Kokkos_Threads.hpp

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//                        Kokkos v. 3.0
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#ifndef KOKKOS_THREADS_HPP
#define KOKKOS_THREADS_HPP
 
#include <Kokkos_Macros.hpp>
#if defined(KOKKOS_ENABLE_THREADS)
 
#include <Kokkos_Core_fwd.hpp>
 
#include <cstddef>
#include <iosfwd>
#include <Kokkos_HostSpace.hpp>
#include <Kokkos_ScratchSpace.hpp>
#include <Kokkos_Layout.hpp>
#include <Kokkos_MemoryTraits.hpp>
#include <impl/Kokkos_Profiling_Interface.hpp>
#include <impl/Kokkos_Tags.hpp>
#include <impl/Kokkos_ExecSpaceInitializer.hpp>
 
/*--------------------------------------------------------------------------*/
 
namespace Kokkos {
namespace Impl {
class ThreadsExec;
}  // namespace Impl
}  // namespace Kokkos
 
/*--------------------------------------------------------------------------*/
 
namespace Kokkos {
 
class Threads {
 public:
 
 
  using execution_space = Threads;
  using memory_space    = Kokkos::HostSpace;
 
  using device_type = Kokkos::Device<execution_space, memory_space>;
 
  using array_layout = Kokkos::LayoutRight;
  using size_type    = memory_space::size_type;
 
  using scratch_memory_space = ScratchMemorySpace<Threads>;
 
  /*------------------------------------------------------------------------*/
 
 
  static int in_parallel();
 
  static void print_configuration(std::ostream&, const bool detail = false);
 
  static void impl_static_fence();
 
  void fence() const;
 
  static int concurrency();
 
  static void impl_finalize();
 
  /*------------------------------------------------------------------------*/
  /*------------------------------------------------------------------------*/
 
 
  static void impl_initialize(unsigned threads_count             = 0,
                              unsigned use_numa_count            = 0,
                              unsigned use_cores_per_numa        = 0,
                              bool allow_asynchronous_threadpool = false);
 
  static int impl_is_initialized();
 
  static Threads& impl_instance(int = 0);
 
  //----------------------------------------
 
  static int impl_thread_pool_size(int depth = 0);
#if defined(KOKKOS_ACTIVE_EXECUTION_MEMORY_SPACE_HOST)
  static int impl_thread_pool_rank();
#else
  KOKKOS_INLINE_FUNCTION static int impl_thread_pool_rank() { return 0; }
#endif
 
  inline static unsigned impl_max_hardware_threads() {
    return impl_thread_pool_size(0);
  }
  KOKKOS_INLINE_FUNCTION static unsigned impl_hardware_thread_id() {
    return impl_thread_pool_rank();
  }
 
  uint32_t impl_instance_id() const noexcept { return 0; }
 
  static const char* name();
  //----------------------------------------
};
 
namespace Tools {
namespace Experimental {
template <>
struct DeviceTypeTraits<Threads> {
  static constexpr DeviceType id = DeviceType::Threads;
};
}  // namespace Experimental
}  // namespace Tools
 
namespace Impl {
 
class ThreadsSpaceInitializer : public ExecSpaceInitializerBase {
 public:
  ThreadsSpaceInitializer()  = default;
  ~ThreadsSpaceInitializer() = default;
  void initialize(const InitArguments& args) final;
  void finalize(const bool) final;
  void fence() final;
  void print_configuration(std::ostream& msg, const bool detail) final;
};
 
}  // namespace Impl
}  // namespace Kokkos
 
/*--------------------------------------------------------------------------*/
 
namespace Kokkos {
namespace Impl {
 
template <>
struct MemorySpaceAccess<Kokkos::Threads::memory_space,
                         Kokkos::Threads::scratch_memory_space> {
  enum : bool { assignable = false };
  enum : bool { accessible = true };
  enum : bool { deepcopy = false };
};
 
}  // namespace Impl
}  // namespace Kokkos
 
/*--------------------------------------------------------------------------*/
 
#include <Kokkos_ExecPolicy.hpp>
#include <Kokkos_Parallel.hpp>
#include <Threads/Kokkos_ThreadsExec.hpp>
#include <Threads/Kokkos_ThreadsTeam.hpp>
#include <Threads/Kokkos_Threads_Parallel.hpp>
 
#include <KokkosExp_MDRangePolicy.hpp>
 
//----------------------------------------------------------------------------
//----------------------------------------------------------------------------
 
#endif /* #if defined( KOKKOS_ENABLE_THREADS ) */
#endif /* #define KOKKOS_THREADS_HPP */