libstdc++-v3/testsuite/20_util/shared_ptr/dest/dest.cc

   1 // { dg-options "-std=gnu++0x" }
   2
   3 // Copyright (C) 2005-2014 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 // 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   ~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   ~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 struct D
  46 {
  47   void operator()(const B* p) { delete p; ++delete_count; }
  48   static long delete_count;
  49 };
  50 long D::delete_count = 0;
  51
  52 struct reset_count_struct
  53 {
  54   ~reset_count_struct()
  55   {
  56     A::ctor_count = 0;
  57     A::dtor_count = 0;
  58     B::ctor_count = 0;
  59     B::dtor_count = 0;
  60     D::delete_count = 0;
  61   }
  62 };
  63
  64
  65 // 20.6.6.2.2 shared_ptr destructor [util.smartptr.shared.dest]
  66
  67 // empty shared_ptr
  68 int
  69 test01()
  70 {
  71   reset_count_struct __attribute__((unused)) reset;
  72   bool test __attribute__((unused)) = true;
  73
  74   {
  75     std::shared_ptr<A> a;
  76   }
  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   VERIFY( D::delete_count == 0 );
  82
  83   return 0;
  84 }
  85
  86 // shared ownership
  87 int
  88 test02()
  89 {
  90   reset_count_struct __attribute__((unused)) reset;
  91   bool test __attribute__((unused)) = true;
  92
  93   std::shared_ptr<A> a;
  94   {
  95     a = std::shared_ptr<A>(new B, D());
  96   }
  97   VERIFY( A::ctor_count == 1 );
  98   VERIFY( A::dtor_count == 0 );
  99   VERIFY( B::ctor_count == 1 );
 100   VERIFY( B::dtor_count == 0 );
 101   VERIFY( D::delete_count == 0 );
 102
 103   return 0;
 104 }
 105
 106 // exclusive ownership
 107 int
 108 test03()
 109 {
 110   reset_count_struct __attribute__((unused)) reset;
 111   bool test __attribute__((unused)) = true;
 112
 113   {
 114     std::shared_ptr<A> a1(new B);
 115     std::shared_ptr<A> a2(new B, D());
 116   }
 117   VERIFY( A::ctor_count == 2 );
 118   VERIFY( A::dtor_count == 2 );
 119   VERIFY( B::ctor_count == 2 );
 120   VERIFY( B::dtor_count == 2 );
 121   VERIFY( D::delete_count == 1 );
 122
 123   return 0;
 124 }
 125
 126
 127 int
 128 main()
 129 {
 130   test01();
 131   test02();
 132   test03();
 133   return 0;
 134 }