Struct miri::concurrency::weak_memory::StoreElement

struct StoreElement {
    store_index: VectorIdx,
    is_seqcst: bool,
    timestamp: VTimestamp,
    val: Option<Scalar>,
    load_info: RefCell<LoadInfo>,
}

Fields

store_index: VectorIdx

The identifier of the vector index, corresponding to a thread that performed the store.

is_seqcst: bool

Whether this store is SC.

timestamp: VTimestamp

The timestamp of the storing thread when it performed the store

val: Option<Scalar>

The value of this store. None means uninitialized.

load_info: RefCell<LoadInfo>

Metadata about loads from this store element, behind a RefCell to keep load op take &self

Implementations

impl StoreElement

fn load_impl( &self, index: VectorIdx, clocks: &ThreadClockSet, is_seqcst: bool, ) -> Option<Scalar>

ATOMIC LOAD IMPL in the paper Unlike the operational semantics in the paper, we don’t need to keep track of the thread timestamp for every single load. Keeping track of the first (smallest) timestamp of each thread that has loaded from a store is sufficient: if the earliest load of another thread happens before the current one, then we must stop searching the store buffer regardless of subsequent loads by the same thread; if the earliest load of another thread doesn’t happen before the current one, then no subsequent load by the other thread can happen before the current one.

Trait Implementations

impl Clone for StoreElement

fn clone(&self) -> StoreElement

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for StoreElement

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

Formats the value using the given formatter.

impl PartialEq for StoreElement

fn eq(&self, other: &StoreElement) -> 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 Eq for StoreElement

impl StructuralPartialEq for StoreElement

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: 104 bytes