gecko/dom/indexedDB/DatabaseInfo.cpp

312 lines
7.5 KiB
C++

/* -*- 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) 2010
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Ben Turner <bent.mozilla@gmail.com>
*
* 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 ***** */
#include "DatabaseInfo.h"
#include "nsClassHashtable.h"
#include "nsHashKeys.h"
#include "nsThreadUtils.h"
USING_INDEXEDDB_NAMESPACE
namespace {
typedef nsClassHashtable<nsStringHashKey, ObjectStoreInfo>
ObjectStoreInfoHash;
struct DatabaseInfoHash
{
DatabaseInfoHash(DatabaseInfo* aInfo) {
NS_ASSERTION(aInfo, "Null pointer!");
info = aInfo;
}
nsAutoPtr<DatabaseInfo> info;
nsAutoPtr<ObjectStoreInfoHash> objectStoreHash;
};
typedef nsClassHashtable<nsUint32HashKey, DatabaseInfoHash>
DatabaseHash;
DatabaseHash* gDatabaseHash = nsnull;
PLDHashOperator
EnumerateObjectStoreNames(const nsAString& aKey,
ObjectStoreInfo* aData,
void* aUserArg)
{
nsTArray<nsString>* array = static_cast<nsTArray<nsString>*>(aUserArg);
if (!array->AppendElement(aData->name)) {
NS_ERROR("Out of memory?");
return PL_DHASH_STOP;
}
return PL_DHASH_NEXT;
}
}
#ifdef NS_BUILD_REFCNT_LOGGING
DatabaseInfo::DatabaseInfo()
: id(0),
nextObjectStoreId(1),
nextIndexId(1)
{
MOZ_COUNT_CTOR(DatabaseInfo);
}
DatabaseInfo::~DatabaseInfo()
{
MOZ_COUNT_DTOR(DatabaseInfo);
}
IndexInfo::IndexInfo()
: id(LL_MININT),
unique(false),
autoIncrement(false)
{
MOZ_COUNT_CTOR(IndexInfo);
}
IndexInfo::~IndexInfo()
{
MOZ_COUNT_DTOR(IndexInfo);
}
ObjectStoreInfo::ObjectStoreInfo()
: id(0),
autoIncrement(false),
databaseId(0)
{
MOZ_COUNT_CTOR(ObjectStoreInfo);
}
ObjectStoreInfo::~ObjectStoreInfo()
{
MOZ_COUNT_DTOR(ObjectStoreInfo);
}
IndexUpdateInfo::IndexUpdateInfo()
{
MOZ_COUNT_CTOR(IndexUpdateInfo);
}
IndexUpdateInfo::~IndexUpdateInfo()
{
MOZ_COUNT_DTOR(IndexUpdateInfo);
}
#endif /* NS_BUILD_REFCNT_LOGGING */
// static
bool
DatabaseInfo::Get(PRUint32 aId,
DatabaseInfo** aInfo)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
NS_ASSERTION(aId, "Bad id!");
if (gDatabaseHash) {
DatabaseInfoHash* hash;
if (gDatabaseHash->Get(aId, &hash)) {
if (aInfo) {
*aInfo = hash->info;
}
return true;
}
}
return false;
}
// static
bool
DatabaseInfo::Put(DatabaseInfo* aInfo)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
NS_ASSERTION(aInfo, "Null pointer!");
if (!gDatabaseHash) {
nsAutoPtr<DatabaseHash> databaseHash(new DatabaseHash());
if (!databaseHash->Init()) {
NS_ERROR("Failed to initialize hashtable!");
return false;
}
gDatabaseHash = databaseHash.forget();
}
if (gDatabaseHash->Get(aInfo->id, nsnull)) {
NS_ERROR("Already know about this database!");
return false;
}
nsAutoPtr<DatabaseInfoHash> hash(new DatabaseInfoHash(aInfo));
if (!gDatabaseHash->Put(aInfo->id, hash)) {
NS_ERROR("Put failed!");
return false;
}
hash.forget();
return true;
}
// static
void
DatabaseInfo::Remove(PRUint32 aId)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
NS_ASSERTION(Get(aId, nsnull), "Don't know anything about this one!");
if (gDatabaseHash) {
gDatabaseHash->Remove(aId);
if (!gDatabaseHash->Count()) {
delete gDatabaseHash;
gDatabaseHash = nsnull;
}
}
}
bool
DatabaseInfo::GetObjectStoreNames(nsTArray<nsString>& aNames)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
NS_ASSERTION(Get(id, nsnull), "Don't know anything about this one!");
if (!gDatabaseHash) {
return false;
}
DatabaseInfoHash* info;
if (!gDatabaseHash->Get(id, &info)) {
return false;
}
aNames.Clear();
if (info->objectStoreHash) {
info->objectStoreHash->EnumerateRead(EnumerateObjectStoreNames, &aNames);
}
return true;
}
bool
DatabaseInfo::ContainsStoreName(const nsAString& aName)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
NS_ASSERTION(Get(id, nsnull), "Don't know anything about this one!");
DatabaseInfoHash* hash;
ObjectStoreInfo* info;
return gDatabaseHash &&
gDatabaseHash->Get(id, &hash) &&
hash->objectStoreHash &&
hash->objectStoreHash->Get(aName, &info);
}
// static
bool
ObjectStoreInfo::Get(PRUint32 aDatabaseId,
const nsAString& aName,
ObjectStoreInfo** aInfo)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
NS_ASSERTION(!aName.IsEmpty(), "Empty object store name!");
if (gDatabaseHash) {
DatabaseInfoHash* hash;
if (gDatabaseHash->Get(aDatabaseId, &hash)) {
if (hash->objectStoreHash) {
return !!hash->objectStoreHash->Get(aName, aInfo);
}
}
}
return false;
}
// static
bool
ObjectStoreInfo::Put(ObjectStoreInfo* aInfo)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
NS_ASSERTION(aInfo, "Null pointer!");
if (!gDatabaseHash) {
NS_ERROR("No databases known!");
return false;
}
DatabaseInfoHash* hash;
if (!gDatabaseHash->Get(aInfo->databaseId, &hash)) {
NS_ERROR("Don't know about this database!");
return false;
}
if (!hash->objectStoreHash) {
nsAutoPtr<ObjectStoreInfoHash> objectStoreHash(new ObjectStoreInfoHash());
if (!objectStoreHash->Init()) {
NS_ERROR("Failed to initialize hashtable!");
return false;
}
hash->objectStoreHash = objectStoreHash.forget();
}
if (hash->objectStoreHash->Get(aInfo->name, nsnull)) {
NS_ERROR("Already have an entry for this objectstore!");
return false;
}
return !!hash->objectStoreHash->Put(aInfo->name, aInfo);
}
// static
void
ObjectStoreInfo::Remove(PRUint32 aDatabaseId,
const nsAString& aName)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
NS_ASSERTION(Get(aDatabaseId, aName, nsnull), "Don't know about this one!");
if (gDatabaseHash) {
DatabaseInfoHash* hash;
if (gDatabaseHash->Get(aDatabaseId, &hash) && hash->objectStoreHash) {
hash->objectStoreHash->Remove(aName);
}
}
}