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34 lines
882 B
Rust
34 lines
882 B
Rust
use crate::setup::{Input, ParDatabase, ParDatabaseImpl};
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use salsa::{Database, ParallelDatabase};
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/// Test where a read and a set are racing with one another.
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/// Should be atomic.
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#[test]
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fn in_par_get_set_race() {
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let db = ParDatabaseImpl::default();
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db.query(Input).set('a', 100);
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db.query(Input).set('b', 010);
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db.query(Input).set('c', 001);
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let thread1 = std::thread::spawn({
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let db = db.fork();
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move || {
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let v = db.sum("abc");
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v
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}
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});
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let thread2 = std::thread::spawn(move || {
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db.query(Input).set('a', 1000);
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db.sum("a")
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});
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// If the 1st thread runs first, you get 111, otherwise you get
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// 1011.
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let value1 = thread1.join().unwrap();
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assert!(value1 == 111 || value1 == 1011, "illegal result {}", value1);
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assert_eq!(thread2.join().unwrap(), 1000);
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}
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