Struct tikv_util::metrics::process_linux::PAGESIZE

struct PAGESIZE {
    __private_field: (),
}

Fields

__private_field: ()

Methods from Deref<Target = f64>

pub const RADIX: u32

pub const MANTISSA_DIGITS: u32

pub const DIGITS: u32

pub const EPSILON: f64

pub const MIN: f64

pub const MIN_POSITIVE: f64

pub const MAX: f64

pub const MIN_EXP: i32

pub const MAX_EXP: i32

pub const MIN_10_EXP: i32

pub const MAX_10_EXP: i32

pub const NAN: f64

pub const INFINITY: f64

pub const NEG_INFINITY: f64

pub fn as_ne_bytes(&self) -> &[u8; 8]

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

Return the memory representation of this floating point number as a byte array in native byte order.

to_ne_bytes should be preferred over this whenever possible.

Examples

#![feature(num_as_ne_bytes)]
let num = 12.5f64;
let bytes = num.as_ne_bytes();
assert_eq!(
    bytes,
    if cfg!(target_endian = "big") {
        &[0x40, 0x29, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]
    } else {
        &[0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x29, 0x40]
    }
);

pub fn total_cmp(&self, other: &f64) -> Ordering

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

Returns an ordering between self and other values. Unlike the standard partial comparison between floating point numbers, this comparison always produces an ordering in accordance to the totalOrder predicate as defined in IEEE 754 (2008 revision) floating point standard. The values are ordered in following order:

• Negative quiet NaN
• Negative signaling NaN
• Negative infinity
• Negative numbers
• Negative subnormal numbers
• Negative zero
• Positive zero
• Positive subnormal numbers
• Positive numbers
• Positive infinity
• Positive signaling NaN
• Positive quiet NaN

Note that this function does not always agree with the PartialOrd and PartialEq implementations of f64. In particular, they regard negative and positive zero as equal, while total_cmp doesn’t.

Example

#![feature(total_cmp)]
struct GoodBoy {
    name: String,
    weight: f64,
}

let mut bois = vec![
    GoodBoy { name: "Pucci".to_owned(), weight: 0.1 },
    GoodBoy { name: "Woofer".to_owned(), weight: 99.0 },
    GoodBoy { name: "Yapper".to_owned(), weight: 10.0 },
    GoodBoy { name: "Chonk".to_owned(), weight: f64::INFINITY },
    GoodBoy { name: "Abs. Unit".to_owned(), weight: f64::NAN },
    GoodBoy { name: "Floaty".to_owned(), weight: -5.0 },
];

bois.sort_by(|a, b| a.weight.total_cmp(&b.weight));

Trait Implementations

impl Deref for PAGESIZE

type Target = f64

The resulting type after dereferencing.

fn deref(&self) -> &f64

Dereferences the value.

impl LazyStatic for PAGESIZE

fn initialize(lazy: &Self)