You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
59 lines
1.3 KiB
59 lines
1.3 KiB
2 years ago
|
'use strict';
|
||
|
|
|
||
|
|
var assert = require('assert');
|
||
|
|
|
||
|
|
var WM = require('es6-weak-map');
|
||
|
|
var hasNativeWeakMap = require('es6-weak-map/is-native-implemented');
|
||
|
|
var defaultResolution = require('default-resolution');
|
||
|
|
|
||
|
|
var runtimes = new WM();
|
||
|
|
|
||
|
|
function isFunction(fn) {
|
||
|
|
return (typeof fn === 'function');
|
||
|
|
}
|
||
|
|
|
||
|
|
function isExtensible(fn) {
|
||
|
|
if (hasNativeWeakMap) {
|
||
|
|
// Native weakmap doesn't care about extensible
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
return Object.isExtensible(fn);
|
||
|
|
}
|
||
|
|
|
||
|
|
function lastRun(fn, timeResolution) {
|
||
|
|
assert(isFunction(fn), 'Only functions can check lastRun');
|
||
|
|
assert(isExtensible(fn), 'Only extensible functions can check lastRun');
|
||
|
|
|
||
|
|
var time = runtimes.get(fn);
|
||
|
|
|
||
|
|
if (time == null) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
var resolution = defaultResolution(timeResolution);
|
||
|
|
|
||
|
|
return time - (time % resolution);
|
||
|
|
}
|
||
|
|
|
||
|
|
function capture(fn, timestamp) {
|
||
|
|
assert(isFunction(fn), 'Only functions can be captured');
|
||
|
|
assert(isExtensible(fn), 'Only extensible functions can be captured');
|
||
|
|
|
||
|
|
timestamp = timestamp || Date.now();
|
||
|
|
|
||
|
|
runtimes.set(fn, timestamp);
|
||
|
|
}
|
||
|
|
|
||
|
|
function release(fn) {
|
||
|
|
assert(isFunction(fn), 'Only functions can be captured');
|
||
|
|
assert(isExtensible(fn), 'Only extensible functions can be captured');
|
||
|
|
|
||
|
|
runtimes.delete(fn);
|
||
|
|
}
|
||
|
|
|
||
|
|
lastRun.capture = capture;
|
||
|
|
lastRun.release = release;
|
||
|
|
|
||
|
|
module.exports = lastRun;
|