зеркало из https://github.com/mozilla/gecko-dev.git
72 строки
2.1 KiB
C++
72 строки
2.1 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_IPCBlobInputStreamStorage_h
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#define mozilla_dom_IPCBlobInputStreamStorage_h
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#include "mozilla/RefPtr.h"
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#include "nsClassHashtable.h"
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#include "nsIObserver.h"
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class nsIInputStream;
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struct nsID;
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namespace mozilla {
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namespace dom {
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class IPCBlobInputStreamParentCallback;
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class IPCBlobInputStreamStorage final : public nsIObserver {
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public:
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NS_DECL_THREADSAFE_ISUPPORTS
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NS_DECL_NSIOBSERVER
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// This initializes the singleton and it must be called on the main-thread.
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static void Initialize();
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static IPCBlobInputStreamStorage* Get();
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void AddStream(nsIInputStream* aInputStream, const nsID& aID, uint64_t aSize,
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uint64_t aChildID);
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// Removes and returns the stream corresponding to the nsID. May return a
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// nullptr if there's no stream stored for the nsID.
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nsCOMPtr<nsIInputStream> ForgetStream(const nsID& aID);
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bool HasStream(const nsID& aID);
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void GetStream(const nsID& aID, uint64_t aStart, uint64_t aLength,
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nsIInputStream** aInputStream);
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void StoreCallback(const nsID& aID,
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IPCBlobInputStreamParentCallback* aCallback);
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already_AddRefed<IPCBlobInputStreamParentCallback> TakeCallback(
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const nsID& aID);
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private:
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IPCBlobInputStreamStorage() = default;
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~IPCBlobInputStreamStorage() = default;
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struct StreamData {
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nsCOMPtr<nsIInputStream> mInputStream;
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RefPtr<IPCBlobInputStreamParentCallback> mCallback;
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// This is the Process ID connected with this inputStream. We need to store
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// this information in order to delete it if the child crashes/shutdowns.
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uint64_t mChildID;
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uint64_t mSize;
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};
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nsClassHashtable<nsIDHashKey, StreamData> mStorage;
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};
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} // namespace dom
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} // namespace mozilla
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#endif // mozilla_dom_IPCBlobInputStreamStorage_h
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