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

   1 // { dg-do run { target c++11 } }
   2 // { dg-require-effective-target hosted }
   3
   4 // Copyright (C) 2007-2024 Free Software Foundation, Inc.
   5 //
   6 // This file is part of the GNU ISO C++ Library.  This library is free
   7 // software; you can redistribute it and/or modify it under the
   8 // terms of the GNU General Public License as published by the
   9 // Free Software Foundation; either version 3, or (at your option)
  10 // any later version.
  11
  12 // This library is distributed in the hope that it will be useful,
  13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 // GNU General Public License for more details.
  16
  17 // You should have received a copy of the GNU General Public License along
  18 // with this library; see the file COPYING3.  If not see
  19 // <http://www.gnu.org/licenses/>.
  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(int i, double d, char c = '\0') : i(i), d(d), c(c) { ++ctor_count; }
  29   explicit A(int i) : i(i), d(), c() { ++ctor_count; }
  30   A() : i(), d(), c() { ++ctor_count; }
  31   ~A() { ++dtor_count; }
  32   int i;
  33   double d;
  34   char c;
  35   static int ctor_count;
  36   static int dtor_count;
  37 };
  38 int A::ctor_count = 0;
  39 int A::dtor_count = 0;
  40
  41 struct reset_count_struct
  42 {
  43   ~reset_count_struct()
  44   {
  45     A::ctor_count = 0;
  46     A::dtor_count = 0;
  47   }
  48 };
  49
  50 // 20.6.6.2.6 shared_ptr creation [util.smartptr.shared.create]
  51
  52 void
  53 test01()
  54 {
  55   reset_count_struct __attribute__((unused)) reset;
  56
  57   {
  58     std::shared_ptr<A> p1 = std::make_shared<A>();
  59     VERIFY( p1.get() != 0 );
  60     VERIFY( p1.use_count() == 1 );
  61     VERIFY( A::ctor_count == 1 );
  62   }
  63   VERIFY( A::ctor_count == A::dtor_count );
  64 }
  65
  66 void
  67 test02()
  68 {
  69   reset_count_struct __attribute__((unused)) reset;
  70
  71   std::shared_ptr<A> p1;
  72
  73   p1 = std::make_shared<A>(1);
  74   VERIFY( A::ctor_count == 1 );
  75
  76   p1 = std::make_shared<A>(1, 2.0);
  77   VERIFY( A::ctor_count == 2 );
  78   VERIFY( A::dtor_count == 1 );
  79
  80   p1 = std::make_shared<A>(1, 2.0, '3');
  81   VERIFY( A::ctor_count == 3 );
  82   VERIFY( A::dtor_count == 2 );
  83   VERIFY( p1->i == 1 );
  84   VERIFY( p1->d == 2.0 );
  85   VERIFY( p1->c == '3' );
  86
  87   p1 = std::shared_ptr<A>();
  88   VERIFY( A::ctor_count == A::dtor_count );
  89 }
  90
  91 int
  92 main()
  93 {
  94   test01();
  95   test02();
  96 }