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

   1 // { dg-do run { target c++14 } }
   2
   3 // Copyright (C) 2015-2020 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 D
  36 {
  37   void operator()(A* p) const { delete [] p; ++delete_count; }
  38   static long delete_count;
  39 };
  40 long D::delete_count = 0;
  41
  42 struct reset_count_struct
  43 {
  44   ~reset_count_struct()
  45     {
  46       A::ctor_count = 0;
  47       A::dtor_count = 0;
  48       D::delete_count = 0;
  49     }
  50 };
  51
  52 // 8.2.1.1 shared_ptr constructors [memory.smartptr.shared.const]
  53
  54 // Rvalue construction
  55 int test01()
  56 {
  57   reset_count_struct __attribute__((unused)) reset;
  58
  59   std::experimental::shared_ptr<A[5]> a1;
  60   std::experimental::shared_ptr<A[5]> a2(std::move(a1));
  61   VERIFY( a1.use_count() == 0 );
  62   VERIFY( a2.use_count() == 0 );
  63   VERIFY( A::ctor_count == 0 );
  64   VERIFY( A::dtor_count == 0 );
  65
  66   return 0;
  67 }
  68
  69 int
  70 test02()
  71 {
  72   reset_count_struct __attribute__((unused)) reset;
  73
  74   std::experimental::shared_ptr<A[5]> a1(new A[5]);
  75   std::experimental::shared_ptr<A[5]> a2(std::move(a1));
  76   VERIFY( a2.use_count() == 1 );
  77   VERIFY( A::ctor_count == 5 );
  78   VERIFY( A::dtor_count == 0 );
  79
  80   return 0;
  81 }
  82
  83 int
  84 test03()
  85 {
  86   reset_count_struct __attribute__((unused)) reset;
  87
  88   std::experimental::shared_ptr<A[5]> b(new A[5], D());
  89   std::experimental::shared_ptr<A[5]> b1(std::move(b));
  90   VERIFY( b.use_count() == 0 );
  91   VERIFY( b1.use_count() == 1 );
  92   VERIFY( A::ctor_count == 5 );
  93   VERIFY( A::dtor_count == 0 );
  94
  95   b1 = std::move(std::experimental::shared_ptr<A[5]> ());
  96
  97   VERIFY( A::ctor_count == 5 );
  98   VERIFY( A::dtor_count == 5 );
  99   VERIFY( D::delete_count == 1 );
 100
 101   return 0;
 102 }
 103
 104 void
 105 test04()
 106 {
 107   reset_count_struct __attribute__((unused)) reset;
 108
 109   std::experimental::shared_ptr<A[5]> a(std::move(std::experimental
 110                                         ::shared_ptr<A[5]>
 111                                         (new A[5])));
 112
 113   VERIFY( a.use_count() == 1 );
 114   VERIFY( A::ctor_count == 5 );
 115   VERIFY( A::dtor_count == 0 );
 116 }
 117
 118 void
 119 test05()
 120 {
 121   reset_count_struct __attribute__((unused)) reset;
 122
 123   std::experimental::shared_ptr<A[]> a(std::move(std::experimental
 124                                         ::shared_ptr<A[5]>
 125                                         (new A[5])));
 126
 127   VERIFY( a.use_count() == 1 );
 128   VERIFY( A::ctor_count == 5 );
 129   VERIFY( A::dtor_count == 0 );
 130 }
 131
 132 int
 133 main()
 134 {
 135   test01();
 136   test02();
 137   test03();
 138   test04();
 139   test05();
 140   return 0;
 141 }