145 lines
4 KiB
C++
145 lines
4 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#include "storbase.hxx"
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#include <sal/types.h>
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#include <rtl/alloc.h>
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#include <rtl/ref.hxx>
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#include <osl/diagnose.h>
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#include <store/types.h>
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#include "object.hxx"
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#include <stdio.h>
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using namespace store;
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/*========================================================================
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*
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* PageData::Allocator_Impl (default allocator).
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*
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*======================================================================*/
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namespace store
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{
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class PageData::Allocator_Impl :
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public store::OStoreObject,
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public store::PageData::Allocator
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{
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public:
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/** Construction (two phase).
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*/
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Allocator_Impl();
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Allocator_Impl(const Allocator_Impl&) = delete;
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Allocator_Impl& operator=(const Allocator_Impl&) = delete;
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storeError initialize (sal_uInt16 nPageSize);
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protected:
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/** Destruction.
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*/
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virtual ~Allocator_Impl() override;
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private:
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/** Representation.
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*/
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rtl_cache_type * m_page_cache;
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sal_uInt16 m_page_size;
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/** PageData::Allocator implementation.
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*/
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virtual void allocate_Impl (void ** ppPage, sal_uInt16 * pnSize) override;
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virtual void deallocate_Impl (void * pPage) override;
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};
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} // namespace store
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PageData::Allocator_Impl::Allocator_Impl()
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: m_page_cache(nullptr), m_page_size(0)
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{}
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storeError
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PageData::Allocator_Impl::initialize (sal_uInt16 nPageSize)
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{
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char name[RTL_CACHE_NAME_LENGTH + 1];
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std::size_t size = sal::static_int_cast<std::size_t>(nPageSize);
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(void) snprintf (name, sizeof(name), "store_page_alloc_%" SAL_PRI_SIZET "u", size);
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m_page_cache = rtl_cache_create (name, size, 0, nullptr, nullptr, nullptr, nullptr, nullptr, 0);
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if (!m_page_cache)
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return store_E_OutOfMemory;
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m_page_size = nPageSize;
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return store_E_None;
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}
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PageData::Allocator_Impl::~Allocator_Impl()
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{
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rtl_cache_destroy(m_page_cache);
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m_page_cache = nullptr;
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}
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void PageData::Allocator_Impl::allocate_Impl (void ** ppPage, sal_uInt16 * pnSize)
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{
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OSL_PRECOND((ppPage != nullptr) && (pnSize != nullptr), "contract violation");
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if ((ppPage != nullptr) && (pnSize != nullptr))
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{
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*ppPage = rtl_cache_alloc(m_page_cache);
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*pnSize = m_page_size;
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}
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}
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void PageData::Allocator_Impl::deallocate_Impl (void * pPage)
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{
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OSL_PRECOND(pPage != nullptr, "contract violation");
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rtl_cache_free(m_page_cache, pPage);
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}
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/*========================================================================
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*
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* PageData::Allocator factory.
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*
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*======================================================================*/
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storeError
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PageData::Allocator::createInstance (rtl::Reference< PageData::Allocator > & rxAllocator, sal_uInt16 nPageSize)
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{
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rtl::Reference< PageData::Allocator_Impl > xAllocator (new PageData::Allocator_Impl());
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if (!xAllocator.is())
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return store_E_OutOfMemory;
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rxAllocator = &*xAllocator;
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return xAllocator->initialize (nPageSize);
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}
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/*========================================================================
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*
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* OStorePageObject.
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*
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*======================================================================*/
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/*
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* ~OStorePageObject.
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*/
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OStorePageObject::~OStorePageObject()
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{
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}
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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