memory_mapper.hpp File Reference

Provides a portable interface for memory mapping portions of a file or for treating regions of memory as though they were memory-mapped files, which is useful for unit testing. More...

#include "pstore/os/file.hpp"

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Classes
class	pstore::system_page_size_interface
	An interface for accessing the fundamental virtual memory page size on the host. More...
class	pstore::system_page_size
class	pstore::memory_mapper_base
class	pstore::memory_mapper
	memory_mapper provides an operating system independent interface for memory mapping of files. More...
class	pstore::in_memory_mapper

Functions
std::shared_ptr< std::uint8_t >	pstore::aligned_valloc (std::size_t size, unsigned align)
	Allocates memory whose start address is a multiple of 'align'. More...
std::ostream &	pstore::operator<< (std::ostream &os, memory_mapper_base const &mm)

Detailed Description

Provides a portable interface for memory mapping portions of a file or for treating regions of memory as though they were memory-mapped files, which is useful for unit testing.

Function Documentation

aligned_valloc()

std::shared_ptr< std::uint8_t > pstore::aligned_valloc	(	std::size_t	size,
		unsigned	align
	)

Allocates memory whose start address is a multiple of 'align'.

This function uses the O/S memory allocation API directly and bypasses operator new/malloc(). This is to ensure that the library can safely change the memory permission (with mprotect() or equivalent).