test-suite/VirtualDeleteOperator.cc

   1
   2 /*
   3  * $Id: VirtualDeleteOperator.cc,v 1.2 2004/08/15 17:41:28 robertc Exp $
   4  *
   5  * AUTHOR: Robert Collins
   6  *
   7  * SQUID Web Proxy Cache          http://www.squid-cache.org/
   8  * ----------------------------------------------------------
   9  *
  10  *  Squid is the result of efforts by numerous individuals from
  11  *  the Internet community; see the CONTRIBUTORS file for full
  12  *  details.   Many organizations have provided support for Squid's
  13  *  development; see the SPONSORS file for full details.  Squid is
  14  *  Copyrighted (C) 2001 by the Regents of the University of
  15  *  California; see the COPYRIGHT file for full details.  Squid
  16  *  incorporates software developed and/or copyrighted by other
  17  *  sources; see the CREDITS file for full details.
  18  *
  19  *  This program is free software; you can redistribute it and/or modify
  20  *  it under the terms of the GNU General Public License as published by
  21  *  the Free Software Foundation; either version 2 of the License, or
  22  *  (at your option) any later version.
  23  *
  24  *  This program is distributed in the hope that it will be useful,
  25  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  26  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  27  *  GNU General Public License for more details.
  28  *
  29  *  You should have received a copy of the GNU General Public License
  30  *  along with this program; if not, write to the Free Software
  31  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
  32  *
  33  * Copyright (c) 2003  Robert Collins <robertc@squid-cache.org>
  34  */
  35
  36 #include "squid.h"
  37 #include <iostream>
  38
  39 class CallCounter {
  40   public:
  41     CallCounter();
  42     void recordNew();
  43     void recordDelete();
  44     size_t news() const;
  45     size_t deletes() const;
  46   private:
  47     size_t _news, _deletes;
  48 };
  49
  50 CallCounter::CallCounter() : _news(0), _deletes(0) {}
  51
  52 void CallCounter::recordNew() { ++_news;}
  53 void CallCounter::recordDelete() { ++_deletes;}
  54 size_t CallCounter::news() const {return _news;}
  55 size_t CallCounter::deletes() const {return _deletes;}
  56
  57 class BaseVirtual {
  58   public:
  59     void *operator new (size_t);
  60     void operator delete (void *);
  61     virtual ~BaseVirtual();
  62     static void DeleteABase(BaseVirtual *aBase);
  63     static CallCounter Calls;
  64 };
  65
  66 CallCounter BaseVirtual::Calls;
  67
  68 void *
  69 BaseVirtual::operator new(size_t byteCount)
  70 {
  71     Calls.recordNew();
  72     return ::operator new (byteCount);
  73 }
  74
  75 void
  76 BaseVirtual::operator delete(void *address)
  77 {
  78     Calls.recordDelete();
  79     ::operator delete (address);
  80 }
  81
  82 void
  83 BaseVirtual::DeleteABase(BaseVirtual *aBase)
  84 {
  85     delete aBase;
  86 }
  87
  88 BaseVirtual::~BaseVirtual(){}
  89
  90 class ChildVirtual : public BaseVirtual {
  91   public:
  92     void *operator new (size_t);
  93     void operator delete (void *);
  94     virtual ~ChildVirtual();
  95     static CallCounter Calls;
  96 };
  97
  98 CallCounter ChildVirtual::Calls;
  99
 100 void *
 101 ChildVirtual::operator new(size_t byteCount)
 102 {
 103     Calls.recordNew();
 104     return ::operator new (byteCount);
 105 }
 106
 107 void
 108 ChildVirtual::operator delete(void *address)
 109 {
 110     Calls.recordDelete();
 111     ::operator delete (address);
 112 }
 113
 114 ChildVirtual::~ChildVirtual(){}
 115
 116 int
 117 main(int argc, char **argv)
 118 {
 119     assert (BaseVirtual::Calls.news() == 0);
 120     assert (BaseVirtual::Calls.deletes() == 0);
 121     assert (ChildVirtual::Calls.news() == 0);
 122     assert (ChildVirtual::Calls.deletes() == 0);
 123     BaseVirtual *aBase = new ChildVirtual;
 124     assert (BaseVirtual::Calls.news() == 0);
 125     assert (BaseVirtual::Calls.deletes() == 0);
 126     assert (ChildVirtual::Calls.news() == 1);
 127     assert (ChildVirtual::Calls.deletes() == 0);
 128     BaseVirtual::DeleteABase(aBase);
 129     assert (BaseVirtual::Calls.news() == 0);
 130     assert (BaseVirtual::Calls.deletes() == 0);
 131     assert (ChildVirtual::Calls.news() == 1);
 132     assert (ChildVirtual::Calls.deletes() == 1);
 133     // deleting NULL works.
 134     BaseVirtual::DeleteABase(NULL);
 135     assert (BaseVirtual::Calls.news() == 0);
 136     assert (BaseVirtual::Calls.deletes() == 0);
 137     assert (ChildVirtual::Calls.news() == 1);
 138     assert (ChildVirtual::Calls.deletes() == 1);
 139     return 0;
 140 }