Enum PosixFadviseAdvice 

#[non_exhaustive]
#[repr(i32)]
pub enum PosixFadviseAdvice {
    POSIX_FADV_NORMAL = 0,
    POSIX_FADV_SEQUENTIAL = 2,
    POSIX_FADV_RANDOM = 1,
    POSIX_FADV_NOREUSE = 5,
    POSIX_FADV_WILLNEED = 3,
    POSIX_FADV_DONTNEED = 4,
}

Available on crate feature fs only.

The specific advice provided to posix_fadvise.

Variants (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.

POSIX_FADV_NORMAL = 0

Revert to the default data access behavior.

POSIX_FADV_SEQUENTIAL = 2

The file data will be accessed sequentially.

POSIX_FADV_RANDOM = 1

A hint that file data will be accessed randomly, and prefetching is likely not advantageous.

POSIX_FADV_NOREUSE = 5

The specified data will only be accessed once and then not reused.

POSIX_FADV_WILLNEED = 3

The specified data will be accessed in the near future.

POSIX_FADV_DONTNEED = 4

The specified data will not be accessed in the near future.

Trait Implementations

impl Clone for PosixFadviseAdvice

fn clone(&self) -> PosixFadviseAdvice

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PosixFadviseAdvice

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

Formats the value using the given formatter.

impl Hash for PosixFadviseAdvice

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 PosixFadviseAdvice

fn cmp(&self, other: &PosixFadviseAdvice) -> 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 PosixFadviseAdvice

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

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

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 PosixFadviseAdvice

fn partial_cmp(&self, other: &PosixFadviseAdvice) -> 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 Copy for PosixFadviseAdvice

impl Eq for PosixFadviseAdvice

impl StructuralPartialEq for PosixFadviseAdvice

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 4 bytes

Size for each variant:

• POSIX_FADV_NORMAL: 0 bytes
• POSIX_FADV_SEQUENTIAL: 0 bytes
• POSIX_FADV_RANDOM: 0 bytes
• POSIX_FADV_NOREUSE: 0 bytes
• POSIX_FADV_WILLNEED: 0 bytes
• POSIX_FADV_DONTNEED: 0 bytes