'timers.unenroll() is deprecated. Please use clearTimeout instead.',
'DEP0096'),
enroll: deprecate(
enroll,
'timers.enroll() is deprecated. Please use setTimeout instead.',
'DEP0095')
};
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