gecko-dev/dom/indexedDB/FileInfo.h

81 строка
2.0 KiB
C++

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 mozilla_dom_indexeddb_fileinfo_h__
#define mozilla_dom_indexeddb_fileinfo_h__
#include "nsISupportsImpl.h"
namespace mozilla {
namespace dom {
namespace indexedDB {
class FileManager;
class FileInfo {
friend class FileManager;
ThreadSafeAutoRefCnt mRefCnt;
ThreadSafeAutoRefCnt mDBRefCnt;
ThreadSafeAutoRefCnt mSliceRefCnt;
RefPtr<FileManager> mFileManager;
public:
class CustomCleanupCallback;
static FileInfo* Create(FileManager* aFileManager, int64_t aId);
explicit FileInfo(FileManager* aFileManager);
void AddRef() { UpdateReferences(mRefCnt, 1); }
void Release(CustomCleanupCallback* aCustomCleanupCallback = nullptr) {
UpdateReferences(mRefCnt, -1, aCustomCleanupCallback);
}
void UpdateDBRefs(int32_t aDelta) { UpdateReferences(mDBRefCnt, aDelta); }
void UpdateSliceRefs(int32_t aDelta) {
UpdateReferences(mSliceRefCnt, aDelta);
}
void GetReferences(int32_t* aRefCnt, int32_t* aDBRefCnt,
int32_t* aSliceRefCnt);
FileManager* Manager() const { return mFileManager; }
virtual int64_t Id() const = 0;
static nsCOMPtr<nsIFile> GetFileForFileInfo(FileInfo* aFileInfo);
protected:
virtual ~FileInfo() = default;
private:
void UpdateReferences(
ThreadSafeAutoRefCnt& aRefCount, int32_t aDelta,
CustomCleanupCallback* aCustomCleanupCallback = nullptr);
bool LockedClearDBRefs();
void Cleanup();
};
class NS_NO_VTABLE FileInfo::CustomCleanupCallback {
public:
virtual nsresult Cleanup(FileManager* aFileManager, int64_t aId) = 0;
protected:
CustomCleanupCallback() = default;
};
} // namespace indexedDB
} // namespace dom
} // namespace mozilla
#endif // mozilla_dom_indexeddb_fileinfo_h__