nda::mem::stats< A >

#include <nda/mem/allocators.hpp>

Detailed Description

template<Allocator A>
class nda::mem::stats< A >

Wrap an allocator to gather statistics about memory allocation.

It gathers a histogram of the different allocation sizes. The histogram is a std::vector of size 65, where element \( i \in \{0,...,63\} \) contains the number of allocations with a size in the range \( [2^{64-i-1}, 2^{64-i}) \) and the last element contains the number of allocations of size zero.

Template Parameters

A	nda::mem::Allocator type to wrap.

Definition at line 571 of file allocators.hpp.

Public Member Functions
	stats ()=default
	Default constructor.
	stats (stats &&)=default
	Default move constructor.
	stats (stats const &)=delete
	Deleted copy constructor.
	~stats ()
	Destructor that outputs the statistics about the memory allocation in debug mode.
blk_t	allocate (uint64_t s)
	Allocate memory and update the histogram.
blk_t	allocate_zero (uint64_t s)
	Allocate memory, set it to zero and update the histogram.
void	deallocate (blk_t b) noexcept
	Deallocate memory.
auto const &	histogram () const noexcept
	Get the histogram of the allocation sizes.
stats &	operator= (stats &&)=default
	Default move assignment operator.
stats &	operator= (stats const &)=delete
	Deleted copy assignment operator.
bool	owns (blk_t b) const noexcept
	Check if a given nda::mem::blk_t memory block is owned by the base allocator.
void	print_histogram (std::ostream &os) const
	Print the histogram to a std::ostream.

Static Public Attributes
static constexpr auto	address_space = A::address_space
	nda::mem::AddressSpace in which the memory is allocated.

Member Function Documentation

allocate()

template<Allocator A>

blk_t nda::mem::stats< A >::allocate ( uint64_t s )

inline

Allocate memory and update the histogram.

Parameters

s	Size in bytes of the memory to allocate.

Returns

nda::mem::blk_t memory block.

Definition at line 607 of file allocators.hpp.

allocate_zero()

template<Allocator A>

blk_t nda::mem::stats< A >::allocate_zero ( uint64_t s )

inline

Allocate memory, set it to zero and update the histogram.

Parameters

s	Size in bytes of the memory to allocate.

Returns

nda::mem::blk_t memory block.

Definition at line 619 of file allocators.hpp.

deallocate()

template<Allocator A>

void nda::mem::stats< A >::deallocate ( blk_t b )

inlinenoexcept

Deallocate memory.

Parameters

b	nda::mem::blk_t memory block to deallocate.

Definition at line 629 of file allocators.hpp.

histogram()

template<Allocator A>

auto const & nda::mem::stats< A >::histogram ( ) const

inlinenodiscardnoexcept

Get the histogram of the allocation sizes.

Returns

std::vector of size 65 with the number of allocations in each size range.

Definition at line 643 of file allocators.hpp.

owns()

template<Allocator A>

bool nda::mem::stats< A >::owns ( blk_t b ) const

inlinenodiscardnoexcept

Check if a given nda::mem::blk_t memory block is owned by the base allocator.

Parameters

b	nda::mem::blk_t memory block.

Returns

True if the base allocator owns the memory block.

Definition at line 637 of file allocators.hpp.

print_histogram()

template<Allocator A>

void nda::mem::stats< A >::print_histogram ( std::ostream & os ) const

inline

Print the histogram to a std::ostream.

Parameters

os	std::ostream object to print to.

Definition at line 649 of file allocators.hpp.

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

• nda/mem/allocators.hpp