store/source/storbase.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include "storbase.hxx"
  21
  22 #include <sal/types.h>
  23 #include <rtl/alloc.h>
  24 #include <rtl/ref.hxx>
  25 #include <osl/diagnose.h>
  26
  27 #include <store/types.h>
  28 #include "object.hxx"
  29
  30 #include <stdio.h>
  31
  32 using namespace store;
  33
  34 // PageData::Allocator_Impl (default allocator).
  35
  36 namespace store
  37 {
  38
  39 class PageData::Allocator_Impl :
  40     public store::OStoreObject,
  41     public store::PageData::Allocator
  42 {
  43 public:
  44     /** Construction (two phase).
  45      */
  46     Allocator_Impl();
  47
  48     Allocator_Impl(const Allocator_Impl&) = delete;
  49     Allocator_Impl& operator=(const Allocator_Impl&) = delete;
  50
  51     storeError initialize (sal_uInt16 nPageSize);
  52
  53 protected:
  54     virtual ~Allocator_Impl() override;
  55
  56 private:
  57     rtl_cache_type * m_page_cache;
  58     sal_uInt16       m_page_size;
  59
  60     /** PageData::Allocator implementation.
  61      */
  62     virtual void allocate_Impl (void ** ppPage, sal_uInt16 * pnSize) override;
  63     virtual void deallocate_Impl (void * pPage) override;
  64 };
  65
  66 } // namespace store
  67
  68 PageData::Allocator_Impl::Allocator_Impl()
  69     : m_page_cache(nullptr), m_page_size(0)
  70 {}
  71
  72 storeError
  73 PageData::Allocator_Impl::initialize (sal_uInt16 nPageSize)
  74 {
  75     char name[RTL_CACHE_NAME_LENGTH + 1];
  76     std::size_t size = sal::static_int_cast<std::size_t>(nPageSize);
  77     (void) snprintf (name, sizeof(name), "store_page_alloc_%" SAL_PRI_SIZET "u", size);
  78
  79     m_page_cache = rtl_cache_create (name, size, 0, nullptr, nullptr, nullptr, nullptr, nullptr, 0);
  80     if (!m_page_cache)
  81         return store_E_OutOfMemory;
  82
  83     m_page_size = nPageSize;
  84     return store_E_None;
  85 }
  86
  87 PageData::Allocator_Impl::~Allocator_Impl()
  88 {
  89     rtl_cache_destroy(m_page_cache);
  90     m_page_cache = nullptr;
  91 }
  92
  93 void PageData::Allocator_Impl::allocate_Impl (void ** ppPage, sal_uInt16 * pnSize)
  94 {
  95     OSL_PRECOND((ppPage != nullptr) && (pnSize != nullptr), "contract violation");
  96     if ((ppPage != nullptr) && (pnSize != nullptr))
  97     {
  98         *ppPage = rtl_cache_alloc(m_page_cache);
  99         *pnSize = m_page_size;
 100     }
 101 }
 102
 103 void PageData::Allocator_Impl::deallocate_Impl (void * pPage)
 104 {
 105     OSL_PRECOND(pPage != nullptr, "contract violation");
 106     rtl_cache_free(m_page_cache, pPage);
 107 }
 108
 109 storeError
 110 PageData::Allocator::createInstance (rtl::Reference< PageData::Allocator > & rxAllocator, sal_uInt16 nPageSize)
 111 {
 112     rtl::Reference< PageData::Allocator_Impl > xAllocator (new PageData::Allocator_Impl());
 113     rxAllocator = &*xAllocator;
 114     return xAllocator->initialize (nPageSize);
 115 }
 116
 117 OStorePageObject::~OStorePageObject()
 118 {
 119 }
 120
 121 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */