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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:
+ /** Construction.
+ */
+ 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;
+ }
+
+ /** read.
+ */
+ storeError read (
+ sal_uInt32 nAddr, void *pData, sal_uInt32 nSize) const;
+
+ /** write.
+ */
+ storeError write (
+ sal_uInt32 nAddr, const void *pData, sal_uInt32 nSize) const;
+
+ /** isWriteable.
+ */
+ inline bool isWriteable() const;
+
+ /** isValid.
+ */
+ inline bool isValid() const;
+
+ /** Page Access.
+ */
+ 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:
+ /** Destruction (OReference).
+ */
+ virtual ~OStorePageBIOS() override;
+
+private:
+ /** Representation.
+ */
+ 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;
+
+ /** 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) 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: */