Enum rustix::mm::Advice

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#[non_exhaustive]
#[repr(u32)]
pub enum Advice {
Show 24 variants Normal = 0, Sequential = 2, Random = 1, WillNeed = 3, LinuxDontNeed = 4, LinuxFree = 8, LinuxRemove = 9, LinuxDontFork = 10, LinuxDoFork = 11, LinuxHwPoison = 100, LinuxSoftOffline = 101, LinuxMergeable = 12, LinuxUnmergeable = 13, LinuxHugepage = 14, LinuxNoHugepage = 15, LinuxDontDump = 16, LinuxDoDump = 17, LinuxWipeOnFork = 18, LinuxKeepOnFork = 19, LinuxCold = 20, LinuxPageOut = 21, LinuxPopulateRead = 22, LinuxPopulateWrite = 23, LinuxDontneedLocked = 24,
}
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.
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Normal = 0

POSIX_MADV_NORMAL

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Sequential = 2

POSIX_MADV_SEQUENTIAL

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Random = 1

POSIX_MADV_RANDOM

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WillNeed = 3

POSIX_MADV_WILLNEED

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LinuxDontNeed = 4

MADV_DONTNEED

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LinuxFree = 8

MADV_FREE (since Linux 4.5)

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LinuxRemove = 9

MADV_REMOVE

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LinuxDontFork = 10

MADV_DONTFORK

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LinuxDoFork = 11

MADV_DOFORK

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LinuxHwPoison = 100

MADV_HWPOISON

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LinuxSoftOffline = 101

MADV_SOFT_OFFLINE

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LinuxMergeable = 12

MADV_MERGEABLE

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LinuxUnmergeable = 13

MADV_UNMERGEABLE

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LinuxHugepage = 14

MADV_HUGEPAGE

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LinuxNoHugepage = 15

MADV_NOHUGEPAGE

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LinuxDontDump = 16

MADV_DONTDUMP (since Linux 3.4)

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LinuxDoDump = 17

MADV_DODUMP (since Linux 3.4)

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LinuxWipeOnFork = 18

MADV_WIPEONFORK (since Linux 4.14)

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LinuxKeepOnFork = 19

MADV_KEEPONFORK (since Linux 4.14)

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LinuxCold = 20

MADV_COLD (since Linux 5.4)

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LinuxPageOut = 21

MADV_PAGEOUT (since Linux 5.4)

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LinuxPopulateRead = 22

MADV_POPULATE_READ (since Linux 5.14)

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LinuxPopulateWrite = 23

MADV_POPULATE_WRITE (since Linux 5.14)

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LinuxDontneedLocked = 24

MADV_DONTNEED_LOCKED (since Linux 5.18)

Implementations§

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impl Advice

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pub const DontNeed: Self = Self::Normal

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§

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impl Clone for Advice

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fn clone(&self) -> Advice

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for Advice

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

Formats the value using the given formatter. Read more
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impl PartialEq for Advice

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

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

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

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impl Eq for Advice

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impl StructuralPartialEq for Advice

Auto Trait Implementations§

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impl Freeze for Advice

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impl RefUnwindSafe for Advice

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impl Send for Advice

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impl Sync for Advice

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impl Unpin for Advice

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impl UnwindSafe for Advice

Blanket Implementations§

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

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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

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fn into(self) -> U

Calls U::from(self).

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

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

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.