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The total size of an IPC inputStream message must be less than 1mb. When we compose the message for the multiplex stream, each sub stream collaborates with its own size, deciding if it's better to be a pipe stream (IPCRemoteStream) or a full serialized one. Differential Revision: https://phabricator.services.mozilla.com/D18543 --HG-- extra : moz-landing-system : lando
92 lines
3.1 KiB
C++
92 lines
3.1 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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 PartiallySeekableInputStream_h
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#define PartiallySeekableInputStream_h
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#include "mozilla/Attributes.h"
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#include "mozilla/Mutex.h"
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#include "nsCOMPtr.h"
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#include "nsIAsyncInputStream.h"
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#include "nsICloneableInputStream.h"
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#include "nsIInputStreamLength.h"
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#include "nsIIPCSerializableInputStream.h"
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#include "nsISeekableStream.h"
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namespace mozilla {
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namespace net {
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// A wrapper for making a stream seekable for the first |aBufferSize| bytes.
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// Note that this object takes the ownership of the underlying stream.
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class PartiallySeekableInputStream final : public nsISeekableStream,
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public nsIAsyncInputStream,
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public nsICloneableInputStream,
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public nsIIPCSerializableInputStream,
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public nsIInputStreamCallback,
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public nsIInputStreamLength,
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public nsIAsyncInputStreamLength,
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public nsIInputStreamLengthCallback {
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public:
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NS_DECL_THREADSAFE_ISUPPORTS
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NS_DECL_NSIINPUTSTREAM
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NS_DECL_NSISEEKABLESTREAM
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NS_DECL_NSITELLABLESTREAM
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NS_DECL_NSIASYNCINPUTSTREAM
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NS_DECL_NSICLONEABLEINPUTSTREAM
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NS_DECL_NSIIPCSERIALIZABLEINPUTSTREAM
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NS_DECL_NSIINPUTSTREAMCALLBACK
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NS_DECL_NSIINPUTSTREAMLENGTH
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NS_DECL_NSIASYNCINPUTSTREAMLENGTH
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NS_DECL_NSIINPUTSTREAMLENGTHCALLBACK
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explicit PartiallySeekableInputStream(
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already_AddRefed<nsIInputStream> aInputStream,
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uint64_t aBufferSize = 4096);
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private:
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PartiallySeekableInputStream(
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already_AddRefed<nsIInputStream> aClonedBaseStream,
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PartiallySeekableInputStream* aClonedFrom);
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~PartiallySeekableInputStream() = default;
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void Init();
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template <typename M>
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void SerializeInternal(mozilla::ipc::InputStreamParams& aParams,
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FileDescriptorArray& aFileDescriptors,
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bool aDelayedStart, uint32_t aMaxSize,
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uint32_t* aSizeUsed, M* aManager);
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nsCOMPtr<nsIInputStream> mInputStream;
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// Raw pointers because these are just QI of mInputStream.
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nsICloneableInputStream* mWeakCloneableInputStream;
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nsIIPCSerializableInputStream* mWeakIPCSerializableInputStream;
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nsIAsyncInputStream* mWeakAsyncInputStream;
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nsIInputStreamLength* mWeakInputStreamLength;
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nsIAsyncInputStreamLength* mWeakAsyncInputStreamLength;
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// Protected by mutex.
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nsCOMPtr<nsIInputStreamCallback> mAsyncWaitCallback;
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// Protected by mutex.
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nsCOMPtr<nsIInputStreamLengthCallback> mAsyncInputStreamLengthCallback;
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nsTArray<char> mCachedBuffer;
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uint64_t mBufferSize;
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uint64_t mPos;
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bool mClosed;
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Mutex mMutex;
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};
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} // namespace net
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} // namespace mozilla
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#endif // PartiallySeekableInputStream_h
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