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