libstdc++-v3/testsuite/20_util/shared_ptr/creation/make.cc

   1 // { dg-do run { target c++11 } }
   2
   3 // Copyright (C) 2007-2020 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(int i, double d, char c = '\0') : i(i), d(d), c(c) { ++ctor_count; }
  28   explicit A(int i) : i(i), d(), c() { ++ctor_count; }
  29   A() : i(), d(), c() { ++ctor_count; }
  30   ~A() { ++dtor_count; }
  31   int i;
  32   double d;
  33   char c;
  34   static int ctor_count;
  35   static int dtor_count;
  36 };
  37 int A::ctor_count = 0;
  38 int A::dtor_count = 0;
  39
  40 struct reset_count_struct
  41 {
  42   ~reset_count_struct()
  43   {
  44     A::ctor_count = 0;
  45     A::dtor_count = 0;
  46   }
  47 };
  48
  49 // 20.6.6.2.6 shared_ptr creation [util.smartptr.shared.create]
  50
  51 void
  52 test01()
  53 {
  54   reset_count_struct __attribute__((unused)) reset;
  55
  56   {
  57     std::shared_ptr<A> p1 = std::make_shared<A>();
  58     VERIFY( p1.get() != 0 );
  59     VERIFY( p1.use_count() == 1 );
  60     VERIFY( A::ctor_count == 1 );
  61   }
  62   VERIFY( A::ctor_count == A::dtor_count );
  63 }
  64
  65 void
  66 test02()
  67 {
  68   reset_count_struct __attribute__((unused)) reset;
  69
  70   std::shared_ptr<A> p1;
  71
  72   p1 = std::make_shared<A>(1);
  73   VERIFY( A::ctor_count == 1 );
  74
  75   p1 = std::make_shared<A>(1, 2.0);
  76   VERIFY( A::ctor_count == 2 );
  77   VERIFY( A::dtor_count == 1 );
  78
  79   p1 = std::make_shared<A>(1, 2.0, '3');
  80   VERIFY( A::ctor_count == 3 );
  81   VERIFY( A::dtor_count == 2 );
  82   VERIFY( p1->i == 1 );
  83   VERIFY( p1->d == 2.0 );
  84   VERIFY( p1->c == '3' );
  85
  86   p1 = std::shared_ptr<A>();
  87   VERIFY( A::ctor_count == A::dtor_count );
  88 }
  89
  90 int
  91 main()
  92 {
  93   test01();
  94   test02();
  95 }