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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /dom/fetch/FetchConsumer.h
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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Add m-esr52 at 52.6.0
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-rw-r--r--dom/fetch/FetchConsumer.h128
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diff --git a/dom/fetch/FetchConsumer.h b/dom/fetch/FetchConsumer.h
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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_dom_FetchConsumer_h
+#define mozilla_dom_FetchConsumer_h
+
+#include "Fetch.h"
+#include "nsIObserver.h"
+#include "nsWeakReference.h"
+#include "mozilla/dom/MutableBlobStorage.h"
+
+class nsIThread;
+
+namespace mozilla {
+namespace dom {
+
+class Promise;
+
+namespace workers {
+class WorkerPrivate;
+class WorkerHolder;
+}
+
+template <class Derived> class FetchBody;
+
+// FetchBody is not thread-safe but we need to move it around threads.
+// In order to keep it alive all the time, we use a WorkerHolder, if created on
+// workers, plus a this consumer.
+template <class Derived>
+class FetchBodyConsumer final : public nsIObserver
+ , public nsSupportsWeakReference
+{
+public:
+ NS_DECL_THREADSAFE_ISUPPORTS
+ NS_DECL_NSIOBSERVER
+
+ static already_AddRefed<Promise>
+ Create(nsIGlobalObject* aGlobal,
+ FetchBody<Derived>* aBody,
+ FetchConsumeType aType,
+ ErrorResult& aRv);
+
+ void
+ ReleaseObject();
+
+ void
+ BeginConsumeBodyMainThread();
+
+ void
+ ContinueConsumeBody(nsresult aStatus, uint32_t aLength, uint8_t* aResult);
+
+ void
+ ContinueConsumeBlobBody(BlobImpl* aBlobImpl);
+
+ void
+ ShutDownMainThreadConsuming();
+
+ workers::WorkerPrivate*
+ GetWorkerPrivate() const
+ {
+ return mWorkerPrivate;
+ }
+
+ void
+ NullifyConsumeBodyPump()
+ {
+ mShuttingDown = true;
+ mConsumeBodyPump = nullptr;
+ }
+
+private:
+ FetchBodyConsumer(nsIGlobalObject* aGlobalObject,
+ workers::WorkerPrivate* aWorkerPrivate,
+ FetchBody<Derived>* aBody,
+ nsIInputStream* aBodyStream,
+ Promise* aPromise,
+ FetchConsumeType aType);
+
+ ~FetchBodyConsumer();
+
+ void
+ AssertIsOnTargetThread() const;
+
+ bool
+ RegisterWorkerHolder();
+
+ nsCOMPtr<nsIThread> mTargetThread;
+
+#ifdef DEBUG
+ // This is used only to check if the body has been correctly consumed.
+ RefPtr<FetchBody<Derived>> mBody;
+#endif
+
+ nsCOMPtr<nsIInputStream> mBodyStream;
+ MutableBlobStorage::MutableBlobStorageType mBlobStorageType;
+ nsCString mBodyMimeType;
+
+ // Set when consuming the body is attempted on a worker.
+ // Unset when consumption is done/aborted.
+ // This WorkerHolder keeps alive the consumer via a cycle.
+ UniquePtr<workers::WorkerHolder> mWorkerHolder;
+
+ nsCOMPtr<nsIGlobalObject> mGlobal;
+
+ // Always set whenever the FetchBodyConsumer is created on the worker thread.
+ workers::WorkerPrivate* mWorkerPrivate;
+
+ // Touched on the main-thread only.
+ nsCOMPtr<nsIInputStreamPump> mConsumeBodyPump;
+
+ // Only ever set once, always on target thread.
+ FetchConsumeType mConsumeType;
+ RefPtr<Promise> mConsumePromise;
+
+ // touched only on the target thread.
+ bool mBodyConsumed;
+
+ // touched only on the main-thread.
+ bool mShuttingDown;
+};
+
+} // namespace dom
+} // namespace mozilla
+
+#endif // mozilla_dom_FetchConsumer_h