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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: */
/* 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 nsDeleteDir_h__
#define nsDeleteDir_h__
#include "nsCOMPtr.h"
#include "nsCOMArray.h"
#include "mozilla/Mutex.h"
#include "mozilla/CondVar.h"
class nsIFile;
class nsISerialEventTarget;
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, uint32_t 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, uint32_t delay);
nsresult RemoveDir(nsIFile* file, bool* stopDeleting);
static nsDeleteDir* gInstance;
mozilla::Mutex mLock;
mozilla::CondVar mCondVar;
bool mNotified;
nsCOMArray<nsITimer> mTimers;
nsCOMPtr<nsISerialEventTarget> mBackgroundET;
bool mShutdownPending;
bool mStopDeleting;
};
#endif // nsDeleteDir_h__
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