Struct MmapStrategy 

pub struct MmapStrategy {
    pub huge_page: HugePageSupport,
    pub prot: MmapProtection,
    pub replace: bool,
    pub reserve: bool,
}

Strategy for performing mmap

Fields

huge_page: HugePageSupport

Whether we should use huge page for this mmapping. Fallback: for platforms that do not support huge pages, this option can be ignored.

prot: MmapProtection

The protection flags for mmap.

replace: bool

Whether this mmap allows replacing existing mappings. Fallback: for platforms that cannot replace existing mappings, or always replace existing mappings, this option can be ignored.

reserve: bool

Whether this mmap allows reserve/commit physical memory. This has to be implemented properly for a platform. Otherwise, we will see huge unrealistic memory consumption.

Implementations

impl MmapStrategy

pub const INTERNAL_MEMORY: Self

The strategy for MMTk’s own internal memory

pub fn new( huge_page: HugePageSupport, prot: MmapProtection, replace: bool, reserve: bool, ) -> Self

Create a new strategy

pub fn huge_page(self, huge_page: HugePageSupport) -> Self

Set huge page option.

pub fn transparent_hugepages(self, enable: bool) -> Self

Set huge page option by a boolean flag.

pub fn prot(self, prot: MmapProtection) -> Self

Set protection option.

pub fn replace(self, replace: bool) -> Self

Set the replace flag.

pub fn reserve(self, reserve: bool) -> Self

Set the reserve flag.

impl MmapStrategy

pub fn get_posix_mmap_flags(&self) -> i32

get the flags for POSIX mmap.

Trait Implementations

impl Clone for MmapStrategy

fn clone(&self) -> MmapStrategy

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for MmapStrategy

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for MmapStrategy

fn default() -> Self

Returns the “default value” for a type.

impl Copy for MmapStrategy