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

   1 // { dg-options "-std=gnu++0x" }
   2
   3 // Copyright (C) 2007-2014 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   bool test __attribute__((unused)) = true;
  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   bool test __attribute__((unused)) = true;
  90
  91   std::shared_ptr<A> a1(new A);
  92   std::shared_ptr<A> a2(std::move(a1));
  93   VERIFY( a1.use_count() == 0 );
  94   VERIFY( a2.use_count() == 1 );
  95   VERIFY( A::ctor_count == 1 );
  96   VERIFY( A::dtor_count == 0 );
  97
  98   return 0;
  99 }
 100
 101 int
 102 test03()
 103 {
 104   reset_count_struct __attribute__((unused)) reset;
 105   bool test __attribute__((unused)) = true;
 106
 107   std::shared_ptr<B> b(new B);
 108   std::shared_ptr<A> a(std::move(b));
 109   VERIFY( b.use_count() == 0 );
 110   VERIFY( a.use_count() == 1 );
 111   VERIFY( A::ctor_count == 1 );
 112   VERIFY( A::dtor_count == 0 );
 113   VERIFY( B::ctor_count == 1 );
 114   VERIFY( B::dtor_count == 0 );
 115
 116   return 0;
 117 }
 118
 119 int
 120 test04()
 121 {
 122   reset_count_struct __attribute__((unused)) reset;
 123   bool test __attribute__((unused)) = true;
 124
 125   std::shared_ptr<B> b(new B, D());
 126   std::shared_ptr<A> a(std::move(b));
 127   VERIFY( b.use_count() == 0 );
 128   VERIFY( a.use_count() == 1 );
 129   VERIFY( A::ctor_count == 1 );
 130   VERIFY( A::dtor_count == 0 );
 131   VERIFY( B::ctor_count == 1 );
 132   VERIFY( B::dtor_count == 0 );
 133
 134   a = std::move(std::shared_ptr<A>());
 135   VERIFY( D::delete_count == 1 );
 136   VERIFY( B::dtor_count == 1 );
 137
 138   return 0;
 139 }
 140
 141 int
 142 test05()
 143 {
 144   reset_count_struct __attribute__((unused)) reset;
 145   bool test __attribute__((unused)) = true;
 146
 147   std::shared_ptr<A> a(std::move(std::shared_ptr<A>(new A)));
 148   VERIFY( a.use_count() == 1 );
 149   VERIFY( A::ctor_count == 1 );
 150   VERIFY( A::dtor_count == 0 );
 151
 152   return 0;
 153 }
 154
 155 int
 156 main()
 157 {
 158   test01();
 159   test02();
 160   test03();
 161   test04();
 162   test05();
 163   return 0;
 164 }