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/usr/include/trilinos/Kokkos_OpenMP.hpp is in libtrilinos-kokkos-dev 12.12.1-5.

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/*
//@HEADER
// ************************************************************************
//
//                        Kokkos v. 2.0
//              Copyright (2014) Sandia Corporation
//
// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
// the U.S. Government retains certain rights in this software.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// 3. Neither the name of the Corporation nor the names of the
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY SANDIA CORPORATION "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SANDIA CORPORATION OR THE
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Questions? Contact  H. Carter Edwards (hcedwar@sandia.gov)
//
// ************************************************************************
//@HEADER
*/

#ifndef KOKKOS_OPENMP_HPP
#define KOKKOS_OPENMP_HPP

#include <Kokkos_Macros.hpp>
#if defined( KOKKOS_ENABLE_OPENMP)

#if !defined(_OPENMP)
#error "You enabled Kokkos OpenMP support without enabling OpenMP in the compiler!"
#endif

#include <Kokkos_Core_fwd.hpp>

#include <cstddef>
#include <iosfwd>
#include <Kokkos_HostSpace.hpp>

#ifdef KOKKOS_ENABLE_HBWSPACE
#include <Kokkos_HBWSpace.hpp>
#endif

#include <Kokkos_ScratchSpace.hpp>
#include <Kokkos_Parallel.hpp>
#include <Kokkos_TaskScheduler.hpp>
#include <Kokkos_Layout.hpp>
#include <impl/Kokkos_Tags.hpp>

/*--------------------------------------------------------------------------*/

namespace Kokkos {

/// \class OpenMP
/// \brief Kokkos device for multicore processors in the host memory space.
class OpenMP {
public:
  //------------------------------------
  //! \name Type declarations that all Kokkos devices must provide.
  //@{

  //! Tag this class as a kokkos execution space
  using execution_space = OpenMP;
  #ifdef KOKKOS_ENABLE_HBWSPACE
  using memory_space = Experimental::HBWSpace;
  #else
  using memory_space = HostSpace;
  #endif
  //! This execution space preferred device_type
  using device_type = Kokkos::Device<execution_space,memory_space>;

  using array_layout = LayoutRight;
  using size_type = memory_space::size_type;

  using scratch_memory_space = ScratchMemorySpace< OpenMP >;

  //@}
  //------------------------------------
  //! \name Functions that all Kokkos execution spaces must implement.
  //@{

  inline static bool in_parallel();

  /** \brief  Set the device in a "sleep" state. A noop for OpenMP.  */
  static bool sleep();

  /** \brief Wake the device from the 'sleep' state. A noop for OpenMP. */
  static bool wake();

  /** \brief Wait until all dispatched functors complete. A noop for OpenMP. */
  static void fence() {}

  /// \brief Print configuration information to the given output stream.
  static void print_configuration( std::ostream & , const bool detail = false );

  /// \brief Free any resources being consumed by the device.
  static void finalize();

  /** \brief  Initialize the device.
   *
   *  1) If the hardware locality library is enabled and OpenMP has not
   *     already bound threads then bind OpenMP threads to maximize
   *     core utilization and group for memory hierarchy locality.
   *
   *  2) Allocate a HostThread for each OpenMP thread to hold its
   *     topology and fan in/out data.
   */
  static void initialize( unsigned thread_count = 0 ,
                          unsigned use_numa_count = 0 ,
                          unsigned use_cores_per_numa = 0 );

  static int is_initialized();

  /** \brief  Return the maximum amount of concurrency.  */
  static int concurrency();

  //@}
  //------------------------------------
  /** \brief  This execution space has a topological thread pool which can be queried.
   *
   *  All threads within a pool have a common memory space for which they are cache coherent.
   *    depth = 0  gives the number of threads in the whole pool.
   *    depth = 1  gives the number of threads in a NUMA region, typically sharing L3 cache.
   *    depth = 2  gives the number of threads at the finest granularity, typically sharing L1 cache.
   */
  inline static int thread_pool_size( int depth = 0 );

  /** \brief  The rank of the executing thread in this thread pool */
  KOKKOS_INLINE_FUNCTION static int thread_pool_rank();

  //------------------------------------

  inline static unsigned max_hardware_threads() { return thread_pool_size(0); }

  KOKKOS_INLINE_FUNCTION static
  unsigned hardware_thread_id() { return thread_pool_rank(); }

  static const char* name();
};

} // namespace Kokkos

/*--------------------------------------------------------------------------*/
/*--------------------------------------------------------------------------*/

namespace Kokkos {
namespace Impl {

template<>
struct MemorySpaceAccess
  < Kokkos::OpenMP::memory_space
  , Kokkos::OpenMP::scratch_memory_space
  >
{
  enum { assignable = false };
  enum { accessible = true };
  enum { deepcopy   = false };
};

template<>
struct VerifyExecutionCanAccessMemorySpace
  < Kokkos::OpenMP::memory_space
  , Kokkos::OpenMP::scratch_memory_space
  >
{
  enum { value = true };
  inline static void verify( void ) { }
  inline static void verify( const void * ) { }
};

} // namespace Impl
} // namespace Kokkos

/*--------------------------------------------------------------------------*/
/*--------------------------------------------------------------------------*/

#include <OpenMP/Kokkos_OpenMP_Exec.hpp>
#include <OpenMP/Kokkos_OpenMP_Parallel.hpp>
#include <OpenMP/Kokkos_OpenMP_Task.hpp>

#include <KokkosExp_MDRangePolicy.hpp>
/*--------------------------------------------------------------------------*/

#endif /* #if defined( KOKKOS_ENABLE_OPENMP ) && defined( _OPENMP ) */
#endif /* #ifndef KOKKOS_OPENMP_HPP */