Enum rustix::mm::Advice

source · [−]

#[repr(u32)]
#[non_exhaustive]
pub enum Advice {
Show 23 variants    Normal,
    Sequential,
    Random,
    WillNeed,
    LinuxDontNeed,
    LinuxFree,
    LinuxRemove,
    LinuxDontFork,
    LinuxDoFork,
    LinuxHwPoison,
    LinuxSoftOffline,
    LinuxMergeable,
    LinuxUnmergeable,
    LinuxHugepage,
    LinuxNoHugepage,
    LinuxDontDump,
    LinuxDoDump,
    LinuxWipeOnFork,
    LinuxKeepOnFork,
    LinuxCold,
    LinuxPageOut,
    LinuxPopulateRead,
    LinuxPopulateWrite,
}

Expand description

POSIX_MADV_* constants for use with madvise.

Variants (Non-exhaustive)

This enum is marked as non-exhaustive

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

`Normal`

POSIX_MADV_NORMAL

`Sequential`

POSIX_MADV_SEQUENTIAL

`Random`

POSIX_MADV_RANDOM

`WillNeed`

POSIX_MADV_WILLNEED

`LinuxDontNeed`

MADV_DONTNEED

`LinuxFree`

MADV_FREE (since Linux 4.5)

`LinuxRemove`

MADV_REMOVE

`LinuxDontFork`

MADV_DONTFORK

`LinuxDoFork`

MADV_DOFORK

`LinuxHwPoison`

MADV_HWPOISON

`LinuxSoftOffline`

MADV_SOFT_OFFLINE

`LinuxMergeable`

MADV_MERGEABLE

`LinuxUnmergeable`

MADV_UNMERGEABLE

`LinuxHugepage`

MADV_HUGEPAGE (since Linux 2.6.38)

`LinuxNoHugepage`

MADV_NOHUGEPAGE (since Linux 2.6.38)

`LinuxDontDump`

MADV_DONTDUMP (since Linux 3.4)

`LinuxDoDump`

MADV_DODUMP (since Linux 3.4)

`LinuxWipeOnFork`

MADV_WIPEONFORK (since Linux 4.14)

`LinuxKeepOnFork`

MADV_KEEPONFORK (since Linux 4.14)

`LinuxCold`

MADV_COLD (since Linux 5.4)

`LinuxPageOut`

MADV_PAGEOUT (since Linux 5.4)

`LinuxPopulateRead`

MADV_POPULATE_READ (since Linux 5.14)

`LinuxPopulateWrite`

MADV_POPULATE_WRITE (since Linux 5.14)

Implementations

impl Advice

pub const DontNeed: Self

POSIX_MADV_DONTNEED

On Linux, this is mapped to POSIX_MADV_NORMAL because Linux’s MADV_DONTNEED differs from POSIX_MADV_DONTNEED. See LinuxDontNeed for the Linux behavior.

Trait Implementations

impl Clone for Advice

fn clone(&self) -> Advice

Returns a copy of the value. Read more

1.0.0 · source

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

Performs copy-assignment from source. Read more

impl Debug for Advice

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

Formats the value using the given formatter. Read more

impl PartialEq<Advice> for Advice

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

This method tests for self and other values to be equal, and is used by ==. Read more

1.0.0 · source

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

This method tests for !=.

impl Copy for Advice

impl Eq for Advice

impl StructuralEq for Advice

impl StructuralPartialEq for Advice

Auto Trait Implementations

impl RefUnwindSafe for Advice

impl Send for Advice

impl Sync for Advice

impl Unpin for Advice

impl UnwindSafe for Advice

Blanket Implementations

impl<T> Any for T where
T: 'static + ?Sized,

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

impl<T> Borrow<T> for T where
T: ?Sized,

const: unstable · source

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for T where
T: ?Sized,

const: unstable · source

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

impl<T> From<T> for T

const: unstable · source

fn from(t: T) -> T

Returns the argument unchanged.

impl<T, U> Into<U> for T where
U: From<T>,

const: unstable · source

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

impl<T> ToOwned for T where
T: Clone,

type Owned = T

The resulting type after obtaining ownership.

fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more

fn clone_into(&self, target: &mut T)

🔬 This is a nightly-only experimental API. (toowned_clone_into)

Uses borrowed data to replace owned data, usually by cloning. Read more

impl<T, U> TryFrom<U> for T where
U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.

impl<T, U> TryInto<U> for T where
U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

const: unstable · source

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.