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 {
  41 public:
  42     CallCounter();
  43     void recordNew();
  44     void recordDelete();
  45     size_t news() const;
  46     size_t deletes() const;
  47 private:
  48     size_t _news, _deletes;
  49 };
  50
  51 CallCounter::CallCounter() : _news(0), _deletes(0) {}
  52
  53 void CallCounter::recordNew() { ++_news;}
  54 void CallCounter::recordDelete() { ++_deletes;}
  55 size_t CallCounter::news() const {return _news;}
  56 size_t CallCounter::deletes() const {return _deletes;}
  57
  58 class BaseVirtual
  59 {
  60 public:
  61     void *operator new (size_t);
  62     void operator delete (void *);
  63     virtual ~BaseVirtual();
  64     static void DeleteABase(BaseVirtual *aBase);
  65     static CallCounter Calls;
  66 };
  67
  68 CallCounter BaseVirtual::Calls;
  69
  70 void *
  71 BaseVirtual::operator new(size_t byteCount)
  72 {
  73     Calls.recordNew();
  74     return ::operator new (byteCount);
  75 }
  76
  77 void
  78 BaseVirtual::operator delete(void *address)
  79 {
  80     Calls.recordDelete();
  81     ::operator delete (address);
  82 }
  83
  84 void
  85 BaseVirtual::DeleteABase(BaseVirtual *aBase)
  86 {
  87     delete aBase;
  88 }
  89
  90 BaseVirtual::~BaseVirtual() {}
  91
  92 class ChildVirtual : public BaseVirtual
  93 {
  94 public:
  95     void *operator new (size_t);
  96     void operator delete (void *);
  97     virtual ~ChildVirtual();
  98     static CallCounter Calls;
  99 };
 100
 101 CallCounter ChildVirtual::Calls;
 102
 103 void *
 104 ChildVirtual::operator new(size_t byteCount)
 105 {
 106     Calls.recordNew();
 107     return ::operator new (byteCount);
 108 }
 109
 110 void
 111 ChildVirtual::operator delete(void *address)
 112 {
 113     Calls.recordDelete();
 114     ::operator delete (address);
 115 }
 116
 117 ChildVirtual::~ChildVirtual() {}
 118
 119 int
 120 main(int argc, char **argv)
 121 {
 122     assert (BaseVirtual::Calls.news() == 0);
 123     assert (BaseVirtual::Calls.deletes() == 0);
 124     assert (ChildVirtual::Calls.news() == 0);
 125     assert (ChildVirtual::Calls.deletes() == 0);
 126     BaseVirtual *aBase = new ChildVirtual;
 127     assert (BaseVirtual::Calls.news() == 0);
 128     assert (BaseVirtual::Calls.deletes() == 0);
 129     assert (ChildVirtual::Calls.news() == 1);
 130     assert (ChildVirtual::Calls.deletes() == 0);
 131     BaseVirtual::DeleteABase(aBase);
 132     assert (BaseVirtual::Calls.news() == 0);
 133     assert (BaseVirtual::Calls.deletes() == 0);
 134     assert (ChildVirtual::Calls.news() == 1);
 135     assert (ChildVirtual::Calls.deletes() == 1);
 136     // deleting NULL works.
 137     BaseVirtual::DeleteABase(NULL);
 138     assert (BaseVirtual::Calls.news() == 0);
 139     assert (BaseVirtual::Calls.deletes() == 0);
 140     assert (ChildVirtual::Calls.news() == 1);
 141     assert (ChildVirtual::Calls.deletes() == 1);
 142     return 0;
 143 }