gmx::PageAlignedAllocationPolicy Class Reference

#include <gromacs/utility/include/gromacs/utility/alignedallocator.h>

Description

Policy class for configuring gmx::Allocator, to manage allocations of page-aligned memory that can be locked for asynchronous transfer to GPU devices.

Static Public Member Functions
static std::size_t	alignment ()
	Return the alignment size of memory pages on this system. More...
static void *	malloc (std::size_t bytes)
	Allocate memory aligned to alignment() bytes. More...
static void	free (void *p)
	Free aligned memory. More...

Member Function Documentation

std::size_t gmx::PageAlignedAllocationPolicy::alignment ( )

static

Return the alignment size of memory pages on this system.

Queries sysconf/WinAPI, otherwise guesses 4096.

void gmx::PageAlignedAllocationPolicy::free ( void *  p )

static

Free aligned memory.

Parameters

p	Memory pointer previously returned from malloc()

Note

This routine should only be called with pointers obtained from gmx::PageAlignedAllocationPolicy::malloc(), and absolutely not any pointers obtained the system malloc().

void * gmx::PageAlignedAllocationPolicy::malloc ( std::size_t  bytes )

static

Allocate memory aligned to alignment() bytes.

Parameters

bytes

Amount of memory (bytes) to allocate. It is valid to ask for 0 bytes, which will return a non-null pointer that is properly aligned and padded (but that you should not use).

Returns

Valid pointer if the allocation worked, otherwise nullptr.

Note

Memory allocated with this routine must be released with gmx::PageAlignedAllocationPolicy::free(), and absolutely not the system free().

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

• src/gromacs/utility/include/gromacs/utility/alignedallocator.h
• src/gromacs/utility/alignedallocator.cpp