C++ (Cpp) PassRefPtr::getKeyGeneratorCurrentNumber Exemples

Exemple #1

PassRefPtr<IDBKey> IDBObjectStoreBackendLevelDB::generateKey(PassRefPtr<IDBBackingStore> backingStore, PassRefPtr<IDBTransactionBackendLevelDB> transaction, int64_t databaseId, int64_t objectStoreId)
{
    const int64_t maxGeneratorValue = 9007199254740992LL; // Maximum integer storable as ECMAScript number.
    int64_t currentNumber;
    bool ok = backingStore->getKeyGeneratorCurrentNumber(transaction->backingStoreTransaction(), databaseId, objectStoreId, currentNumber);
    if (!ok) {
        LOG_ERROR("Failed to getKeyGeneratorCurrentNumber");
        return IDBKey::createInvalid();
    }
    if (currentNumber < 0 || currentNumber > maxGeneratorValue)
        return IDBKey::createInvalid();

    return IDBKey::createNumber(currentNumber);
}