Kokkos_Core_fwd.hpp

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//                             Kokkos
//         Manycore Performance-Portable Multidimensional Arrays
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#ifndef KOKKOS_CORE_FWD_HPP
#define KOKKOS_CORE_FWD_HPP

//----------------------------------------------------------------------------
// Kokkos_Macros.hpp does introspection on configuration options
// and compiler environment then sets a collection of #define macros.

#include <Kokkos_Macros.hpp>

//----------------------------------------------------------------------------
//----------------------------------------------------------------------------
// Forward declarations for class inter-relationships

namespace Kokkos {

class HostSpace ; 
class Serial ;    

#if defined( KOKKOS_HAVE_PTHREAD )
class Threads ;  
#endif

#if defined( KOKKOS_HAVE_OPENMP )
class OpenMP ; 
#endif

#if defined( KOKKOS_HAVE_CUDA )
class CudaSpace ;            
class CudaUVMSpace ;         
class CudaHostPinnedSpace ;  
class Cuda ;                 
#endif

} // namespace Kokkos

//----------------------------------------------------------------------------
//----------------------------------------------------------------------------
// Set the default execution space.


namespace Kokkos {

#if   defined ( KOKKOS_HAVE_DEFAULT_DEVICE_TYPE_CUDA )
  typedef Kokkos::Cuda DefaultExecutionSpace ;
#elif defined ( KOKKOS_HAVE_DEFAULT_DEVICE_TYPE_OPENMP )
  typedef OpenMP DefaultExecutionSpace ;
#elif defined ( KOKKOS_HAVE_DEFAULT_DEVICE_TYPE_THREADS )
  typedef Threads DefaultExecutionSpace ;
#elif defined ( KOKKOS_HAVE_DEFAULT_DEVICE_TYPE_SERIAL )
  typedef Serial DefaultExecutionSpace ;
#endif

} // namespace Kokkos

//----------------------------------------------------------------------------
//----------------------------------------------------------------------------
// Detect the active execution space and define its memory space.
// This is used to verify whether a running kernel can access
// a given memory space.

namespace Kokkos {
namespace Impl {

#if defined( KOKKOS_ACTIVE_EXECUTION_MEMORY_SPACE_CUDA )
typedef Kokkos::CudaSpace  ActiveExecutionMemorySpace ;
#elif defined( KOKKOS_ACTIVE_EXECUTION_MEMORY_SPACE_HOST )
typedef Kokkos::HostSpace  ActiveExecutionMemorySpace ;
#else
typedef void ActiveExecutionMemorySpace ;
#endif

template< class ActiveSpace , class MemorySpace >
struct VerifyExecutionCanAccessMemorySpace {
  enum {value = 0};
};

template< class Space >
struct VerifyExecutionCanAccessMemorySpace< Space , Space >
{
  enum {value = 1};
  KOKKOS_INLINE_FUNCTION static void verify(void) {}
  KOKKOS_INLINE_FUNCTION static void verify(const void *) {}
};

} // namespace Impl
} // namespace Kokkos

#define KOKKOS_RESTRICT_EXECUTION_TO_DATA( DATA_SPACE , DATA_PTR ) \
  Kokkos::Impl::VerifyExecutionCanAccessMemorySpace< \
    Kokkos::Impl::ActiveExecutionMemorySpace , DATA_SPACE >::verify( DATA_PTR )

#define KOKKOS_RESTRICT_EXECUTION_TO_( DATA_SPACE ) \
  Kokkos::Impl::VerifyExecutionCanAccessMemorySpace< \
    Kokkos::Impl::ActiveExecutionMemorySpace , DATA_SPACE >::verify()

#endif /* #ifndef KOKKOS_CORE_FWD_HPP */