80 lines
2.5 KiB
C++
80 lines
2.5 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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/* 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 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, uint32_t 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, uint32_t 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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