qmc_allocator_traits< Allocator > Struct Template Reference

template class analogous to std::allocator_traits. More...

Collaboration diagram for qmc_allocator_traits< Allocator >:

Public Types
using	value_type = typename Allocator::value_type

Static Public Member Functions
static void	fill_n (value_type *ptr, size_t n, const value_type &value)
static void	attachReference (Allocator &from, Allocator &to, std::ptrdiff_t ptr_offset)
	So we can write generic tests that work with all QMCPACK allocators. More...
static void	updateTo (Allocator &a, value_type *host_ptr, size_t n, size_t offset=0)
static void	updateFrom (Allocator &a, value_type *host_ptr, size_t n, size_t offset=0)
static void	deviceSideCopyN (Allocator &a, 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 = false

Detailed Description

template<class Allocator>
struct qmcplusplus::qmc_allocator_traits< Allocator >

template class analogous to std::allocator_traits.

• defines the is_host_accessible and is_dual_space traits
• abstracts the data movement on,off and from place to place on device.
• abstracts the fill function for the allocator.

Definition at line 26 of file allocator_traits.hpp.

Member Typedef Documentation

value_type

using value_type = typename Allocator::value_type

Definition at line 28 of file allocator_traits.hpp.

Member Function Documentation

attachReference()

static void attachReference ( Allocator &  from, Allocator &  to, std::ptrdiff_t  ptr_offset  )

static

So we can write generic tests that work with all QMCPACK allocators.

Parameters

ptr_offset

pointer offset between to and from

Referenced by Vector< T, std::allocator< T > >::attachReference(), VectorSoaContainer< ST, 5 >::attachReference(), and Vector< T, std::allocator< T > >::Vector().

deviceSideCopyN()

static void deviceSideCopyN ( Allocator &  a, size_t  to, size_t  n, size_t  from  )

static

Referenced by VectorSoaContainer< ST, 5 >::copyDeviceDataByIndex().

fill_n()

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

inlinestatic

Definition at line 33 of file allocator_traits.hpp.

References OMPstd::fill_n(), and qmcplusplus::n.

Referenced by Vector< T, std::allocator< T > >::construct_fill_elements(), qmc_allocator_traits< DualAllocator< T, DeviceAllocator, HostAllocator > >::fill_n(), qmc_allocator_traits< OMPallocator< T, HostAllocator > >::fill_n(), Vector< T, std::allocator< T > >::operator=(), and Vector< T, std::allocator< T > >::zero().

{ std::fill_n(ptr, n, value); };

updateFrom()

static void updateFrom ( Allocator &  a, value_type *  host_ptr, size_t  n, size_t  offset = 0  )

static

Referenced by Vector< T, std::allocator< T > >::updateFrom(), and VectorSoaContainer< ST, 5 >::updateFrom().

updateTo()

static void updateTo ( Allocator &  a, value_type *  host_ptr, size_t  n, size_t  offset = 0  )

static

Referenced by Vector< T, std::allocator< T > >::updateTo(), and VectorSoaContainer< ST, 5 >::updateTo().

Member Data Documentation

is_dual_space

constexpr bool is_dual_space = false

static

Definition at line 31 of file allocator_traits.hpp.

is_host_accessible

constexpr bool is_host_accessible = true

static

Definition at line 30 of file allocator_traits.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/allocator_traits.hpp