pjs/netwerk/cache/nsDeleteDir.h

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et cindent: */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is Google Inc.
* Portions created by the Initial Developer are Copyright (C) 2005
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Darin Fisher <darin@meer.net>
* Michal Novotny <michal.novotny@gmail.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifndef nsDeleteDir_h__
#define nsDeleteDir_h__
#include "nsCOMPtr.h"
#include "nsCOMArray.h"
#include "mozilla/Mutex.h"
#include "mozilla/CondVar.h"
class nsIFile;
class nsIThread;
class nsITimer;
class nsDeleteDir {
public:
nsDeleteDir();
~nsDeleteDir();
static nsresult Init();
static nsresult Shutdown(bool finishDeleting);
/**
* This routine attempts to delete a directory that may contain some files
* that are still in use. This latter point is only an issue on Windows and
* a few other systems.
*
* If the moveToTrash parameter is true we first rename the given directory
* "foo.Trash123" (where "foo" is the original directory name, and "123" is
* a random number, in order to support multiple concurrent deletes). The
* directory is then deleted, file-by-file, on a background thread.
*
* If the moveToTrash parameter is false, then the given directory is deleted
* directly.
*
* If 'delay' is non-zero, the directory will not be deleted until the
* specified number of milliseconds have passed. (The directory is still
* renamed immediately if 'moveToTrash' is passed, so upon return it is safe
* to create a directory with the same name).
*/
static nsresult DeleteDir(nsIFile *dir, bool moveToTrash, PRUint32 delay = 0);
/**
* Returns the trash directory corresponding to the given directory.
*/
static nsresult GetTrashDir(nsIFile *dir, nsCOMPtr<nsIFile> *result);
/**
* Remove all trashes left from previous run. This function does nothing when
* called second and more times.
*/
static nsresult RemoveOldTrashes(nsIFile *cacheDir);
static void TimerCallback(nsITimer *aTimer, void *arg);
private:
friend class nsBlockOnBackgroundThreadEvent;
friend class nsDestroyThreadEvent;
nsresult InitThread();
void DestroyThread();
nsresult PostTimer(void *arg, PRUint32 delay);
nsresult RemoveDir(nsIFile *file, bool *stopDeleting);
static nsDeleteDir * gInstance;
mozilla::Mutex mLock;
mozilla::CondVar mCondVar;
nsCOMArray<nsITimer> mTimers;
nsCOMPtr<nsIThread> mThread;
bool mShutdownPending;
bool mStopDeleting;
};
#endif // nsDeleteDir_h__