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'use strict';
const common = require('../common');
const assert = require('assert');
const gcTrackerMap = new WeakMap();
const gcTrackerTag = 'NODE_TEST_COMMON_GC_TRACKER';
function onGC(obj, gcListener) {
const async_hooks = require('async_hooks');
const onGcAsyncHook = async_hooks.createHook({
init: common.mustCallAtLeast(function(id, type) {
if (this.trackedId === undefined) {
assert.strictEqual(type, gcTrackerTag);
this.trackedId = id;
}
}),
destroy(id) {
assert.notStrictEqual(this.trackedId, -1);
if (id === this.trackedId) {
this.gcListener.ongc();
onGcAsyncHook.disable();
}
}
}).enable();
onGcAsyncHook.gcListener = gcListener;
gcTrackerMap.set(obj, new async_hooks.AsyncResource(gcTrackerTag));
obj = null;
}
module.exports = onGC;