Particles::PropertyPool Class Reference

#include <deal.II/particles/property_pool.h>

Public Types
using	Handle = double *

Public Member Functions
	PropertyPool (const unsigned int n_properties_per_slot)
Handle	allocate_properties_array ()
void	deallocate_properties_array (const Handle handle)
ArrayView< double >	get_properties (const Handle handle)
void	reserve (const std::size_t size)
unsigned int	n_properties_per_slot () const

Static Public Attributes
static const Handle	invalid_handle = nullptr

Private Attributes
const unsigned int	n_properties

Detailed Description

This class manages a memory space in which particles store their properties. Because this is dynamic memory and often every particle needs the same amount, it is more efficient to let this be handled by a central manager that does not need to allocate/deallocate memory every time a particle is constructed/destroyed. The current implementation uses simple new/delete allocation for every block. Additionally, the current implementation assumes the same number of properties per particle, but of course the PropertyType could contain a pointer to dynamically allocated memory with varying sizes per particle (this memory would not be managed by this class). Because PropertyPool only returns handles it could be enhanced internally (e.g. to allow for varying number of properties per handle) without affecting its interface.

Definition at line 41 of file property_pool.h.

Member Typedef Documentation

using Particles::PropertyPool::Handle = double *

Typedef for the handle that is returned to the particles, and that uniquely identifies the slot of memory that is reserved for this particle.

Definition at line 49 of file property_pool.h.

Constructor & Destructor Documentation

Particles::PropertyPool::PropertyPool

(

const unsigned int

n_properties_per_slot

)

Constructor. Stores the number of properties per reserved slot.

Definition at line 26 of file property_pool.cc.

Member Function Documentation

PropertyPool::Handle Particles::PropertyPool::allocate_properties_array

(

)

Return a new handle that allows accessing the reserved block of memory. If the number of properties is zero this will return an invalid handle.

Definition at line 33 of file property_pool.cc.

void Particles::PropertyPool::deallocate_properties_array

(

const Handle

handle

)

Mark the properties corresponding to the handle handle as deleted. Calling this function more than once for the same handle causes undefined behavior.

Definition at line 45 of file property_pool.cc.

ArrayView< double > Particles::PropertyPool::get_properties

(

const Handle

handle

)

Return an ArrayView to the properties that correspond to the given handle handle.

Definition at line 53 of file property_pool.cc.

void Particles::PropertyPool::reserve

(

const std::size_t

size

)

Reserve the dynamic memory needed for storing the properties of size particles.

Definition at line 61 of file property_pool.cc.

unsigned int Particles::PropertyPool::n_properties_per_slot

(

)

const

Return how many properties are stored per slot in the pool.

Definition at line 69 of file property_pool.cc.

Member Data Documentation

const PropertyPool::Handle Particles::PropertyPool::invalid_handle = nullptr

static

Define a default (invalid) value for handles.

Definition at line 54 of file property_pool.h.

const unsigned int Particles::PropertyPool::n_properties

private

The number of properties that are reserved per particle.

Definition at line 101 of file property_pool.h.

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The documentation for this class was generated from the following files:

• deal.II/particles/property_pool.h
• /mnt/data/darndt/Sources/dealii-clang-6.0.0/source/particles/property_pool.cc