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// { dg-options "-std=gnu++0x" }

// Copyright (C) 2010 Free Software Foundation

//

// This file is part of the GNU ISO C++ Library.  This library is free

// software; you can redistribute it and/or modify it under the

// terms of the GNU General Public License as published by the

// Free Software Foundation; either version 3, or (at your option)

// any later version.

// This library is distributed in the hope that it will be useful,

// but WITHOUT ANY WARRANTY; without even the implied warranty of

// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License along

// with this library; see the file COPYING3.  If not see

// <http://www.gnu.org/licenses/>.

// 20.9.11.2 Class template shared_ptr [util.smartptr.shared]

#include <memory>

#include <cstddef>

#include <testsuite_hooks.h>

#include <testsuite_allocator.h>

// 20.9.11.2.1 shared_ptr constructors [util.smartptr.shared.const]

// Construction from nullptr

struct deleter

{

  int count;

  deleter() : count(0) { }

  void operator()(std::nullptr_t) { ++count; }

  void operator()(int*) const { throw "wrong type passed to deleter"; }

};

void

test01()

{

  bool test __attribute__((unused)) = true;

  std::shared_ptr<int> p = nullptr;

  VERIFY( p.get() == nullptr );

  VERIFY( p.use_count() == 0 );

}

void

test02()

{

  bool test __attribute__((unused)) = true;

  deleter d;

  std::shared_ptr<int> p(nullptr, std::ref(d));

  VERIFY( p.get() == nullptr );

  VERIFY( p.use_count() == 1 );

  p = nullptr;

  VERIFY( p.use_count() == 0 );

  VERIFY( d.count == 1 );

}

void

test03()

{

  bool test __attribute__((unused)) = true;

  deleter d;

  __gnu_test::tracker_allocator<int> a;

  std::shared_ptr<int> p(nullptr, std::ref(d), a);

  VERIFY( p.get() == nullptr );

  VERIFY( p.use_count() == 1 );

  p = nullptr;

  VERIFY( p.use_count() == 0 );

  VERIFY( d.count == 1 );

  typedef __gnu_test::tracker_allocator_counter c;

  VERIFY( c::get_destruct_count() == c::get_construct_count() );

  VERIFY( c::get_deallocation_count() == c::get_allocation_count() );

}

int

main()

{

  test01();

  test02();

  test03();

  return 0;

}