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