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       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                 :            : #ifndef _NULLCANVAS_USAGECOUNTER_HXX
      21                 :            : #define _NULLCANVAS_USAGECOUNTER_HXX
      22                 :            : 
      23                 :            : #include <osl/interlck.h>
      24                 :            : #include <boost/current_function.hpp>
      25                 :            : 
      26                 :            : namespace nullcanvas
      27                 :            : {
      28                 :            :     /** Little resource tracking counter.
      29                 :            : 
      30                 :            :         When using this object, a global use counter, specific to the
      31                 :            :         given type is incremented on object construction, and
      32                 :            :         decremented on object destruction.
      33                 :            :      */
      34                 :            :     template< class Type > class UsageCounter
      35                 :            :     {
      36                 :            :     public:
      37                 :          0 :         UsageCounter()
      38                 :            :         {
      39                 :            :             OSL_TRACE( "%s, %d objects currently in use.\n",
      40                 :            :                        BOOST_CURRENT_FUNCTION,
      41                 :            :                        osl_incrementInterlockedCount( &s_nCount ) );
      42                 :          0 :         }
      43                 :            : 
      44                 :          0 :         ~UsageCounter()
      45                 :            :         {
      46                 :          0 :             const sal_Int32 nCount( osl_decrementInterlockedCount( &s_nCount ) );
      47                 :            : 
      48                 :            :             if( !nCount )
      49                 :            :             {
      50                 :            :                 OSL_TRACE( "%s, last instance deleted.\n",
      51                 :            :                            BOOST_CURRENT_FUNCTION );
      52                 :            :             }
      53                 :            :             else
      54                 :            :             {
      55                 :            :                 OSL_TRACE( "%s, %d instances left.\n",
      56                 :            :                            BOOST_CURRENT_FUNCTION,
      57                 :            :                            nCount );
      58                 :            :             }
      59                 :          0 :         }
      60                 :            : 
      61                 :            :     private:
      62                 :            :         static oslInterlockedCount s_nCount;
      63                 :            :     };
      64                 :            : 
      65                 :            :     template< class Type > oslInterlockedCount UsageCounter<Type>::s_nCount = 0;
      66                 :            : }
      67                 :            : 
      68                 :            : #endif /* _NULLCANVAS_USAGECOUNTER_HXX */
      69                 :            : 
      70                 :            : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */