mirror of
https://github.com/classilla/tenfourfox.git
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82 lines
1.8 KiB
C++
82 lines
1.8 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set sw=2 ts=8 et ft=cpp : */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozilla/unused.h"
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#include "nsThreadUtils.h"
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#include "nsCOMPtr.h"
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#include "mozilla/Assertions.h"
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#include "mozilla/ipc/BackgroundChild.h"
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#include "mozilla/ipc/PBackgroundChild.h"
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#include "nsIIPCBackgroundChildCreateCallback.h"
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namespace mozilla {
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namespace camera {
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class WorkerBackgroundChildCallback final :
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public nsIIPCBackgroundChildCreateCallback
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{
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bool* mDone;
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public:
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explicit WorkerBackgroundChildCallback(bool* aDone)
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: mDone(aDone)
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{
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MOZ_ASSERT(!NS_IsMainThread());
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MOZ_ASSERT(mDone);
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}
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NS_DECL_ISUPPORTS
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private:
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~WorkerBackgroundChildCallback() { }
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virtual void
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ActorCreated(PBackgroundChild* aActor) override
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{
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*mDone = true;
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}
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virtual void
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ActorFailed() override
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{
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*mDone = true;
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}
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};
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NS_IMPL_ISUPPORTS(WorkerBackgroundChildCallback, nsIIPCBackgroundChildCreateCallback)
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nsresult
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SynchronouslyCreatePBackground()
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{
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using mozilla::ipc::BackgroundChild;
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MOZ_ASSERT(!BackgroundChild::GetForCurrentThread());
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bool done = false;
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nsCOMPtr<nsIIPCBackgroundChildCreateCallback> callback =
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new WorkerBackgroundChildCallback(&done);
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if (NS_WARN_IF(!BackgroundChild::GetOrCreateForCurrentThread(callback))) {
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return NS_ERROR_FAILURE;
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}
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nsIThread *thread = NS_GetCurrentThread();
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while (!done) {
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if (NS_WARN_IF(!NS_ProcessNextEvent(thread, true /* aMayWait */))) {
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return NS_ERROR_FAILURE;
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}
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}
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if (NS_WARN_IF(!BackgroundChild::GetForCurrentThread())) {
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return NS_ERROR_FAILURE;
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}
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return NS_OK;
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}
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}
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}
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