multithread_info.h

// ---------------------------------------------------------------------
//
// Copyright (C) 2000 - 2018 by the deal.II authors
//
// This file is part of the deal.II library.
//
// The deal.II library is free software; you can use it, redistribute
// it, and/or modify it under the terms of the GNU Lesser General
// Public License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
// The full text of the license can be found in the file LICENSE.md at
// the top level directory of deal.II.
//
// ---------------------------------------------------------------------

#ifndef dealii_multithread_info_h
#  define dealii_multithread_info_h
//---------------------------------------------------------------------------


#  include <deal.II/base/config.h>

#  include <deal.II/base/exceptions.h>
#  include <deal.II/base/types.h>

DEAL_II_NAMESPACE_OPEN

class MultithreadInfo
{
public:
  MultithreadInfo() = delete;

  static unsigned int
  n_cores();

  static unsigned int
  n_threads();

  static std::size_t
  memory_consumption();

  static void
  set_thread_limit(
    const unsigned int max_threads = numbers::invalid_unsigned_int);

  static bool
  is_running_single_threaded();

  static void
  initialize_multithreading();

private:
  static unsigned int
  get_n_cpus();

  static unsigned int n_max_threads;

  static const unsigned int n_cpus;
};



//---------------------------------------------------------------------------
DEAL_II_NAMESPACE_CLOSE
// end of #ifndef dealii_multithread_info_h
#endif
//---------------------------------------------------------------------------