storlckb.hxx

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
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 *
 * 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/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 .
 */
 
#pragma once
 
#include <sal/types.h>
 
#include <rtl/string.h>
#include <rtl/ref.hxx>
 
#include "object.hxx"
#include "storbase.hxx"
 
namespace store
{
 
class OStorePageManager;
struct OStoreDataPageData;
struct OStoreDirectoryPageData;
 
class OStoreLockBytes : public store::OStoreObject
{
public:
    OStoreLockBytes();
 
    storeError create (
        OStorePageManager *pManager,
        rtl_String const  *pPath,
        rtl_String const  *pName,
        storeAccessMode    eAccessMode);
 
    storeError readAt (
        sal_uInt32  nOffset,
        void       *pBuffer,
        sal_uInt32  nBytes,
        sal_uInt32 &rnDone);
 
    storeError writeAt (
        sal_uInt32  nOffset,
        const void *pBuffer,
        sal_uInt32  nBytes,
        sal_uInt32 &rnDone);
 
    storeError setSize (sal_uInt32 nSize);
 
    virtual bool isKindOf (sal_uInt32 nMagic) override;
 
protected:
    virtual ~OStoreLockBytes() override;
 
private:
    static const sal_uInt32 m_nTypeId;
 
    friend OStoreLockBytes*
    SAL_CALL query<> (OStoreObject *pHandle, OStoreLockBytes*);
 
    rtl::Reference<OStorePageManager> m_xManager;
 
    typedef OStoreDataPageData        data;
    typedef OStoreDirectoryPageData   inode;
 
    typedef PageHolderObject< inode > inode_holder_type;
    inode_holder_type                 m_xNode;
 
    bool m_bWriteable;
 
    OStoreLockBytes (const OStoreLockBytes&) = delete;
    OStoreLockBytes& operator= (const OStoreLockBytes&) = delete;
};
 
template<> inline OStoreLockBytes*
SAL_CALL query (OStoreObject *pHandle, SAL_UNUSED_PARAMETER OStoreLockBytes*)
{
    if (pHandle && pHandle->isKindOf (OStoreLockBytes::m_nTypeId))
    {
        // Handle is kind of OStoreLockBytes.
        return static_cast<OStoreLockBytes*>(pHandle);
    }
    return nullptr;
}
 
} // namespace store
 
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