Struct rustc_middle::mir::interpret::allocation::InitMask

pub struct InitMask {
    blocks: Vec<u64>,
    len: Size,
}

A bitmask where each bit refers to the byte with the same index. If the bit is true, the byte is initialized. If it is false the byte is uninitialized.

Fields

blocks: Vec<u64>

len: Size

Implementations

impl InitMask

pub const BLOCK_SIZE: u64 = 64u64

fn bit_index(bits: Size) -> (usize, usize)

fn size_from_bit_index(block: impl TryInto<u64>, bit: impl TryInto<u64>) -> Size

pub fn new(size: Size, state: bool) -> Self

pub fn set_range(&mut self, start: Size, end: Size, new_state: bool)

pub fn set_range_inbounds(&mut self, start: Size, end: Size, new_state: bool)

pub fn get(&self, i: Size) -> bool

pub fn set(&mut self, i: Size, new_state: bool)

fn set_bit(&mut self, block: usize, bit: usize, new_state: bool)

pub fn grow(&mut self, amount: Size, new_state: bool)

fn find_bit(&self, start: Size, end: Size, is_init: bool) -> Option<Size>

Returns the index of the first bit in start..end (end-exclusive) that is equal to is_init.

impl InitMask

pub fn is_range_initialized(
    &self,
    start: Size,
    end: Size
) -> Result<(), AllocRange>

Checks whether the range start..end (end-exclusive) is entirely initialized.

Returns Ok(()) if it’s initialized. Otherwise returns a range of byte indexes for the first contiguous span of the uninitialized access.

pub fn range_as_init_chunks(&self, start: Size, end: Size) -> InitChunkIter<'_>

Returns an iterator, yielding a range of byte indexes for each contiguous region of initialized or uninitialized bytes inside the range start..end (end-exclusive).

The iterator guarantees the following:

• Chunks are nonempty.
• Chunks are adjacent (each range’s start is equal to the previous range’s end).
• Chunks span exactly start..end (the first starts at start, the last ends at end).
• Chunks alternate between InitChunk::Init and InitChunk::Uninit.

Trait Implementations

impl Clone for InitMask

fn clone(&self) -> InitMask

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for InitMask

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

Formats the value using the given formatter.

impl<'tcx, __D: TyDecoder<I = TyCtxt<'tcx>>> Decodable<__D> for InitMask

fn decode(__decoder: &mut __D) -> Self

impl<'tcx, __E: TyEncoder<I = TyCtxt<'tcx>>> Encodable<__E> for InitMask

fn encode(&self, __encoder: &mut __E)

impl Hash for InitMask

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,

Feeds a slice of this type into the given Hasher.

impl<'__ctx> HashStable<StableHashingContext<'__ctx>> for InitMask

fn hash_stable(
    &self,
    __hcx: &mut StableHashingContext<'__ctx>,
    __hasher: &mut StableHasher
)

impl Ord for InitMask

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

This method returns an Ordering between self and other.

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

Compares and returns the maximum of two values.

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

Compares and returns the minimum of two values.

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

Restrict a value to a certain interval.

impl PartialEq<InitMask> for InitMask

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

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

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

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

impl PartialOrd<InitMask> for InitMask

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

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

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

This method tests less than (for self and other) and is used by the < operator.

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

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

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

This method tests greater than (for self and other) and is used by the > operator.

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

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

impl Eq for InitMask

impl StructuralEq for InitMask

impl StructuralPartialEq for InitMask

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: 32 bytes