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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* 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/ref.hxx>
#include <osl/mutex.hxx>
#include <store/types.h>
#include "object.hxx"
#include "storbase.hxx"
namespace store
{
class ILockBytes;
class PageCache;
struct SuperBlockPage;
class OStorePageBIOS : public store::OStoreObject
{
public:
OStorePageBIOS();
/** Conversion into Mutex&
*/
inline operator osl::Mutex& (void) const;
/** Initialization.
* @param pLockBytes [in]
* @param eAccessMode [in]
* @param rnPageSize [inout]
* @return store_E_None upon success
*/
virtual storeError initialize (
ILockBytes * pLockBytes,
storeAccessMode eAccessMode,
sal_uInt16 & rnPageSize);
rtl::Reference< PageData::Allocator > & allocator()
{
return m_xAllocator;
}
storeError read (
sal_uInt32 nAddr, void *pData, sal_uInt32 nSize) const;
storeError write (
sal_uInt32 nAddr, const void *pData, sal_uInt32 nSize) const;
inline bool isWriteable() const;
inline bool isValid() const;
storeError acquirePage (
const OStorePageDescriptor& rDescr, storeAccessMode eMode);
storeError releasePage (const OStorePageDescriptor& rDescr);
storeError allocate (OStorePageObject& rPage);
storeError free (sal_uInt32 nAddr);
/** Page I/O.
*/
storeError loadObjectAt (
OStorePageObject& rPage, sal_uInt32 nAddr);
storeError saveObjectAt (
OStorePageObject& rPage, sal_uInt32 nAddr);
/** close.
@return store_E_None upon success.
*/
storeError close();
/** flush.
@return store_E_None upon success.
*/
storeError flush();
protected:
virtual ~OStorePageBIOS() override;
private:
rtl::Reference<ILockBytes> m_xLockBytes;
osl::Mutex m_aMutex;
std::unique_ptr<SuperBlockPage> m_pSuper;
bool m_bWriteable;
rtl::Reference< PageData::Allocator > m_xAllocator;
rtl::Reference< PageCache > m_xCache;
public:
/** Page Access (control).
*/
struct Ace
{
Ace * m_next;
Ace * m_prev;
sal_uInt32 m_addr;
sal_uInt32 m_used;
Ace();
~Ace();
static int SAL_CALL constructor (void * obj, void * arg);
static Ace * find (Ace * head, sal_uInt32 addr);
static void insert (Ace * head, Ace * entry);
};
private:
Ace m_ace_head;
class AceCache;
storeError initialize_Impl (
ILockBytes * pLockBytes,
storeAccessMode eAccessMode,
sal_uInt16 & rnPageSize);
void cleanup_Impl();
storeError loadObjectAt_Impl (
OStorePageObject & rPage, sal_uInt32 nAddr) const;
storeError saveObjectAt_Impl (
OStorePageObject & rPage, sal_uInt32 nAddr) const;
OStorePageBIOS (const OStorePageBIOS&) = delete;
OStorePageBIOS& operator= (const OStorePageBIOS&) = delete;
};
inline OStorePageBIOS::operator osl::Mutex& (void) const
{
return const_cast<osl::Mutex&>(m_aMutex);
}
inline bool OStorePageBIOS::isWriteable() const
{
return m_bWriteable;
}
inline bool OStorePageBIOS::isValid() const
{
return m_xLockBytes.is();
}
} // namespace store
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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