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db595b2de6
I introduced this module over a year ago in a pull request as the v8 module but it was quickly subsumed by the tracing module. The tracing module was recently removed again and that is why this commit introduces the v8 module again, including the new features it picked up commitsd23ac0eandf8076c4. PR-URL: https://github.com/iojs/io.js/pull/131 Reviewed-By: Chris Dickinson <christopher.s.dickinson@gmail.com> Reviewed-By: Christian Tellnes <christian@tellnes.no> Reviewed-By: Thorsten Lorenz <thlorenz@gmx.de> Reviewed-By: Trevor Norris <trev.norris@gmail.com>
42 lines
1.4 KiB
JavaScript
42 lines
1.4 KiB
JavaScript
// Copyright (c) 2014, StrongLoop Inc.
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice appear in all copies.
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//
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// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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'use strict';
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var EventEmitter = require('events');
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var v8binding = process.binding('v8');
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var v8 = module.exports = new EventEmitter();
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v8.getHeapStatistics = v8binding.getHeapStatistics;
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v8.setFlagsFromString = v8binding.setFlagsFromString;
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function emitGC(before, after) {
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v8.emit('gc', before, after);
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}
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v8.on('newListener', function(name) {
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if (name === 'gc' && EventEmitter.listenerCount(this, name) === 0) {
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v8binding.startGarbageCollectionTracking(emitGC);
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}
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});
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v8.on('removeListener', function(name) {
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if (name === 'gc' && EventEmitter.listenerCount(this, name) === 0) {
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v8binding.stopGarbageCollectionTracking();
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}
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});
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