Struct salsa::Runtime

pub struct Runtime { /* fields omitted */ }

The salsa runtime stores the storage for all queries as well as tracking the query stack and dependencies between cycles.

Each new runtime you create (e.g., via Runtime::new or Runtime::default) will have an independent set of query storage associated with it. Normally, therefore, you only do this once, at the start of your application.

Implementations

impl Runtime

pub fn new() -> Self

Create a new runtime; equivalent to Self::default. This is used when creating a new database.

pub fn synthetic_write(&mut self, durability: Durability)

A “synthetic write” causes the system to act as though some input of durability durability has changed. This is mostly useful for profiling scenarios.

WARNING: Just like an ordinary write, this method triggers cancellation. If you invoke it while a snapshot exists, it will block until that snapshot is dropped – if that snapshot is owned by the current thread, this could trigger deadlock.

pub fn id(&self) -> RuntimeId

The unique identifier attached to this SalsaRuntime. Each snapshotted runtime has a distinct identifier.

pub fn active_query(&self) -> Option<DatabaseKeyIndex>

Returns the database-key for the query that this thread is actively executing (if any).

pub fn report_untracked_read(&self)

Reports that the query depends on some state unknown to salsa.

Queries which report untracked reads will be re-executed in the next revision.

pub fn report_synthetic_read(&self, durability: Durability)

Acts as though the current query had read an input with the given durability; this will force the current query’s durability to be at most durability.

This is mostly useful to control the durability level for on-demand inputs.

Trait Implementations

impl Debug for Runtime

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

Formats the value using the given formatter.

impl Default for Runtime

fn default() -> Self

Returns the “default value” for a type.