Struct MapHugeFlag

pub struct MapHugeFlag(/* private fields */);

Represents a statically defined MAP_HUGE_* flag.

Implementations

impl MapHugeFlag

pub const HUGE_DEFAULT: Self

The kernel’s default huge-page size.

pub const HUGE_2MB: Self

Predefined MAP_HUGE_2MB mask,

pub const HUGE_1GB: Self

Predefined MAP_HUGE_1GB mask,

pub const unsafe fn from_mask_unchecked(flag: c_int) -> Self

Create from a raw MAP_HUGE_* flag.

Safety

The passed flag must be a valid bitmask representing a MAP_HUGE_* value only.

pub const fn calculate(kilobytes: NonZeroUsize) -> Self

Calculate a MAP_HUGE_* flag from a size (in kB).

pub const fn try_calculate(kilobytes: usize) -> Option<Self>

Attempt to calculate MAP_HUGE_* flag from a size (in kB).

pub const fn calculate_or_default(kilobytes: usize) -> Self

Attempt to calculate MAP_HUGE_*, or use HUGE_DEFAULT on failure.

Note

If kilobytes is 0, or there is a calculation overflow, then HUGE_DEFAULT is returned.

pub const fn is_default(&self) -> bool

Check if this is the smallest huge-page size the kernel supports.

pub const fn get_mask(self) -> c_int

Get the MAP_HUGE_* mask.

Trait Implementations

impl Clone for MapHugeFlag

fn clone(&self) -> MapHugeFlag

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MapHugeFlag

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

Formats the value using the given formatter.

impl Default for MapHugeFlag

fn default() -> Self

Returns the “default value” for a type.

impl From<MapHugeFlag> for c_int

fn from(from: MapHugeFlag) -> Self

Converts to this type from the input type.

impl Hash for MapHugeFlag

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for MapHugeFlag

fn cmp(&self, other: &MapHugeFlag) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for MapHugeFlag

fn eq(&self, other: &MapHugeFlag) -> bool

Tests for self and other values to be equal, and is used by ==.

const fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for MapHugeFlag

fn partial_cmp(&self, other: &MapHugeFlag) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl TryFrom<HugePage> for MapHugeFlag

type Error = HugePageCalcErr

The type returned in the event of a conversion error.

fn try_from(from: HugePage) -> Result<Self, Self::Error>

Performs the conversion.

impl Copy for MapHugeFlag

impl Eq for MapHugeFlag

impl StructuralPartialEq for MapHugeFlag