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

   1 // { dg-do run { target c++11 } }
   2
   3 // Copyright (C) 2005-2019 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 // 20.6.6.2 Template class shared_ptr [util.smartptr.shared]
  21
  22 #include <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 B : A
  36 {
  37   B() { ++ctor_count; }
  38   virtual ~B() { ++dtor_count; }
  39   static long ctor_count;
  40   static long dtor_count;
  41 };
  42 long B::ctor_count = 0;
  43 long B::dtor_count = 0;
  44
  45 void deleter(A* p) { delete p; }
  46
  47 struct reset_count_struct
  48 {
  49   ~reset_count_struct()
  50   {
  51     A::ctor_count = 0;
  52     A::dtor_count = 0;
  53     B::ctor_count = 0;
  54     B::dtor_count = 0;
  55   }
  56 };
  57
  58 // 20.6.6.2.1 shared_ptr constructors [util.smartptr.shared.const]
  59
  60 // Copy construction
  61 int test01()
  62 {
  63   reset_count_struct __attribute__((unused)) reset;
  64
  65   std::shared_ptr<A> a1;
  66   std::shared_ptr<A> a2(a1);
  67   VERIFY( a2.use_count() == 0 );
  68   VERIFY( A::ctor_count == 0 );
  69   VERIFY( A::dtor_count == 0 );
  70   VERIFY( B::ctor_count == 0 );
  71   VERIFY( B::dtor_count == 0 );
  72
  73   return 0;
  74 }
  75
  76 int
  77 test02()
  78 {
  79   reset_count_struct __attribute__((unused)) reset;
  80
  81   std::shared_ptr<A> a1(new A);
  82   std::shared_ptr<A> a2(a1);
  83   VERIFY( a2.use_count() == 2 );
  84   VERIFY( A::ctor_count == 1 );
  85   VERIFY( A::dtor_count == 0 );
  86   VERIFY( B::ctor_count == 0 );
  87   VERIFY( B::dtor_count == 0 );
  88
  89   return 0;
  90 }
  91
  92 int
  93 test03()
  94 {
  95   reset_count_struct __attribute__((unused)) reset;
  96
  97   std::shared_ptr<B> b(new B);
  98   std::shared_ptr<A> a(b);
  99   VERIFY( a.use_count() == 2 );
 100   VERIFY( A::ctor_count == 1 );
 101   VERIFY( A::dtor_count == 0 );
 102   VERIFY( B::ctor_count == 1 );
 103   VERIFY( B::dtor_count == 0 );
 104
 105   return 0;
 106 }
 107
 108 int
 109 test04()
 110 {
 111   reset_count_struct __attribute__((unused)) reset;
 112
 113   std::shared_ptr<B> b(new B, &deleter);
 114   std::shared_ptr<A> a(b);
 115   VERIFY( a.use_count() == 2 );
 116   VERIFY( A::ctor_count == 1 );
 117   VERIFY( A::dtor_count == 0 );
 118   VERIFY( B::ctor_count == 1 );
 119   VERIFY( B::dtor_count == 0 );
 120
 121   return 0;
 122 }
 123
 124 int
 125 main()
 126 {
 127   test01();
 128   test02();
 129   test03();
 130   test04();
 131   return 0;
 132 }