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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_RemoteLazyInputStreamChild_h
#define mozilla_RemoteLazyInputStreamChild_h
#include "mozilla/PRemoteLazyInputStreamChild.h"
#include "mozilla/RemoteLazyInputStream.h"
#include "mozilla/Mutex.h"
#include "mozilla/UniquePtr.h"
#include "nsTArray.h"
namespace mozilla {
class RemoteLazyInputStream;
namespace dom {
class ThreadSafeWorkerRef;
}
class RemoteLazyInputStreamChild final : public PRemoteLazyInputStreamChild {
public:
enum ActorState {
// The actor is connected via IPDL to the parent.
eActive,
// The actor is disconnected.
eInactive,
// The actor is waiting to be disconnected. Once it has been disconnected,
// it will be reactivated on the DOM-File thread.
eActiveMigrating,
// The actor has been disconnected and it's waiting to be connected on the
// DOM-File thread.
eInactiveMigrating,
};
NS_INLINE_DECL_THREADSAFE_REFCOUNTING(RemoteLazyInputStreamChild, final)
RemoteLazyInputStreamChild(const nsID& aID, uint64_t aSize);
void ActorDestroy(IProtocol::ActorDestroyReason aReason) override;
ActorState State();
already_AddRefed<RemoteLazyInputStream> CreateStream();
void ForgetStream(RemoteLazyInputStream* aStream);
const nsID& ID() const { return mID; }
uint64_t Size() const { return mSize; }
void StreamNeeded(RemoteLazyInputStream* aStream,
nsIEventTarget* aEventTarget);
mozilla::ipc::IPCResult RecvStreamReady(const Maybe<IPCStream>& aStream);
void LengthNeeded(RemoteLazyInputStream* aStream,
nsIEventTarget* aEventTarget);
mozilla::ipc::IPCResult RecvLengthReady(const int64_t& aLength);
void Shutdown();
void Migrated();
private:
~RemoteLazyInputStreamChild();
// Raw pointers because these streams keep this actor alive. When the last
// stream is unregister, the actor will be deleted. This list is protected by
// mutex.
nsTArray<RemoteLazyInputStream*> mStreams;
// This mutex protects mStreams because that can be touched in any thread.
Mutex mMutex;
const nsID mID;
const uint64_t mSize;
ActorState mState;
// This struct and the array are used for creating streams when needed.
struct PendingOperation {
RefPtr<RemoteLazyInputStream> mStream;
nsCOMPtr<nsIEventTarget> mEventTarget;
enum {
eStreamNeeded,
eLengthNeeded,
} mOp;
};
nsTArray<PendingOperation> mPendingOperations;
nsCOMPtr<nsISerialEventTarget> mOwningEventTarget;
RefPtr<dom::ThreadSafeWorkerRef> mWorkerRef;
};
} // namespace mozilla
#endif // mozilla_RemoteLazyInputStreamChild_h
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