tor-browser

The Tor Browser
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ExecuteIfOnMainThreadEventTarget.cpp (2157B)

      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 "ExecuteIfOnMainThreadEventTarget.h"
      8 #include "mozilla/ClearOnShutdown.h"
      9 
     10 namespace mozilla::net {
     11 
     12 NS_IMPL_ISUPPORTS(ExecuteIfOnMainThreadEventTarget, nsIEventTarget,
     13                  nsISerialEventTarget)
     14 
     15 NS_IMETHODIMP
     16 ExecuteIfOnMainThreadEventTarget::Dispatch(
     17    already_AddRefed<nsIRunnable> aRunnable, DispatchFlags aFlags) {
     18  if (NS_IsMainThread()) {
     19    nsCOMPtr<nsIRunnable> runnable(aRunnable);
     20    return runnable->Run();
     21  }
     22  return GetMainThreadSerialEventTarget()->Dispatch(std::move(aRunnable),
     23                                                    aFlags);
     24 }
     25 
     26 NS_IMETHODIMP
     27 ExecuteIfOnMainThreadEventTarget::DispatchFromScript(nsIRunnable* aRunnable,
     28                                                     DispatchFlags aFlags) {
     29  return Dispatch(do_AddRef(aRunnable), aFlags);
     30 }
     31 
     32 NS_IMETHODIMP
     33 ExecuteIfOnMainThreadEventTarget::DelayedDispatch(already_AddRefed<nsIRunnable>,
     34                                                  uint32_t) {
     35  return NS_ERROR_NOT_IMPLEMENTED;
     36 }
     37 
     38 NS_IMETHODIMP
     39 ExecuteIfOnMainThreadEventTarget::RegisterShutdownTask(nsITargetShutdownTask*) {
     40  return NS_ERROR_NOT_IMPLEMENTED;
     41 }
     42 
     43 NS_IMETHODIMP
     44 ExecuteIfOnMainThreadEventTarget::UnregisterShutdownTask(
     45    nsITargetShutdownTask*) {
     46  return NS_ERROR_NOT_IMPLEMENTED;
     47 }
     48 
     49 NS_IMETHODIMP
     50 ExecuteIfOnMainThreadEventTarget::IsOnCurrentThread(bool* aIsOnCurrentThread) {
     51  *aIsOnCurrentThread = NS_IsMainThread();
     52  return NS_OK;
     53 }
     54 
     55 NS_IMETHODIMP_(bool)
     56 ExecuteIfOnMainThreadEventTarget::IsOnCurrentThreadInfallible() {
     57  return NS_IsMainThread();
     58 }
     59 
     60 nsISerialEventTarget* ExecuteIfOnMainThreadEventTarget::Get() {
     61  static nsCOMPtr<nsISerialEventTarget> sTarget;
     62  if (!sTarget) {
     63    sTarget = new ExecuteIfOnMainThreadEventTarget();
     64    ClearOnShutdown(&sTarget);
     65  }
     66 
     67  return sTarget.get();
     68 }
     69 
     70 }  // namespace mozilla::net