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

   1 // Copyright (C) 2005-2021 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   ~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   ~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 struct D
  44 {
  45   void operator()(const B* p) { delete p; ++delete_count; }
  46   static long delete_count;
  47 };
  48 long D::delete_count = 0;
  49
  50 struct reset_count_struct
  51 {
  52   ~reset_count_struct()
  53   {
  54     A::ctor_count = 0;
  55     A::dtor_count = 0;
  56     B::ctor_count = 0;
  57     B::dtor_count = 0;
  58     D::delete_count = 0;
  59   }
  60 };
  61
  62
  63 // 2.2.3.2 shared_ptr destructor [tr.util.smartptr.shared.dest]
  64
  65 // empty shared_ptr
  66 int
  67 test01()
  68 {
  69   reset_count_struct __attribute__((unused)) reset;
  70
  71   {
  72     std::tr1::shared_ptr<A> a;
  73   }
  74   VERIFY( A::ctor_count == 0 );
  75   VERIFY( A::dtor_count == 0 );
  76   VERIFY( B::ctor_count == 0 );
  77   VERIFY( B::dtor_count == 0 );
  78   VERIFY( D::delete_count == 0 );
  79
  80   return 0;
  81 }
  82
  83 // shared ownership
  84 int
  85 test02()
  86 {
  87   reset_count_struct __attribute__((unused)) reset;
  88
  89   std::tr1::shared_ptr<A> a;
  90   {
  91     a = std::tr1::shared_ptr<A>(new B, D());
  92   }
  93   VERIFY( A::ctor_count == 1 );
  94   VERIFY( A::dtor_count == 0 );
  95   VERIFY( B::ctor_count == 1 );
  96   VERIFY( B::dtor_count == 0 );
  97   VERIFY( D::delete_count == 0 );
  98
  99   return 0;
 100 }
 101
 102 // exclusive ownership
 103 int
 104 test03()
 105 {
 106   reset_count_struct __attribute__((unused)) reset;
 107
 108   {
 109     std::tr1::shared_ptr<A> a1(new B);
 110     std::tr1::shared_ptr<A> a2(new B, D());
 111   }
 112   VERIFY( A::ctor_count == 2 );
 113   VERIFY( A::dtor_count == 2 );
 114   VERIFY( B::ctor_count == 2 );
 115   VERIFY( B::dtor_count == 2 );
 116   VERIFY( D::delete_count == 1 );
 117
 118   return 0;
 119 }
 120
 121
 122 int
 123 main()
 124 {
 125   test01();
 126   test02();
 127   test03();
 128   return 0;
 129 }