libstdc++-v3/testsuite/tr1/2_general_utilities/memory/shared_ptr/assign/assign.cc

   1 // Copyright (C) 2005 Free Software Foundation
   2 //
   3 // This file is part of the GNU ISO C++ Library.  This library is free
   4 // software; you can redistribute it and/or modify it under the
   5 // terms of the GNU General Public License as published by the
   6 // Free Software Foundation; either version 2, or (at your option)
   7 // any later version.
   8
   9 // This library is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13
  14 // You should have received a copy of the GNU General Public License along
  15 // with this library; see the file COPYING.  If not, write to the Free
  16 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  17 // USA.
  18
  19 // TR1 2.2.2 Template class shared_ptr [tr.util.smartptr.shared]
  20
  21 #include <tr1/memory>
  22 #include <testsuite_hooks.h>
  23
  24 struct A
  25 {
  26   A() { ++ctor_count; }
  27   virtual ~A() { ++dtor_count; }
  28   static long ctor_count;
  29   static long dtor_count;
  30 };
  31 long A::ctor_count = 0;
  32 long A::dtor_count = 0;
  33
  34 struct reset_count_struct
  35 {
  36   ~reset_count_struct()
  37   {
  38     A::ctor_count = 0;
  39     A::dtor_count = 0;
  40   }
  41 };
  42
  43
  44 // 2.2.3.3 shared_ptr assignment [tr.util.smartptr.shared.assign]
  45
  46 // Assignment from shared_ptr<Y>
  47 void
  48 test01()
  49 {
  50   reset_count_struct __attribute__((unused)) reset;
  51   bool test __attribute__((unused)) = true;
  52
  53   std::tr1::shared_ptr<A> a;
  54
  55   a = std::tr1::shared_ptr<A>(new A);
  56   VERIFY( a.get() != 0 );
  57   VERIFY( A::ctor_count == 1 );
  58   VERIFY( A::dtor_count == 0 );
  59
  60   a = std::tr1::shared_ptr<A>();
  61   VERIFY( a.get() == 0 );
  62   VERIFY( A::ctor_count == 1 );
  63   VERIFY( A::dtor_count == 1 );
  64 }
  65
  66 int
  67 main()
  68 {
  69   test01();
  70   return 0;
  71 }