dom/base/TestUtils.cpp

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim:set ts=2 sw=2 sts=2 et cindent: */
   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 "mozilla/dom/TestUtils.h"
   8 #include "mozilla/dom/TestUtilsBinding.h"
   9
  10 #include "mozilla/ErrorResult.h"
  11 #include "mozilla/dom/Promise.h"
  12 #include "mozilla/dom/WorkerCommon.h"
  13 #include "mozilla/dom/WorkerPrivate.h"
  14 #include "nsJSEnvironment.h"
  15 #include "xpcpublic.h"
  16
  17 namespace mozilla::dom {
  18
  19 already_AddRefed<Promise> TestUtils::Gc(const GlobalObject& aGlobal,
  20                                         ErrorResult& aRv) {
  21   nsCOMPtr<nsIGlobalObject> global = do_QueryInterface(aGlobal.GetAsSupports());
  22   RefPtr<Promise> promise = Promise::Create(global, aRv);
  23   if (NS_WARN_IF(aRv.Failed())) {
  24     return nullptr;
  25   }
  26
  27   // TODO(krosylight): Ideally we could use nsJSContext::IncrementalGC to make
  28   // it actually async, but that's not required right now.
  29
  30   NS_DispatchToCurrentThread(
  31       NS_NewCancelableRunnableFunction("TestUtils::Gc", [promise] {
  32         if (NS_IsMainThread()) {
  33           nsJSContext::GarbageCollectNow(JS::GCReason::DOM_TESTUTILS,
  34                                          nsJSContext::NonShrinkingGC);
  35           nsJSContext::CycleCollectNow(CCReason::API);
  36         } else {
  37           WorkerPrivate* workerPrivate = GetCurrentThreadWorkerPrivate();
  38           workerPrivate->GarbageCollectInternal(workerPrivate->GetJSContext(),
  39                                                 false /* shrinking */,
  40                                                 false /* collect children */);
  41           workerPrivate->CycleCollectInternal(false);
  42         }
  43
  44         promise->MaybeResolveWithUndefined();
  45       }));
  46
  47   return promise.forget();
  48 }
  49
  50 }  // namespace mozilla::dom