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

   1 // { dg-options "-std=gnu++0x" }
   2
   3 // Copyright (C) 2005, 2006, 2007, 2009 Free Software Foundation
   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   bool test __attribute__((unused)) = true;
  65
  66   std::shared_ptr<A> a1;
  67   std::shared_ptr<A> a2(a1);
  68   VERIFY( a2.use_count() == 0 );
  69   VERIFY( A::ctor_count == 0 );
  70   VERIFY( A::dtor_count == 0 );
  71   VERIFY( B::ctor_count == 0 );
  72   VERIFY( B::dtor_count == 0 );
  73
  74   return 0;
  75 }
  76
  77 int
  78 test02()
  79 {
  80   reset_count_struct __attribute__((unused)) reset;
  81   bool test __attribute__((unused)) = true;
  82
  83   std::shared_ptr<A> a1(new A);
  84   std::shared_ptr<A> a2(a1);
  85   VERIFY( a2.use_count() == 2 );
  86   VERIFY( A::ctor_count == 1 );
  87   VERIFY( A::dtor_count == 0 );
  88   VERIFY( B::ctor_count == 0 );
  89   VERIFY( B::dtor_count == 0 );
  90
  91   return 0;
  92 }
  93
  94 int
  95 test03()
  96 {
  97   reset_count_struct __attribute__((unused)) reset;
  98   bool test __attribute__((unused)) = true;
  99
 100   std::shared_ptr<B> b(new B);
 101   std::shared_ptr<A> a(b);
 102   VERIFY( a.use_count() == 2 );
 103   VERIFY( A::ctor_count == 1 );
 104   VERIFY( A::dtor_count == 0 );
 105   VERIFY( B::ctor_count == 1 );
 106   VERIFY( B::dtor_count == 0 );
 107
 108   return 0;
 109 }
 110
 111 int
 112 test04()
 113 {
 114   reset_count_struct __attribute__((unused)) reset;
 115   bool test __attribute__((unused)) = true;
 116
 117   std::shared_ptr<B> b(new B, &deleter);
 118   std::shared_ptr<A> a(b);
 119   VERIFY( a.use_count() == 2 );
 120   VERIFY( A::ctor_count == 1 );
 121   VERIFY( A::dtor_count == 0 );
 122   VERIFY( B::ctor_count == 1 );
 123   VERIFY( B::dtor_count == 0 );
 124
 125   return 0;
 126 }
 127
 128 int
 129 main()
 130 {
 131   test01();
 132   test02();
 133   test03();
 134   test04();
 135   return 0;
 136 }