store/source/storbase.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*************************************************************************
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  28
  29
  30 #include "storbase.hxx"
  31
  32 #include "sal/types.h"
  33 #include "rtl/alloc.h"
  34 #include "rtl/ref.hxx"
  35 #include "osl/diagnose.h"
  36
  37 #include "store/types.h"
  38 #include "object.hxx"
  39
  40 #ifndef INCLUDED_STDIO_H
  41 #include <stdio.h>
  42 #define INCLUDED_STDIO_H
  43 #endif
  44
  45 using namespace store;
  46
  47 /*========================================================================
  48  *
  49  * SharedCount::Allocator.
  50  *
  51  *======================================================================*/
  52 SharedCount::Allocator &
  53 SharedCount::Allocator::get()
  54 {
  55     static Allocator g_aSharedCountAllocator;
  56     return g_aSharedCountAllocator;
  57 }
  58
  59 SharedCount::Allocator::Allocator()
  60 {
  61     m_cache = rtl_cache_create (
  62         "store_shared_count_cache",
  63         sizeof(long),
  64         0, // objalign
  65         0, // constructor
  66         0, // destructor
  67         0, // reclaim
  68         0, // userarg
  69         0, // default source
  70         0  // flags
  71         );
  72 }
  73
  74 SharedCount::Allocator::~Allocator()
  75 {
  76     rtl_cache_destroy (m_cache), m_cache = 0;
  77 }
  78
  79 /*========================================================================
  80  *
  81  * PageData::Allocator_Impl (default allocator).
  82  *
  83  *======================================================================*/
  84 namespace store
  85 {
  86
  87 class PageData::Allocator_Impl :
  88     public store::OStoreObject,
  89     public store::PageData::Allocator
  90 {
  91 public:
  92     /** Construction (two phase).
  93      */
  94     Allocator_Impl();
  95
  96     storeError initialize (sal_uInt16 nPageSize);
  97
  98     /** Delegate multiple inherited rtl::IReference.
  99      */
 100     virtual oslInterlockedCount SAL_CALL acquire()
 101     {
 102         return OStoreObject::acquire();
 103     }
 104     virtual oslInterlockedCount SAL_CALL release()
 105     {
 106         return OStoreObject::release();
 107     }
 108
 109 protected:
 110     /** Destruction.
 111      */
 112     virtual ~Allocator_Impl();
 113
 114 private:
 115     /** Representation.
 116      */
 117     rtl_cache_type * m_page_cache;
 118     sal_uInt16       m_page_size;
 119
 120     /** PageData::Allocator implementation.
 121      */
 122     virtual void allocate_Impl (void ** ppPage, sal_uInt16 * pnSize);
 123     virtual void deallocate_Impl (void * pPage);
 124
 125     /** Not implemented.
 126      */
 127     Allocator_Impl (Allocator_Impl const &);
 128     Allocator_Impl & operator= (Allocator_Impl const &);
 129 };
 130
 131 } // namespace store
 132
 133 PageData::Allocator_Impl::Allocator_Impl()
 134     : m_page_cache(0), m_page_size(0)
 135 {}
 136
 137 storeError
 138 PageData::Allocator_Impl::initialize (sal_uInt16 nPageSize)
 139 {
 140     char name[RTL_CACHE_NAME_LENGTH + 1];
 141     sal_Size size = sal::static_int_cast< sal_Size >(nPageSize);
 142     (void) snprintf (name, sizeof(name), "store_page_alloc_%lu", size);
 143
 144     m_page_cache = rtl_cache_create (name, size, 0, 0, 0, 0, 0, 0, 0);
 145     if (!m_page_cache)
 146         return store_E_OutOfMemory;
 147
 148     m_page_size = nPageSize;
 149     return store_E_None;
 150 }
 151
 152 PageData::Allocator_Impl::~Allocator_Impl()
 153 {
 154     rtl_cache_destroy(m_page_cache), m_page_cache = 0;
 155 }
 156
 157 void PageData::Allocator_Impl::allocate_Impl (void ** ppPage, sal_uInt16 * pnSize)
 158 {
 159     OSL_PRECOND((ppPage != 0) && (pnSize != 0), "contract violation");
 160     if ((ppPage != 0) && (pnSize != 0))
 161         *ppPage = rtl_cache_alloc(m_page_cache), *pnSize = m_page_size;
 162 }
 163
 164 void PageData::Allocator_Impl::deallocate_Impl (void * pPage)
 165 {
 166     OSL_PRECOND(pPage != 0, "contract violation");
 167     rtl_cache_free(m_page_cache, pPage);
 168 }
 169
 170 /*========================================================================
 171  *
 172  * PageData::Allocator factory.
 173  *
 174  *======================================================================*/
 175
 176 storeError
 177 PageData::Allocator::createInstance (rtl::Reference< PageData::Allocator > & rxAllocator, sal_uInt16 nPageSize)
 178 {
 179     rtl::Reference< PageData::Allocator_Impl > xAllocator (new PageData::Allocator_Impl());
 180     if (!xAllocator.is())
 181         return store_E_OutOfMemory;
 182
 183     rxAllocator = &*xAllocator;
 184     return xAllocator->initialize (nPageSize);
 185 }
 186
 187 /*========================================================================
 188  *
 189  * OStorePageObject.
 190  *
 191  *======================================================================*/
 192 /*
 193  * ~OStorePageObject.
 194  */
 195 OStorePageObject::~OStorePageObject (void)
 196 {
 197 }
 198
 199 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */