libstdc++-v3/testsuite/20_util/shared_ptr/cons/move.cc

   1 // { dg-do run { target c++11 } }
   2 // { dg-require-effective-target hosted }
   3
   4 // Copyright (C) 2007-2023 Free Software Foundation, Inc.
   5 //
   6 // This file is part of the GNU ISO C++ Library.  This library is free
   7 // software; you can redistribute it and/or modify it under the
   8 // terms of the GNU General Public License as published by the
   9 // Free Software Foundation; either version 3, or (at your option)
  10 // any later version.
  11
  12 // This library is distributed in the hope that it will be useful,
  13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 // GNU General Public License for more details.
  16
  17 // You should have received a copy of the GNU General Public License along
  18 // with this library; see the file COPYING3.  If not see
  19 // <http://www.gnu.org/licenses/>.
  20
  21 // TR1 20.6.6.2 Template class shared_ptr [util.smartptr.shared]
  22
  23 #include <memory>
  24 #include <utility>
  25 #include <testsuite_hooks.h>
  26
  27 struct A
  28 {
  29   A() { ++ctor_count; }
  30   virtual ~A() { ++dtor_count; }
  31   static long ctor_count;
  32   static long dtor_count;
  33 };
  34 long A::ctor_count = 0;
  35 long A::dtor_count = 0;
  36
  37 struct B : A
  38 {
  39   B() { ++ctor_count; }
  40   virtual ~B() { ++dtor_count; }
  41   static long ctor_count;
  42   static long dtor_count;
  43 };
  44 long B::ctor_count = 0;
  45 long B::dtor_count = 0;
  46
  47 struct D
  48 {
  49   void operator()(B* p) const { delete p; ++delete_count; }
  50   static long delete_count;
  51 };
  52 long D::delete_count = 0;
  53
  54 struct reset_count_struct
  55 {
  56   ~reset_count_struct()
  57   {
  58     A::ctor_count = 0;
  59     A::dtor_count = 0;
  60     B::ctor_count = 0;
  61     B::dtor_count = 0;
  62     D::delete_count = 0;
  63   }
  64 };
  65
  66 // 20.6.6.2.1 shared_ptr constructors [util.smartptr.shared.const]
  67
  68 // Rvalue construction
  69 int test01()
  70 {
  71   reset_count_struct __attribute__((unused)) reset;
  72
  73   std::shared_ptr<A> a1;
  74   std::shared_ptr<A> a2(std::move(a1));
  75   VERIFY( a1.use_count() == 0 );
  76   VERIFY( a2.use_count() == 0 );
  77   VERIFY( A::ctor_count == 0 );
  78   VERIFY( A::dtor_count == 0 );
  79   VERIFY( B::ctor_count == 0 );
  80   VERIFY( B::dtor_count == 0 );
  81
  82   return 0;
  83 }
  84
  85 int
  86 test02()
  87 {
  88   reset_count_struct __attribute__((unused)) reset;
  89
  90   std::shared_ptr<A> a1(new A);
  91   std::shared_ptr<A> a2(std::move(a1));
  92   VERIFY( a1.use_count() == 0 );
  93   VERIFY( a2.use_count() == 1 );
  94   VERIFY( A::ctor_count == 1 );
  95   VERIFY( A::dtor_count == 0 );
  96
  97   return 0;
  98 }
  99
 100 int
 101 test03()
 102 {
 103   reset_count_struct __attribute__((unused)) reset;
 104
 105   std::shared_ptr<B> b(new B);
 106   std::shared_ptr<A> a(std::move(b));
 107   VERIFY( b.use_count() == 0 );
 108   VERIFY( a.use_count() == 1 );
 109   VERIFY( A::ctor_count == 1 );
 110   VERIFY( A::dtor_count == 0 );
 111   VERIFY( B::ctor_count == 1 );
 112   VERIFY( B::dtor_count == 0 );
 113
 114   return 0;
 115 }
 116
 117 int
 118 test04()
 119 {
 120   reset_count_struct __attribute__((unused)) reset;
 121
 122   std::shared_ptr<B> b(new B, D());
 123   std::shared_ptr<A> a(std::move(b));
 124   VERIFY( b.use_count() == 0 );
 125   VERIFY( a.use_count() == 1 );
 126   VERIFY( A::ctor_count == 1 );
 127   VERIFY( A::dtor_count == 0 );
 128   VERIFY( B::ctor_count == 1 );
 129   VERIFY( B::dtor_count == 0 );
 130
 131   a = std::move(std::shared_ptr<A>());
 132   VERIFY( D::delete_count == 1 );
 133   VERIFY( B::dtor_count == 1 );
 134
 135   return 0;
 136 }
 137
 138 int
 139 test05()
 140 {
 141   reset_count_struct __attribute__((unused)) reset;
 142
 143   std::shared_ptr<A> a(std::move(std::shared_ptr<A>(new A)));
 144   VERIFY( a.use_count() == 1 );
 145   VERIFY( A::ctor_count == 1 );
 146   VERIFY( A::dtor_count == 0 );
 147
 148   return 0;
 149 }
 150
 151 int
 152 main()
 153 {
 154   test01();
 155   test02();
 156   test03();
 157   test04();
 158   test05();
 159   return 0;
 160 }