mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-10-31 22:25:30 +00:00
57 lines
1.3 KiB
C++
57 lines
1.3 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* vim: set ts=2 et sw=2 tw=80: */
|
|
/* 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 mozilla_dom_file_asynchelper_h__
|
|
#define mozilla_dom_file_asynchelper_h__
|
|
|
|
#include "FileCommon.h"
|
|
|
|
#include "nsIRequest.h"
|
|
#include "nsIRunnable.h"
|
|
|
|
class nsIRequestObserver;
|
|
|
|
BEGIN_FILE_NAMESPACE
|
|
|
|
/**
|
|
* Must be subclassed. The subclass must implement DoStreamWork.
|
|
* Async operations that are not supported in necko (truncate, flush, etc.)
|
|
* should use this helper. Call AsyncWork to invoke the operation.
|
|
*/
|
|
class AsyncHelper : public nsIRunnable,
|
|
public nsIRequest
|
|
{
|
|
public:
|
|
NS_DECL_THREADSAFE_ISUPPORTS
|
|
NS_DECL_NSIRUNNABLE
|
|
NS_DECL_NSIREQUEST
|
|
|
|
nsresult
|
|
AsyncWork(nsIRequestObserver* aObserver, nsISupports* aCtxt);
|
|
|
|
protected:
|
|
AsyncHelper(nsISupports* aStream)
|
|
: mStream(aStream),
|
|
mStatus(NS_OK)
|
|
{ }
|
|
|
|
virtual ~AsyncHelper()
|
|
{ }
|
|
|
|
virtual nsresult
|
|
DoStreamWork(nsISupports* aStream) = 0;
|
|
|
|
private:
|
|
nsCOMPtr<nsISupports> mStream;
|
|
nsCOMPtr<nsIRequestObserver> mObserver;
|
|
|
|
nsresult mStatus;
|
|
};
|
|
|
|
END_FILE_NAMESPACE
|
|
|
|
#endif // mozilla_dom_file_asynchelper_h__
|