libstdc++-v3/testsuite/experimental/memory/shared_ptr/cons/copy_ctor.cc

   1 // { dg-do run { target c++14 } }
   2
   3 // Copyright (C) 2015-2024 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 3, or (at your option)
   9 // any later version.
  10
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15
  16 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING3.  If not see
  18 // <http://www.gnu.org/licenses/>.
  19
  20 // 8.2.1 Class template shared_ptr [memory.smartptr.shared]
  21
  22 #include <experimental/memory>
  23 #include <testsuite_hooks.h>
  24
  25 struct A
  26 {
  27   A() { ++ctor_count; }
  28   virtual ~A() { ++dtor_count; }
  29   static long ctor_count;
  30   static long dtor_count;
  31 };
  32 long A::ctor_count = 0;
  33 long A::dtor_count = 0;
  34
  35 struct B : A
  36 {
  37   B() { ++ctor_count; }
  38   virtual ~B() { ++dtor_count; }
  39   static long ctor_count;
  40   static long dtor_count;
  41 };
  42 long B::ctor_count = 0;
  43 long B::dtor_count = 0;
  44
  45 void deleter(A* p) { delete [] p; }
  46
  47 struct reset_count_struct
  48 {
  49   ~reset_count_struct()
  50     {
  51       A::ctor_count = 0;
  52       A::dtor_count = 0;
  53       B::ctor_count = 0;
  54       B::dtor_count = 0;
  55     }
  56 };
  57
  58 // 8.2.1.1 shared_ptr constructors [memory.smartptr.shared.const]
  59
  60 // Copy construction
  61
  62 int
  63 test01()
  64 {
  65   reset_count_struct __attribute__((unused)) reset;
  66
  67   std::experimental::shared_ptr<A[5]> a1;
  68   std::experimental::shared_ptr<A[5]> a2(a1);
  69   VERIFY( a2.use_count() == 0 );
  70   VERIFY( A::ctor_count == 0 );
  71   VERIFY( A::dtor_count == 0 );
  72   VERIFY( B::ctor_count == 0 );
  73   VERIFY( B::dtor_count == 0 );
  74
  75   return 0;
  76 }
  77
  78 int
  79 test02()
  80 {
  81   reset_count_struct __attribute__((unused)) reset;
  82
  83   std::experimental::shared_ptr<A[5]> a1(new A[5]);
  84   std::experimental::shared_ptr<A[5]> a2(a1);
  85   VERIFY( a2.use_count() == 2 );
  86   VERIFY( A::ctor_count == 5 );
  87   VERIFY( A::dtor_count == 0 );
  88   VERIFY( B::ctor_count == 0 );
  89   VERIFY( B::dtor_count == 0 );
  90
  91   return 0;
  92 }
  93
  94 int
  95 test03()
  96 {
  97   reset_count_struct __attribute__((unused)) reset;
  98
  99   std::experimental::shared_ptr<A[5]> a1(new A[5], &deleter);
 100   std::experimental::shared_ptr<A[5]> a2(a1);
 101   VERIFY( a2.use_count() == 2 );
 102   VERIFY( A::ctor_count == 5 );
 103   VERIFY( A::dtor_count == 0 );
 104   VERIFY( B::ctor_count == 0 );
 105   VERIFY( B::dtor_count == 0 );
 106
 107   return 0;
 108 }
 109
 110 int
 111 test04()
 112 {
 113   reset_count_struct __attribute__((unused)) reset;
 114
 115   std::experimental::shared_ptr<A[5]> a1(std::experimental::shared_ptr<A[5]>
 116                                           (new A[5]));
 117   VERIFY( a1.use_count() == 1 );
 118   VERIFY( A::ctor_count == 5 );
 119   VERIFY( A::dtor_count == 0 );
 120   VERIFY( B::ctor_count == 0 );
 121   VERIFY( B::dtor_count == 0 );
 122
 123   return 0;
 124 }
 125
 126 int
 127 test05()
 128 {
 129   reset_count_struct __attribute__((unused)) reset;
 130
 131   std::experimental::shared_ptr<A[5]> a1(new A[5]);
 132   std::experimental::shared_ptr<A[]> a2(a1);
 133
 134   VERIFY( a2.use_count() == 2 );
 135   VERIFY( a2.get() == a1.get() );
 136   VERIFY( A::ctor_count == 5 );
 137   VERIFY( A::dtor_count == 0 );
 138   VERIFY( B::ctor_count == 0 );
 139   VERIFY( B::dtor_count == 0 );
 140
 141   return 0;
 142 }
 143
 144 int
 145 test06()
 146 {
 147   reset_count_struct __attribute__((unused)) reset;
 148
 149   std::experimental::shared_ptr<B> a1(new B);
 150   std::experimental::shared_ptr<A> a2(a1);
 151
 152   VERIFY( a2.use_count() == 2 );
 153   VERIFY( a2.get() == a1.get() );
 154   VERIFY( A::ctor_count == 1 );
 155   VERIFY( A::dtor_count == 0 );
 156   VERIFY( B::ctor_count == 1 );
 157   VERIFY( B::dtor_count == 0 );
 158
 159   return 0;
 160 }
 161
 162 int
 163 main()
 164 {
 165   test01();
 166   test02();
 167   test03();
 168   test04();
 169   test05();
 170   test06();
 171   return 0;
 172 }