include/salhelper/refobj.hxx

   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 /*
  21  * This file is part of LibreOffice published API.
  22  */
  23
  24 #ifndef INCLUDED_SALHELPER_REFOBJ_HXX
  25 #define INCLUDED_SALHELPER_REFOBJ_HXX
  26
  27 #include <cassert>
  28
  29 #include "sal/types.h"
  30 #include "rtl/alloc.h"
  31 #include "osl/interlck.h"
  32
  33 namespace salhelper
  34 {
  35
  36 /** A base implementation for reference-counted objects.
  37
  38     @deprecated use salhelper::SimpleReferenceObject instead
  39 */
  40 class ReferenceObject
  41 {
  42     /** Representation.
  43      */
  44     oslInterlockedCount m_nReferenceCount;
  45
  46     ReferenceObject (const ReferenceObject&) SAL_DELETED_FUNCTION;
  47     ReferenceObject& operator= (const ReferenceObject&) SAL_DELETED_FUNCTION;
  48
  49 public:
  50     /** Allocation.
  51      */
  52     static void* operator new (size_t n)
  53     {
  54         return ::rtl_allocateMemory (n);
  55     }
  56     static void operator delete (void* p)
  57     {
  58         ::rtl_freeMemory (p);
  59     }
  60     static void* operator new (size_t, void* p)
  61     {
  62         return p;
  63     }
  64     static void operator delete (void*, void*)
  65     {}
  66
  67 public:
  68     /** Construction.
  69      */
  70     ReferenceObject() : m_nReferenceCount(0)
  71     {}
  72
  73
  74     void SAL_CALL acquire()
  75     {
  76         osl_atomic_increment(&m_nReferenceCount);
  77     }
  78
  79     void SAL_CALL release()
  80     {
  81         if (osl_atomic_decrement(&m_nReferenceCount) == 0)
  82         {
  83             // Last reference released.
  84             delete this;
  85         }
  86     }
  87
  88 protected:
  89     /** Destruction.
  90      */
  91     virtual ~ReferenceObject()
  92     {
  93         assert(m_nReferenceCount == 0);
  94     }
  95 };
  96
  97
  98 } // namespace salhelper
  99
 100 #endif /* ! INCLUDED_SALHELPER_REFOBJ_HXX */
 101
 102 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */