Struct mmap_fixed::MemoryMap

pub struct MemoryMap { /* fields omitted */ }

A memory mapped file or chunk of memory. This is a very system-specific interface to the OS's memory mapping facilities (mmap on POSIX, VirtualAlloc/CreateFileMapping on Windows). It makes no attempt at abstracting platform differences, besides in error values returned. Consider yourself warned.

The memory map is released (unmapped) when the destructor is run, so don't let it leave scope by accident if you want it to stick around.

Methods

impl MemoryMap

fn new(min_len: usize, options: &[MapOption]) -> Result<MemoryMap, MapError>

Create a new mapping with the given options, at least min_len bytes long.

fn granularity() -> usize

Granularity of MapAddr() and MapOffset() parameter values. This may be greater than the value returned by page_size().

impl MemoryMap

fn data(&self) -> *mut u8

Returns the pointer to the memory created or modified by this map.

fn len(&self) -> usize

Returns the number of bytes this map applies to.

fn kind(&self) -> MemoryMapKind

Returns the type of mapping this represents.

Trait Implementations

impl Drop for MemoryMap

fn drop(&mut self)

Unmap the mapping. Panics the task if any of VirtualFree, UnmapViewOfFile, or CloseHandle fail.