gecko-dev/dom/indexedDB/IndexedDatabaseManager.h

155 lines
3.8 KiB
C++

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=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_indexeddatabasemanager_h__
#define mozilla_dom_indexeddb_indexeddatabasemanager_h__
#include "mozilla/dom/indexedDB/IndexedDatabase.h"
#include "nsIIndexedDatabaseManager.h"
#include "nsIObserver.h"
#include "mozilla/Mutex.h"
#include "nsClassHashtable.h"
#include "nsHashKeys.h"
#define INDEXEDDB_MANAGER_CONTRACTID "@mozilla.org/dom/indexeddb/manager;1"
class nsIAtom;
class nsPIDOMWindow;
class nsEventChainPostVisitor;
namespace mozilla {
namespace dom {
class TabContext;
}
}
BEGIN_INDEXEDDB_NAMESPACE
class FileManager;
class IndexedDatabaseManager MOZ_FINAL : public nsIIndexedDatabaseManager,
public nsIObserver
{
public:
NS_DECL_ISUPPORTS
NS_DECL_NSIINDEXEDDATABASEMANAGER
NS_DECL_NSIOBSERVER
// Returns a non-owning reference.
static IndexedDatabaseManager*
GetOrCreate();
// Returns a non-owning reference.
static IndexedDatabaseManager*
Get();
// Returns an owning reference! No one should call this but the factory.
static IndexedDatabaseManager*
FactoryCreate();
static bool
IsClosed();
static bool
IsMainProcess()
#ifdef DEBUG
;
#else
{
return sIsMainProcess;
}
#endif
static bool
InLowDiskSpaceMode()
#ifdef DEBUG
;
#else
{
return !!sLowDiskSpaceMode;
}
#endif
already_AddRefed<FileManager>
GetFileManager(const nsACString& aOrigin,
const nsAString& aDatabaseName);
void
AddFileManager(FileManager* aFileManager);
void
InvalidateAllFileManagers();
void
InvalidateFileManagersForPattern(const nsACString& aPattern);
void
InvalidateFileManager(const nsACString& aOrigin,
const nsAString& aDatabaseName);
nsresult
AsyncDeleteFile(FileManager* aFileManager,
int64_t aFileId);
// Don't call this method in real code, it blocks the main thread!
// It is intended to be used by mochitests to test correctness of the special
// reference counting of stored blobs/files.
nsresult
BlockAndGetFileReferences(const nsACString& aOrigin,
const nsAString& aDatabaseName,
int64_t aFileId,
int32_t* aRefCnt,
int32_t* aDBRefCnt,
int32_t* aSliceRefCnt,
bool* aResult);
static mozilla::Mutex&
FileMutex()
{
IndexedDatabaseManager* mgr = Get();
NS_ASSERTION(mgr, "Must have a manager here!");
return mgr->mFileMutex;
}
static nsresult
FireWindowOnError(nsPIDOMWindow* aOwner,
nsEventChainPostVisitor& aVisitor);
static bool
TabContextMayAccessOrigin(const mozilla::dom::TabContext& aContext,
const nsACString& aOrigin);
private:
IndexedDatabaseManager();
~IndexedDatabaseManager();
nsresult
Init();
void
Destroy();
// Maintains a list of all file managers per origin. This list isn't
// protected by any mutex but it is only ever touched on the IO thread.
nsClassHashtable<nsCStringHashKey,
nsTArray<nsRefPtr<FileManager> > > mFileManagers;
// Lock protecting FileManager.mFileInfos and nsDOMFileBase.mFileInfos
// It's s also used to atomically update FileInfo.mRefCnt, FileInfo.mDBRefCnt
// and FileInfo.mSliceRefCnt
mozilla::Mutex mFileMutex;
static bool sIsMainProcess;
static int32_t sLowDiskSpaceMode;
};
END_INDEXEDDB_NAMESPACE
#endif /* mozilla_dom_indexeddb_indexeddatabasemanager_h__ */