threadsOMP_inl.h

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/****************************************************************************
 *   This file is part of the aGrUM/pyAgrum library.                        *
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 *   Copyright (c) 2005-2025 by                                             *
 *       - Pierre-Henri WUILLEMIN(_at_LIP6)                                 *
 *       - Christophe GONZALES(_at_AMU)                                     *
 *                                                                          *
 *   The aGrUM/pyAgrum library is free software; you can redistribute it    *
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 *    - the MIT license (MIT),                                              *
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 *   SPDX-FileCopyrightText: Copyright 2005-2025                            *
 *       - Pierre-Henri WUILLEMIN(_at_LIP6)                                 *
 *       - Christophe GONZALES(_at_AMU)                                     *
 *   SPDX-License-Identifier: LGPL-3.0-or-later OR MIT                      *
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 *   Contact  : info_at_agrum_dot_org                                       *
 *   homepage : http://agrum.gitlab.io                                      *
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#pragma once
 

 
// to ease automatic parsers
#include <agrum/agrum.h>
 
#include <agrum/base/core/threads/threadsOMP.h>
 
namespace gum {
 
  namespace threadsOMP {
 
    INLINE bool hasOMPSupport() {
#ifdef _OPENMP
      return true;
#else
      return false;
#endif
    }
 
    INLINE unsigned int getMaxNumberOfThreads() {
#ifdef _OPENMP
      return omp_get_max_threads();
#else
      return 1;
#endif
    }
 
    INLINE unsigned int getNumberOfLogicalProcessors() {
#ifdef _OPENMP
      return omp_get_num_procs();
#else
      return std::thread::hardware_concurrency();
#endif
    }
 
    INLINE unsigned int getThreadNumber() {
#ifdef _OPENMP
      return omp_get_thread_num();
#else
      return 0;
#endif
    }
 
    INLINE unsigned int getNumberOfRunningThreads() {
#ifdef _OPENMP
      return omp_get_num_threads();
#else
      return 1;
#endif
    }
 
    INLINE void setNestedParallelism(bool value) {
#ifdef _OPENMP
      omp_set_nested(((value == true) ? 1 : 0));
#else
      GUM_ERROR(OperationNotAllowed,
                "openMP was not enabled at compilation (and you "
                "asked for nested parallelism !)");
#endif
    }
 
    INLINE bool getNestedParallelism() {
#ifdef _OPENMP
      return ((omp_get_nested() == 0) ? false : true);
#else
      return false;
#endif
    }
 
    INLINE void setDynamicThreadsNumber(bool value) {
#ifdef _OPENMP
      omp_set_dynamic(((value == true) ? 1 : 0));
#else
      GUM_ERROR(OperationNotAllowed,
                "openMP was not enabled at compilation (and you "
                "asked for dynamic adjustment of the number of "
                "threads !)");
#endif
    }
 
    INLINE bool getDynamicThreadsNumber() {
#ifdef _OPENMP
      return ((omp_get_dynamic() == 0) ? false : true);
#else
      return false;
#endif
    }
 
  } /* namespace threadsOMP */
 
}   // namespace gum