forked from mirrors/gecko-dev
118 lines
3 KiB
C++
118 lines
3 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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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
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_dom_FetchConsumer_h
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#define mozilla_dom_FetchConsumer_h
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#include "Fetch.h"
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#include "mozilla/dom/AbortSignal.h"
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#include "mozilla/dom/MutableBlobStorage.h"
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#include "nsIObserver.h"
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#include "nsWeakReference.h"
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class nsIThread;
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namespace mozilla {
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namespace dom {
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class Promise;
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class ThreadSafeWorkerRef;
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template <class Derived> class FetchBody;
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// FetchBody is not thread-safe but we need to move it around threads. In order
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// to keep it alive all the time, we use a ThreadSafeWorkerRef, if created on
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// workers.
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template <class Derived>
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class FetchBodyConsumer final : public nsIObserver
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, public nsSupportsWeakReference
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, public AbortFollower
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{
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public:
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NS_DECL_THREADSAFE_ISUPPORTS
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NS_DECL_NSIOBSERVER
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static already_AddRefed<Promise>
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Create(nsIGlobalObject* aGlobal,
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nsIEventTarget* aMainThreadEventTarget,
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FetchBody<Derived>* aBody,
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AbortSignal* aSignal,
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FetchConsumeType aType,
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ErrorResult& aRv);
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void
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ReleaseObject();
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void
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BeginConsumeBodyMainThread(ThreadSafeWorkerRef* aWorkerRef);
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void
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ContinueConsumeBody(nsresult aStatus, uint32_t aLength, uint8_t* aResult,
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bool aShuttingDown = false);
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void
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ContinueConsumeBlobBody(BlobImpl* aBlobImpl, bool aShuttingDown = false);
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void
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ShutDownMainThreadConsuming();
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void
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NullifyConsumeBodyPump()
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{
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mShuttingDown = true;
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mConsumeBodyPump = nullptr;
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}
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// AbortFollower
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void Abort() override;
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private:
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FetchBodyConsumer(nsIEventTarget* aMainThreadEventTarget,
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nsIGlobalObject* aGlobalObject,
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FetchBody<Derived>* aBody,
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nsIInputStream* aBodyStream,
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Promise* aPromise,
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FetchConsumeType aType);
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~FetchBodyConsumer();
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void
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AssertIsOnTargetThread() const;
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nsCOMPtr<nsIThread> mTargetThread;
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nsCOMPtr<nsIEventTarget> mMainThreadEventTarget;
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#ifdef DEBUG
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// This is used only to check if the body has been correctly consumed.
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RefPtr<FetchBody<Derived>> mBody;
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#endif
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// This is nullified when the consuming of the body starts.
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nsCOMPtr<nsIInputStream> mBodyStream;
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MutableBlobStorage::MutableBlobStorageType mBlobStorageType;
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nsCString mBodyMimeType;
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nsCOMPtr<nsIGlobalObject> mGlobal;
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// Touched on the main-thread only.
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nsCOMPtr<nsIInputStreamPump> mConsumeBodyPump;
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// Only ever set once, always on target thread.
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FetchConsumeType mConsumeType;
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RefPtr<Promise> mConsumePromise;
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// touched only on the target thread.
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bool mBodyConsumed;
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// touched only on the main-thread.
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bool mShuttingDown;
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};
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} // namespace dom
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} // namespace mozilla
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#endif // mozilla_dom_FetchConsumer_h
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