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

   1 // { dg-do run { target c++11 } }
   2
   3 // Copyright (C) 2007-2016 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 // TR1 20.6.6.2 Template class shared_ptr [util.smartptr.shared]
  21
  22 #include <memory>
  23 #include <utility>
  24 #include <testsuite_hooks.h>
  25
  26 struct A
  27 {
  28   A() { ++ctor_count; }
  29   virtual ~A() { ++dtor_count; }
  30   static long ctor_count;
  31   static long dtor_count;
  32 };
  33 long A::ctor_count = 0;
  34 long A::dtor_count = 0;
  35
  36 struct B : A
  37 {
  38   B() { ++ctor_count; }
  39   virtual ~B() { ++dtor_count; }
  40   static long ctor_count;
  41   static long dtor_count;
  42 };
  43 long B::ctor_count = 0;
  44 long B::dtor_count = 0;
  45
  46 struct D
  47 {
  48   void operator()(B* p) const { delete p; ++delete_count; }
  49   static long delete_count;
  50 };
  51 long D::delete_count = 0;
  52
  53 struct reset_count_struct
  54 {
  55   ~reset_count_struct()
  56   {
  57     A::ctor_count = 0;
  58     A::dtor_count = 0;
  59     B::ctor_count = 0;
  60     B::dtor_count = 0;
  61     D::delete_count = 0;
  62   }
  63 };
  64
  65 // 20.6.6.2.1 shared_ptr constructors [util.smartptr.shared.const]
  66
  67 // Rvalue construction
  68 int test01()
  69 {
  70   reset_count_struct __attribute__((unused)) reset;
  71
  72   std::shared_ptr<A> a1;
  73   std::shared_ptr<A> a2(std::move(a1));
  74   VERIFY( a1.use_count() == 0 );
  75   VERIFY( a2.use_count() == 0 );
  76   VERIFY( A::ctor_count == 0 );
  77   VERIFY( A::dtor_count == 0 );
  78   VERIFY( B::ctor_count == 0 );
  79   VERIFY( B::dtor_count == 0 );
  80
  81   return 0;
  82 }
  83
  84 int
  85 test02()
  86 {
  87   reset_count_struct __attribute__((unused)) reset;
  88
  89   std::shared_ptr<A> a1(new A);
  90   std::shared_ptr<A> a2(std::move(a1));
  91   VERIFY( a1.use_count() == 0 );
  92   VERIFY( a2.use_count() == 1 );
  93   VERIFY( A::ctor_count == 1 );
  94   VERIFY( A::dtor_count == 0 );
  95
  96   return 0;
  97 }
  98
  99 int
 100 test03()
 101 {
 102   reset_count_struct __attribute__((unused)) reset;
 103
 104   std::shared_ptr<B> b(new B);
 105   std::shared_ptr<A> a(std::move(b));
 106   VERIFY( b.use_count() == 0 );
 107   VERIFY( a.use_count() == 1 );
 108   VERIFY( A::ctor_count == 1 );
 109   VERIFY( A::dtor_count == 0 );
 110   VERIFY( B::ctor_count == 1 );
 111   VERIFY( B::dtor_count == 0 );
 112
 113   return 0;
 114 }
 115
 116 int
 117 test04()
 118 {
 119   reset_count_struct __attribute__((unused)) reset;
 120
 121   std::shared_ptr<B> b(new B, D());
 122   std::shared_ptr<A> a(std::move(b));
 123   VERIFY( b.use_count() == 0 );
 124   VERIFY( a.use_count() == 1 );
 125   VERIFY( A::ctor_count == 1 );
 126   VERIFY( A::dtor_count == 0 );
 127   VERIFY( B::ctor_count == 1 );
 128   VERIFY( B::dtor_count == 0 );
 129
 130   a = std::move(std::shared_ptr<A>());
 131   VERIFY( D::delete_count == 1 );
 132   VERIFY( B::dtor_count == 1 );
 133
 134   return 0;
 135 }
 136
 137 int
 138 test05()
 139 {
 140   reset_count_struct __attribute__((unused)) reset;
 141
 142   std::shared_ptr<A> a(std::move(std::shared_ptr<A>(new A)));
 143   VERIFY( a.use_count() == 1 );
 144   VERIFY( A::ctor_count == 1 );
 145   VERIFY( A::dtor_count == 0 );
 146
 147   return 0;
 148 }
 149
 150 int
 151 main()
 152 {
 153   test01();
 154   test02();
 155   test03();
 156   test04();
 157   test05();
 158   return 0;
 159 }