qmc_allocator_traits< OMPallocator< T, HostAllocator > > Struct Template Reference

Specialization for OMPallocator which is a special DualAllocator with fused device and dualspace allocator functionality. More...

Collaboration diagram for qmc_allocator_traits< OMPallocator< T, HostAllocator > >:

Static Public Member Functions
static void	fill_n (T *ptr, size_t n, const T &value)
static void	attachReference (const OMPallocator< T, HostAllocator > &from, OMPallocator< T, HostAllocator > &to, std::ptrdiff_t ptr_offset)
static void	updateTo (OMPallocator< T, HostAllocator > &alloc, T *host_ptr, size_t n, size_t offset=0)
static void	updateFrom (OMPallocator< T, HostAllocator > &alloc, T *host_ptr, size_t n, size_t offset=0)
static void	deviceSideCopyN (OMPallocator< T, HostAllocator > &alloc, size_t to, size_t n, size_t from)

Static Public Attributes
static constexpr bool	is_host_accessible = true
static constexpr bool	is_dual_space = true

Detailed Description

template<typename T, class HostAllocator>
struct qmcplusplus::qmc_allocator_traits< OMPallocator< T, HostAllocator > >

Specialization for OMPallocator which is a special DualAllocator with fused device and dualspace allocator functionality.

Definition at line 133 of file OMPallocator.hpp.

Member Function Documentation

attachReference()

static void attachReference ( const OMPallocator< T, HostAllocator > &  from, OMPallocator< T, HostAllocator > &  to, std::ptrdiff_t  ptr_offset  )

inlinestatic

Definition at line 144 of file OMPallocator.hpp.

References OMPallocator< T, HostAllocator >::attachReference().

  {
    to.attachReference(from, ptr_offset);
  }

deviceSideCopyN()

static void deviceSideCopyN ( OMPallocator< T, HostAllocator > &  alloc, size_t  to, size_t  n, size_t  from  )

inlinestatic

Definition at line 162 of file OMPallocator.hpp.

References OMPallocator< T, HostAllocator >::get_device_ptr(), and qmcplusplus::n.

  {
    auto* dev_ptr = alloc.get_device_ptr();
    PRAGMA_OFFLOAD("omp target teams distribute parallel for is_device_ptr(dev_ptr)")
    for (int i = 0; i < n; i++)
      dev_ptr[to + i] = dev_ptr[from + i];
  }

fill_n()

static void fill_n ( T *  ptr, size_t  n, const T &  value  )

inlinestatic

Definition at line 138 of file OMPallocator.hpp.

References qmc_allocator_traits< Allocator >::fill_n(), and qmcplusplus::n.

  {
    qmc_allocator_traits<HostAllocator>::fill_n(ptr, n, value);
    //PRAGMA_OFFLOAD("omp target update to(ptr[:n])")
  }

updateFrom()

static void updateFrom ( OMPallocator< T, HostAllocator > &  alloc, T *  host_ptr, size_t  n, size_t  offset = 0  )

inlinestatic

Definition at line 156 of file OMPallocator.hpp.

  {
    PRAGMA_OFFLOAD("omp target update from(host_ptr[offset:n])");
  }

updateTo()

static void updateTo ( OMPallocator< T, HostAllocator > &  alloc, T *  host_ptr, size_t  n, size_t  offset = 0  )

inlinestatic

Definition at line 151 of file OMPallocator.hpp.

  {
    PRAGMA_OFFLOAD("omp target update to(host_ptr[offset:n])");
  }

Member Data Documentation

is_dual_space

constexpr bool is_dual_space = true

static

Definition at line 136 of file OMPallocator.hpp.

is_host_accessible

constexpr bool is_host_accessible = true

static

Definition at line 135 of file OMPallocator.hpp.

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The documentation for this struct was generated from the following file:

• /home/pk7/projects/qmc/for_cron_doxygen/qmcpack/src/Platforms/OMPTarget/OMPallocator.hpp