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