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// -*- C++ -*-

// Utilities for testing threads for the C++ library testsuite.

//

// Copyright (C) 2009 Free Software Foundation, Inc.

//

// 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/>.

//

#ifndef _GLIBCXX_TESTSUITE_THREAD_H

#define _GLIBCXX_TESTSUITE_THREAD_H

#include <sstream>

#include <stdexcept>

#include <type_traits>

// C++0x only.

namespace __gnu_test

{

  // Assume _Tp::native_handle_type.

  // Check C++ to native_handle_type characteristics: size and alignment.

  template<typename _Tp>

    void

    compare_type_to_native_type()

    {

      typedef _Tp test_type;

      // Remove possible pointer type.

      typedef typename test_type::native_handle_type native_handle;

      typedef typename std::remove_pointer<native_handle>::type native_type;

      int st = sizeof(test_type);

      int snt = sizeof(native_type);

      int at = __alignof__(test_type);

      int ant = __alignof__(native_type);

      if (st != snt || at != ant)

        {

          std::ostringstream s;

          s << std::endl;

          s << "size of _Tp: " << st << std::endl;

          s << "alignment of _Tp: " << st << std::endl;

          s << "size of *(_Tp::native_handle_type): " << snt << std::endl;

          s << "alignment of *(_Tp::native_handle_type): " << snt << std::endl;

          throw std::runtime_error(s.str());

        }

    }

} // namespace __gnu_test

#endif // _GLIBCXX_TESTSUITE_THREAD_H