/usr/include/trilinos/Kokkos_ScratchSpace.hpp is in libtrilinos-kokkos-dev 12.12.1-5.
This file is owned by root:root, with mode 0o644.
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// 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.
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// modification, are permitted provided that the following conditions are
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// 2. Redistributions in binary form must reproduce the above copyright
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// documentation and/or other materials provided with the distribution.
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// 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
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#ifndef KOKKOS_SCRATCHSPACE_HPP
#define KOKKOS_SCRATCHSPACE_HPP
#include <cstdio>
#include <Kokkos_Core_fwd.hpp>
#include <Kokkos_Concepts.hpp>
/*--------------------------------------------------------------------------*/
namespace Kokkos {
/** \brief Scratch memory space associated with an execution space.
*
*/
template< class ExecSpace >
class ScratchMemorySpace {
static_assert (is_execution_space<ExecSpace>::value,"Instantiating ScratchMemorySpace on non-execution-space type.");
public:
// Alignment of memory chunks returned by 'get'
// must be a power of two
enum { ALIGN = 8 };
private:
mutable char * m_iter_L0 ;
char * m_end_L0 ;
mutable char * m_iter_L1 ;
char * m_end_L1 ;
mutable int m_multiplier;
mutable int m_offset;
mutable int m_default_level;
ScratchMemorySpace();
ScratchMemorySpace & operator = ( const ScratchMemorySpace & );
enum { MASK = ALIGN - 1 }; // Alignment used by View::shmem_size
public:
//! Tag this class as a memory space
typedef ScratchMemorySpace memory_space ;
typedef ExecSpace execution_space ;
//! This execution space preferred device_type
typedef Kokkos::Device<execution_space,memory_space> device_type;
typedef typename ExecSpace::array_layout array_layout ;
typedef typename ExecSpace::size_type size_type ;
template< typename IntType >
KOKKOS_INLINE_FUNCTION static
IntType align( const IntType & size )
{ return ( size + MASK ) & ~MASK ; }
template< typename IntType >
KOKKOS_INLINE_FUNCTION
void* get_shmem (const IntType& size, int level = -1) const {
if(level == -1)
level = m_default_level;
if(level == 0) {
void* tmp = m_iter_L0 + m_offset * align (size);
if (m_end_L0 < (m_iter_L0 += align (size) * m_multiplier)) {
m_iter_L0 -= align (size) * m_multiplier; // put it back like it was
#ifdef KOKKOS_DEBUG
// mfh 23 Jun 2015: printf call consumes 25 registers
// in a CUDA build, so only print in debug mode. The
// function still returns NULL if not enough memory.
printf ("ScratchMemorySpace<...>::get_shmem: Failed to allocate "
"%ld byte(s); remaining capacity is %ld byte(s)\n", long(size),
long(m_end_L0-m_iter_L0));
#endif // KOKKOS_DEBUG
tmp = 0;
}
return tmp;
} else {
void* tmp = m_iter_L1 + m_offset * align (size);
if (m_end_L1 < (m_iter_L1 += align (size) * m_multiplier)) {
m_iter_L1 -= align (size) * m_multiplier; // put it back like it was
#ifdef KOKKOS_DEBUG
// mfh 23 Jun 2015: printf call consumes 25 registers
// in a CUDA build, so only print in debug mode. The
// function still returns NULL if not enough memory.
printf ("ScratchMemorySpace<...>::get_shmem: Failed to allocate "
"%ld byte(s); remaining capacity is %ld byte(s)\n", long(size),
long(m_end_L1-m_iter_L1));
#endif // KOKKOS_DEBUG
tmp = 0;
}
return tmp;
}
}
template< typename IntType >
KOKKOS_INLINE_FUNCTION
ScratchMemorySpace( void * ptr_L0 , const IntType & size_L0 , void * ptr_L1 = NULL , const IntType & size_L1 = 0)
: m_iter_L0( (char *) ptr_L0 )
, m_end_L0( m_iter_L0 + size_L0 )
, m_iter_L1( (char *) ptr_L1 )
, m_end_L1( m_iter_L1 + size_L1 )
, m_multiplier( 1 )
, m_offset( 0 )
, m_default_level( 0 )
{}
KOKKOS_INLINE_FUNCTION
const ScratchMemorySpace& set_team_thread_mode(const int& level, const int& multiplier, const int& offset) const {
m_default_level = level;
m_multiplier = multiplier;
m_offset = offset;
return *this;
}
};
} // namespace Kokkos
#endif /* #ifndef KOKKOS_SCRATCHSPACE_HPP */
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