mirror of
https://github.com/mozilla/gecko-dev.git
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86 lines
3.0 KiB
C++
86 lines
3.0 KiB
C++
/* -*- Mode: C++; tab-width: 4; 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 NonBlockingAsyncInputStream_h
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#define NonBlockingAsyncInputStream_h
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#include "mozilla/Attributes.h"
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#include "mozilla/Maybe.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 "nsIIPCSerializableInputStream.h"
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#include "nsISeekableStream.h"
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// This class aims to wrap a non-blocking and non-async inputStream and expose
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// it as nsIAsyncInputStream.
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// Probably you don't want to use this class directly. Instead use
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// NS_MakeAsyncNonBlockingInputStream() as it will handle different stream
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// variants without requiring you to special-case them yourself.
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namespace mozilla {
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class NonBlockingAsyncInputStream final : public nsIAsyncInputStream,
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public nsICloneableInputStream,
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public nsIIPCSerializableInputStream,
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public nsISeekableStream {
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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_NSIASYNCINPUTSTREAM
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NS_DECL_NSICLONEABLEINPUTSTREAM
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NS_DECL_NSIIPCSERIALIZABLEINPUTSTREAM
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NS_DECL_NSISEEKABLESTREAM
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NS_DECL_NSITELLABLESTREAM
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// |aInputStream| must be a non-blocking, non-async inputSteam.
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static nsresult Create(already_AddRefed<nsIInputStream> aInputStream,
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nsIAsyncInputStream** aAsyncInputStream);
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private:
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explicit NonBlockingAsyncInputStream(
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already_AddRefed<nsIInputStream> aInputStream);
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~NonBlockingAsyncInputStream();
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class AsyncWaitRunnable;
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void RunAsyncWaitCallback(AsyncWaitRunnable* aRunnable,
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already_AddRefed<nsIInputStreamCallback> aCallback);
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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* MOZ_NON_OWNING_REF mWeakCloneableInputStream;
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nsIIPCSerializableInputStream* MOZ_NON_OWNING_REF
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mWeakIPCSerializableInputStream;
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nsISeekableStream* MOZ_NON_OWNING_REF mWeakSeekableInputStream;
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nsITellableStream* MOZ_NON_OWNING_REF mWeakTellableInputStream;
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Mutex mLock;
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struct WaitClosureOnly {
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WaitClosureOnly(AsyncWaitRunnable* aRunnable, nsIEventTarget* aEventTarget);
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RefPtr<AsyncWaitRunnable> mRunnable;
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nsCOMPtr<nsIEventTarget> mEventTarget;
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};
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// This is set when AsyncWait is called with a callback and with
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// WAIT_CLOSURE_ONLY as flag.
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// This is protected by mLock.
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Maybe<WaitClosureOnly> mWaitClosureOnly MOZ_GUARDED_BY(mLock);
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// This is protected by mLock.
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RefPtr<AsyncWaitRunnable> mAsyncWaitCallback MOZ_GUARDED_BY(mLock);
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// This is protected by mLock.
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bool mClosed MOZ_GUARDED_BY(mLock);
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};
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} // namespace mozilla
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#endif // NonBlockingAsyncInputStream_h
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