include/vcl/vclreferencebase.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.
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   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 #ifndef INCLUDED_VCL_Reference_HXX
  20 #define INCLUDED_VCL_Reference_HXX
  21
  22 #include <vcl/dllapi.h>
  23 #include <tools/debug.hxx>
  24 #include <osl/interlck.h>
  25
  26 #include <cassert>
  27
  28 class VclReferenceBase;
  29
  30 class VCL_DLLPUBLIC VclReferenceBase
  31 {
  32     mutable oslInterlockedCount mnRefCnt;
  33
  34     template<typename T> friend class VclPtr;
  35
  36 public:
  37     void acquire() const
  38     {
  39         osl_atomic_increment(&mnRefCnt);
  40     }
  41
  42     void release() const
  43     {
  44         if (osl_atomic_decrement(&mnRefCnt) == 0)
  45             delete this;
  46     }
  47 private:
  48     VclReferenceBase(const VclReferenceBase&) = delete;
  49     VclReferenceBase& operator=(const VclReferenceBase&) = delete;
  50
  51     bool                        mbDisposed : 1;
  52
  53 protected:
  54                                 VclReferenceBase();
  55 protected:
  56     virtual                     ~VclReferenceBase();
  57
  58 protected:
  59     virtual void                dispose();
  60
  61 public:
  62     void                        disposeOnce();
  63     bool                        isDisposed() const { return mbDisposed; }
  64
  65 };
  66 #endif