gecko-dev/dom/indexedDB/FileInfo.h

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 et sw=2 tw=80: */
/* ***** 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 Indexed Database.
*
* The Initial Developer of the Original Code is
* The Mozilla Foundation.
* Portions created by the Initial Developer are Copyright (C) 2011
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* 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 mozilla_dom_indexeddb_fileinfo_h__
#define mozilla_dom_indexeddb_fileinfo_h__
#include "IndexedDatabase.h"
#include "nsAtomicRefcnt.h"
#include "nsThreadUtils.h"
#include "FileManager.h"
#include "IndexedDatabaseManager.h"
BEGIN_INDEXEDDB_NAMESPACE
class FileInfo
{
friend class FileManager;
public:
FileInfo(FileManager* aFileManager)
: mFileManager(aFileManager)
{ }
virtual ~FileInfo()
{
#ifdef DEBUG
NS_ASSERTION(NS_IsMainThread(), "File info destroyed on wrong thread!");
#endif
}
static
FileInfo* Create(FileManager* aFileManager, PRInt64 aId);
void AddRef()
{
if (IndexedDatabaseManager::IsClosed()) {
NS_AtomicIncrementRefcnt(mRefCnt);
}
else {
UpdateReferences(mRefCnt, 1);
}
}
void Release()
{
if (IndexedDatabaseManager::IsClosed()) {
nsrefcnt count = NS_AtomicDecrementRefcnt(mRefCnt);
if (count == 0) {
mRefCnt = 1;
delete this;
}
}
else {
UpdateReferences(mRefCnt, -1);
}
}
void UpdateDBRefs(PRInt32 aDelta)
{
UpdateReferences(mDBRefCnt, aDelta);
}
void ClearDBRefs()
{
UpdateReferences(mDBRefCnt, 0, true);
}
void UpdateSliceRefs(PRInt32 aDelta)
{
UpdateReferences(mSliceRefCnt, aDelta);
}
void GetReferences(PRInt32* aRefCnt, PRInt32* aDBRefCnt,
PRInt32* aSliceRefCnt);
FileManager* Manager() const
{
return mFileManager;
}
virtual PRInt64 Id() const = 0;
private:
void UpdateReferences(nsAutoRefCnt& aRefCount, PRInt32 aDelta,
bool aClear = false);
void Cleanup();
nsAutoRefCnt mRefCnt;
nsAutoRefCnt mDBRefCnt;
nsAutoRefCnt mSliceRefCnt;
nsRefPtr<FileManager> mFileManager;
};
#define FILEINFO_SUBCLASS(_bits) \
class FileInfo##_bits : public FileInfo \
{ \
public: \
FileInfo##_bits(FileManager* aFileManager, PRInt##_bits aId) \
: FileInfo(aFileManager), mId(aId) \
{ } \
\
virtual PRInt64 Id() const \
{ \
return mId; \
} \
\
private: \
PRInt##_bits mId; \
};
FILEINFO_SUBCLASS(16)
FILEINFO_SUBCLASS(32)
FILEINFO_SUBCLASS(64)
#undef FILEINFO_SUBCLASS
END_INDEXEDDB_NAMESPACE
#endif // mozilla_dom_indexeddb_fileinfo_h__