dom/performance/PerformanceMeasure.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #include "PerformanceMeasure.h"
   8 #include "MainThreadUtils.h"
   9 #include "mozilla/dom/PerformanceMeasureBinding.h"
  10
  11 using namespace mozilla::dom;
  12
  13 PerformanceMeasure::PerformanceMeasure(nsISupports* aParent,
  14                                        const nsAString& aName,
  15                                        DOMHighResTimeStamp aStartTime,
  16                                        DOMHighResTimeStamp aEndTime,
  17                                        const JS::Handle<JS::Value>& aDetail)
  18     : PerformanceEntry(aParent, aName, u"measure"_ns),
  19       mStartTime(aStartTime),
  20       mDuration(aEndTime - aStartTime),
  21       mDetail(aDetail) {
  22   mozilla::HoldJSObjects(this);
  23 }
  24
  25 PerformanceMeasure::~PerformanceMeasure() { mozilla::DropJSObjects(this); }
  26
  27 NS_IMPL_CYCLE_COLLECTION_CLASS(PerformanceMeasure)
  28 NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(PerformanceMeasure,
  29                                                 PerformanceEntry)
  30   tmp->mDetail.setUndefined();
  31   mozilla::DropJSObjects(tmp);
  32 NS_IMPL_CYCLE_COLLECTION_UNLINK_END
  33 NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(PerformanceMeasure,
  34                                                   PerformanceEntry)
  35 NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
  36
  37 NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN_INHERITED(PerformanceMeasure,
  38                                                PerformanceEntry)
  39   NS_IMPL_CYCLE_COLLECTION_TRACE_JS_MEMBER_CALLBACK(mDetail)
  40 NS_IMPL_CYCLE_COLLECTION_TRACE_END
  41
  42 NS_IMPL_ISUPPORTS_CYCLE_COLLECTION_INHERITED_0(PerformanceMeasure,
  43                                                PerformanceEntry)
  44
  45 JSObject* PerformanceMeasure::WrapObject(JSContext* aCx,
  46                                          JS::Handle<JSObject*> aGivenProto) {
  47   return PerformanceMeasure_Binding::Wrap(aCx, this, aGivenProto);
  48 }
  49
  50 void PerformanceMeasure::GetDetail(JSContext* aCx,
  51                                    JS::MutableHandle<JS::Value> aRetval) {
  52   // Return a copy so that this method always returns the value it is set to
  53   // (i.e. it'll return the same value even if the caller assigns to it). Note
  54   // that if detail is an object, its contents can be mutated and this is
  55   // expected.
  56   aRetval.set(mDetail);
  57 }
  58
  59 size_t PerformanceMeasure::SizeOfIncludingThis(
  60     mozilla::MallocSizeOf aMallocSizeOf) const {
  61   return aMallocSizeOf(this) + SizeOfExcludingThis(aMallocSizeOf);
  62 }