136 lines
3.3 KiB
C++
136 lines
3.3 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* 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 "nsIInputStream.h"
|
|
#include "nsIObserver.h"
|
|
#include "nsWeakReference.h"
|
|
#include "mozilla/dom/AbortSignal.h"
|
|
#include "mozilla/dom/MutableBlobStorage.h"
|
|
|
|
class nsIThread;
|
|
class nsIInputStreamPump;
|
|
|
|
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 AbortSignal::Follower
|
|
{
|
|
public:
|
|
NS_DECL_THREADSAFE_ISUPPORTS
|
|
NS_DECL_NSIOBSERVER
|
|
|
|
static already_AddRefed<Promise>
|
|
Create(nsIGlobalObject* aGlobal,
|
|
FetchBody<Derived>* aBody,
|
|
AbortSignal* aSignal,
|
|
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;
|
|
}
|
|
|
|
// Override AbortSignal::Follower::Aborted
|
|
void Aborted() override;
|
|
|
|
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
|