mirror of
https://github.com/salsa-rs/salsa.git
synced 2025-01-12 16:35:21 +00:00
85 lines
2.7 KiB
Rust
85 lines
2.7 KiB
Rust
use crate::setup::{Input, Knobs, ParDatabase, ParDatabaseImpl, WithValue};
|
|
use salsa::{Database, ParallelDatabase};
|
|
|
|
/// Add test where a call to `sum` is cancelled by a simultaneous
|
|
/// write. Check that we recompute the result in next revision, even
|
|
/// though none of the inputs have changed.
|
|
#[test]
|
|
fn in_par_get_set_cancellation_immediate() {
|
|
let mut db = ParDatabaseImpl::default();
|
|
|
|
db.query_mut(Input).set('a', 100);
|
|
db.query_mut(Input).set('b', 010);
|
|
db.query_mut(Input).set('c', 001);
|
|
db.query_mut(Input).set('d', 0);
|
|
|
|
let thread1 = std::thread::spawn({
|
|
let db = db.snapshot();
|
|
move || {
|
|
// This will not return until it sees cancellation is
|
|
// signaled.
|
|
db.knobs().sum_signal_on_entry.with_value(1, || {
|
|
db.knobs()
|
|
.sum_wait_for_cancellation
|
|
.with_value(true, || db.sum("abc"))
|
|
})
|
|
}
|
|
});
|
|
|
|
// Wait until we have entered `sum` in the other thread.
|
|
db.wait_for(1);
|
|
|
|
// Try to set the input. This will signal cancellation.
|
|
db.query_mut(Input).set('d', 1000);
|
|
|
|
// This should re-compute the value (even though no input has changed).
|
|
let thread2 = std::thread::spawn({
|
|
let db = db.snapshot();
|
|
move || db.sum("abc")
|
|
});
|
|
|
|
assert_eq!(db.sum("d"), 1000);
|
|
assert_eq!(thread1.join().unwrap(), std::usize::MAX);
|
|
assert_eq!(thread2.join().unwrap(), 111);
|
|
}
|
|
|
|
/// Here, we check that `sum`'s cancellation is propagated
|
|
/// to `sum2` properly.
|
|
#[test]
|
|
fn in_par_get_set_cancellation_transitive() {
|
|
let mut db = ParDatabaseImpl::default();
|
|
|
|
db.query_mut(Input).set('a', 100);
|
|
db.query_mut(Input).set('b', 010);
|
|
db.query_mut(Input).set('c', 001);
|
|
db.query_mut(Input).set('d', 0);
|
|
|
|
let thread1 = std::thread::spawn({
|
|
let db = db.snapshot();
|
|
move || {
|
|
// This will not return until it sees cancellation is
|
|
// signaled.
|
|
db.knobs().sum_signal_on_entry.with_value(1, || {
|
|
db.knobs()
|
|
.sum_wait_for_cancellation
|
|
.with_value(true, || db.sum2("abc"))
|
|
})
|
|
}
|
|
});
|
|
|
|
// Wait until we have entered `sum` in the other thread.
|
|
db.wait_for(1);
|
|
|
|
// Try to set the input. This will signal cancellation.
|
|
db.query_mut(Input).set('d', 1000);
|
|
|
|
// This should re-compute the value (even though no input has changed).
|
|
let thread2 = std::thread::spawn({
|
|
let db = db.snapshot();
|
|
move || db.sum2("abc")
|
|
});
|
|
|
|
assert_eq!(db.sum2("d"), 1000);
|
|
assert_eq!(thread1.join().unwrap(), std::usize::MAX);
|
|
assert_eq!(thread2.join().unwrap(), 111);
|
|
}
|