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/* -*- Mode: C++; tab-width: 2; 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 PartiallySeekableInputStream_h
#define PartiallySeekableInputStream_h
#include "mozilla/Attributes.h"
#include "mozilla/Mutex.h"
#include "nsCOMPtr.h"
#include "nsIAsyncInputStream.h"
#include "nsICloneableInputStream.h"
#include "nsIInputStreamLength.h"
#include "nsIIPCSerializableInputStream.h"
#include "nsISeekableStream.h"
namespace mozilla {
namespace net {
// A wrapper for making a stream seekable for the first |aBufferSize| bytes.
// Note that this object takes the ownership of the underlying stream.
class PartiallySeekableInputStream final : public nsISeekableStream,
public nsIAsyncInputStream,
public nsICloneableInputStream,
public nsIIPCSerializableInputStream,
public nsIInputStreamCallback,
public nsIInputStreamLength,
public nsIAsyncInputStreamLength,
public nsIInputStreamLengthCallback {
public:
NS_DECL_THREADSAFE_ISUPPORTS
NS_DECL_NSIINPUTSTREAM
NS_DECL_NSISEEKABLESTREAM
NS_DECL_NSITELLABLESTREAM
NS_DECL_NSIASYNCINPUTSTREAM
NS_DECL_NSICLONEABLEINPUTSTREAM
NS_DECL_NSIIPCSERIALIZABLEINPUTSTREAM
NS_DECL_NSIINPUTSTREAMCALLBACK
NS_DECL_NSIINPUTSTREAMLENGTH
NS_DECL_NSIASYNCINPUTSTREAMLENGTH
NS_DECL_NSIINPUTSTREAMLENGTHCALLBACK
explicit PartiallySeekableInputStream(
already_AddRefed<nsIInputStream> aInputStream,
uint64_t aBufferSize = 4096);
private:
PartiallySeekableInputStream(
already_AddRefed<nsIInputStream> aClonedBaseStream,
PartiallySeekableInputStream* aClonedFrom);
~PartiallySeekableInputStream() = default;
void Init();
template <typename M>
void SerializeInternal(mozilla::ipc::InputStreamParams& aParams,
FileDescriptorArray& aFileDescriptors,
bool aDelayedStart, uint32_t aMaxSize,
uint32_t* aSizeUsed, M* aManager);
nsCOMPtr<nsIInputStream> mInputStream;
// Raw pointers because these are just QI of mInputStream.
nsICloneableInputStream* mWeakCloneableInputStream;
nsIIPCSerializableInputStream* mWeakIPCSerializableInputStream;
nsIAsyncInputStream* mWeakAsyncInputStream;
nsIInputStreamLength* mWeakInputStreamLength;
nsIAsyncInputStreamLength* mWeakAsyncInputStreamLength;
// Protected by mutex.
nsCOMPtr<nsIInputStreamCallback> mAsyncWaitCallback;
// Protected by mutex.
nsCOMPtr<nsIInputStreamLengthCallback> mAsyncInputStreamLengthCallback;
nsTArray<char> mCachedBuffer;
uint64_t mBufferSize;
uint64_t mPos;
bool mClosed;
Mutex mMutex;
};
} // namespace net
} // namespace mozilla
#endif // PartiallySeekableInputStream_h
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