libstdc++-v3/testsuite/tr1/2_general_utilities/shared_ptr/cons/copy.cc

   1 // Copyright (C) 2005-2020 Free Software Foundation, Inc.
   2 //
   3 // This file is part of the GNU ISO C++ Library.  This library is free
   4 // software; you can redistribute it and/or modify it under the
   5 // terms of the GNU General Public License as published by the
   6 // Free Software Foundation; either version 3, or (at your option)
   7 // any later version.
   8
   9 // This library is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13
  14 // You should have received a copy of the GNU General Public License along
  15 // with this library; see the file COPYING3.  If not see
  16 // <http://www.gnu.org/licenses/>.
  17
  18 // TR1 2.2.2 Template class shared_ptr [tr.util.smartptr.shared]
  19
  20 #include <tr1/memory>
  21 #include <testsuite_hooks.h>
  22
  23 struct A
  24 {
  25   A() { ++ctor_count; }
  26   virtual ~A() { ++dtor_count; }
  27   static long ctor_count;
  28   static long dtor_count;
  29 };
  30 long A::ctor_count = 0;
  31 long A::dtor_count = 0;
  32
  33 struct B : A
  34 {
  35   B() { ++ctor_count; }
  36   virtual ~B() { ++dtor_count; }
  37   static long ctor_count;
  38   static long dtor_count;
  39 };
  40 long B::ctor_count = 0;
  41 long B::dtor_count = 0;
  42
  43 void deleter(A* p) { delete p; }
  44
  45 struct reset_count_struct
  46 {
  47   ~reset_count_struct()
  48   {
  49     A::ctor_count = 0;
  50     A::dtor_count = 0;
  51     B::ctor_count = 0;
  52     B::dtor_count = 0;
  53   }
  54 };
  55
  56 // 2.2.3.1 shared_ptr constructors [tr.util.smartptr.shared.const]
  57
  58 // Copy construction
  59 int test01()
  60 {
  61   reset_count_struct __attribute__((unused)) reset;
  62
  63   std::tr1::shared_ptr<A> a1;
  64   std::tr1::shared_ptr<A> a2(a1);
  65   VERIFY( a2.use_count() == 0 );
  66   VERIFY( A::ctor_count == 0 );
  67   VERIFY( A::dtor_count == 0 );
  68   VERIFY( B::ctor_count == 0 );
  69   VERIFY( B::dtor_count == 0 );
  70
  71   return 0;
  72 }
  73
  74 int
  75 test02()
  76 {
  77   reset_count_struct __attribute__((unused)) reset;
  78
  79   std::tr1::shared_ptr<A> a1(new A);
  80   std::tr1::shared_ptr<A> a2(a1);
  81   VERIFY( a2.use_count() == 2 );
  82   VERIFY( A::ctor_count == 1 );
  83   VERIFY( A::dtor_count == 0 );
  84   VERIFY( B::ctor_count == 0 );
  85   VERIFY( B::dtor_count == 0 );
  86
  87   return 0;
  88 }
  89
  90 int
  91 test03()
  92 {
  93   reset_count_struct __attribute__((unused)) reset;
  94
  95   std::tr1::shared_ptr<B> b(new B);
  96   std::tr1::shared_ptr<A> a(b);
  97   VERIFY( a.use_count() == 2 );
  98   VERIFY( A::ctor_count == 1 );
  99   VERIFY( A::dtor_count == 0 );
 100   VERIFY( B::ctor_count == 1 );
 101   VERIFY( B::dtor_count == 0 );
 102
 103   return 0;
 104 }
 105
 106 int
 107 test04()
 108 {
 109   reset_count_struct __attribute__((unused)) reset;
 110
 111   std::tr1::shared_ptr<B> b(new B, &deleter);
 112   std::tr1::shared_ptr<A> a(b);
 113   VERIFY( a.use_count() == 2 );
 114   VERIFY( A::ctor_count == 1 );
 115   VERIFY( A::dtor_count == 0 );
 116   VERIFY( B::ctor_count == 1 );
 117   VERIFY( B::dtor_count == 0 );
 118
 119   return 0;
 120 }
 121
 122 int
 123 main()
 124 {
 125   test01();
 126   test02();
 127   test03();
 128   test04();
 129   return 0;
 130 }