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

   1 // { dg-options "-std=gnu++0x" }
   2
   3 // Copyright (C) 2005, 2006, 2007 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 2, 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 COPYING.  If not, write to the Free
  18 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  19 // USA.
  20
  21 // 20.6.6.2 Template class shared_ptr [util.smartptr.shared]
  22
  23 #include <memory>
  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 void deleter(A* p) { delete p; }
  47
  48 struct reset_count_struct
  49 {
  50   ~reset_count_struct()
  51   {
  52     A::ctor_count = 0;
  53     A::dtor_count = 0;
  54     B::ctor_count = 0;
  55     B::dtor_count = 0;
  56   }
  57 };
  58
  59 // 20.6.6.2.1 shared_ptr constructors [util.smartptr.shared.const]
  60
  61 // Copy construction
  62 int test01()
  63 {
  64   reset_count_struct __attribute__((unused)) reset;
  65   bool test __attribute__((unused)) = true;
  66
  67   std::shared_ptr<A> a1;
  68   std::shared_ptr<A> a2(a1);
  69   VERIFY( a2.use_count() == 0 );
  70   VERIFY( A::ctor_count == 0 );
  71   VERIFY( A::dtor_count == 0 );
  72   VERIFY( B::ctor_count == 0 );
  73   VERIFY( B::dtor_count == 0 );
  74
  75   return 0;
  76 }
  77
  78 int
  79 test02()
  80 {
  81   reset_count_struct __attribute__((unused)) reset;
  82   bool test __attribute__((unused)) = true;
  83
  84   std::shared_ptr<A> a1(new A);
  85   std::shared_ptr<A> a2(a1);
  86   VERIFY( a2.use_count() == 2 );
  87   VERIFY( A::ctor_count == 1 );
  88   VERIFY( A::dtor_count == 0 );
  89   VERIFY( B::ctor_count == 0 );
  90   VERIFY( B::dtor_count == 0 );
  91
  92   return 0;
  93 }
  94
  95 int
  96 test03()
  97 {
  98   reset_count_struct __attribute__((unused)) reset;
  99   bool test __attribute__((unused)) = true;
 100
 101   std::shared_ptr<B> b(new B);
 102   std::shared_ptr<A> a(b);
 103   VERIFY( a.use_count() == 2 );
 104   VERIFY( A::ctor_count == 1 );
 105   VERIFY( A::dtor_count == 0 );
 106   VERIFY( B::ctor_count == 1 );
 107   VERIFY( B::dtor_count == 0 );
 108
 109   return 0;
 110 }
 111
 112 int
 113 test04()
 114 {
 115   reset_count_struct __attribute__((unused)) reset;
 116   bool test __attribute__((unused)) = true;
 117
 118   std::shared_ptr<B> b(new B, &deleter);
 119   std::shared_ptr<A> a(b);
 120   VERIFY( a.use_count() == 2 );
 121   VERIFY( A::ctor_count == 1 );
 122   VERIFY( A::dtor_count == 0 );
 123   VERIFY( B::ctor_count == 1 );
 124   VERIFY( B::dtor_count == 0 );
 125
 126   return 0;
 127 }
 128
 129 int
 130 main()
 131 {
 132   test01();
 133   test02();
 134   test03();
 135   test04();
 136   return 0;
 137 }