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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 .
*/
#ifndef INCLUDED_STORE_SOURCE_STORBIOS_HXX
#define INCLUDED_STORE_SOURCE_STORBIOS_HXX
#include "sal/types.h"
#include "rtl/ref.hxx"
#include "osl/mutex.hxx"
#include "store/types.h"
#include "object.hxx"
#include "lockbyte.hxx"
#include "storbase.hxx"
#include "storcach.hxx"
/*========================================================================
*
* OStorePageBIOS.
*
*======================================================================*/
namespace store
{
struct SuperBlockPage;
class OStorePageBIOS : public store::OStoreObject
{
public:
/** Construction.
*/
OStorePageBIOS (void);
/** 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;
}
/** read.
*/
storeError read (
sal_uInt32 nAddr, void *pData, sal_uInt32 nSize);
/** write.
*/
storeError write (
sal_uInt32 nAddr, const void *pData, sal_uInt32 nSize);
/** isWriteable.
*/
inline bool isWriteable (void) const;
/** isValid.
*/
inline bool isValid (void) const;
/** Page Access.
*/
storeError acquirePage (
const OStorePageDescriptor& rDescr, storeAccessMode eMode);
storeError releasePage (const OStorePageDescriptor& rDescr);
sal_uInt32 getRefererCount (void);
/** Page Allocation.
*/
enum Allocation
{
ALLOCATE_FIRST = 0,
ALLOCATE_BEST = 1,
ALLOCATE_EOF = 2
};
storeError allocate (
OStorePageObject& rPage, Allocation eAllocation = ALLOCATE_FIRST);
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 (void);
/** flush.
* @return store_E_None upon success.
*/
storeError flush (void);
/** size.
*/
storeError size (sal_uInt32 &rnSize);
/** ScanContext.
*/
struct ScanContext
{
/** Representation.
*/
OStorePageDescriptor m_aDescr;
sal_uInt32 m_nSize;
sal_uInt32 m_nMagic;
/** Construction.
*/
inline ScanContext (void);
/** isValid.
*/
inline bool isValid (void) const;
};
/** scanBegin.
*/
storeError scanBegin (
ScanContext &rCtx,
sal_uInt32 nMagic = 0);
/** scanNext.
*/
storeError scanNext (
ScanContext &rCtx,
OStorePageObject &rPage);
protected:
/** Destruction (OReference).
*/
virtual ~OStorePageBIOS (void);
private:
/** Representation.
*/
rtl::Reference<ILockBytes> m_xLockBytes;
osl::Mutex m_aMutex;
SuperBlockPage * m_pSuper;
bool m_bWriteable;
rtl::Reference< PageData::Allocator > m_xAllocator;
rtl::Reference< PageCache > m_xCache;
/** Page Access (control).
*/
public:
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;
/** Initialization.
*/
storeError initialize_Impl (
ILockBytes * pLockBytes,
storeAccessMode eAccessMode,
sal_uInt16 & rnPageSize);
void cleanup_Impl();
/** Page Maintenance.
*/
storeError loadObjectAt_Impl (
OStorePageObject & rPage, sal_uInt32 nAddr);
storeError saveObjectAt_Impl (
OStorePageObject & rPage, sal_uInt32 nAddr);
/** Not implemented.
*/
OStorePageBIOS (const OStorePageBIOS&);
OStorePageBIOS& operator= (const OStorePageBIOS&);
};
inline OStorePageBIOS::operator osl::Mutex& (void) const
{
return (osl::Mutex&)m_aMutex;
}
inline bool OStorePageBIOS::isWriteable (void) const
{
return m_bWriteable;
}
inline bool OStorePageBIOS::isValid (void) const
{
return m_xLockBytes.is();
}
inline OStorePageBIOS::ScanContext::ScanContext (void)
: m_aDescr (0, 0, 0), m_nSize (0), m_nMagic (0)
{
}
inline bool OStorePageBIOS::ScanContext::isValid (void) const
{
return (m_aDescr.m_nAddr < m_nSize);
}
/*========================================================================
*
* The End.
*
*======================================================================*/
} // namespace store
#endif // INCLUDED_STORE_SOURCE_STORBIOS_HXX
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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