-
Notifications
You must be signed in to change notification settings - Fork 490
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
core: tests: Add some basic tests for ThreadPoolBuilder::use_current_…
…thread. Ideas for testing the "call cleanup function from a job" case would be great.
- Loading branch information
Showing
2 changed files
with
51 additions
and
0 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,47 @@ | ||
use rayon_core::ThreadPoolBuilder; | ||
use std::sync::{Arc, Condvar, Mutex}; | ||
use std::thread::{self, JoinHandle}; | ||
|
||
#[test] | ||
fn use_current_thread_basic() { | ||
static JOIN_HANDLES: Mutex<Vec<JoinHandle<()>>> = Mutex::new(Vec::new()); | ||
let pool = ThreadPoolBuilder::new() | ||
.num_threads(2) | ||
.use_current_thread() | ||
.spawn_handler(|builder| { | ||
let handle = thread::Builder::new().spawn(|| builder.run())?; | ||
JOIN_HANDLES.lock().unwrap().push(handle); | ||
Ok(()) | ||
}) | ||
.build() | ||
.unwrap(); | ||
assert_eq!(rayon_core::current_thread_index(), Some(0)); | ||
assert_eq!( | ||
JOIN_HANDLES.lock().unwrap().len(), | ||
1, | ||
"Should only spawn one extra thread" | ||
); | ||
|
||
let pair = Arc::new((Mutex::new(false), Condvar::new())); | ||
let pair2 = Arc::clone(&pair); | ||
pool.spawn(move || { | ||
assert_ne!(rayon_core::current_thread_index(), Some(0)); | ||
// This should execute even if the current thread is blocked, since we have two threads in | ||
// the pool. | ||
let &(ref started, ref condvar) = &*pair2; | ||
*started.lock().unwrap() = true; | ||
condvar.notify_one(); | ||
}); | ||
|
||
let _guard = pair | ||
.1 | ||
.wait_while(pair.0.lock().unwrap(), |ran| !*ran) | ||
.unwrap(); | ||
std::mem::drop(pool); // Drop the pool. | ||
|
||
// Wait until all threads have actually exited. This is not really needed, other than to | ||
// reduce noise of leak-checking tools. | ||
for handle in std::mem::take(&mut *JOIN_HANDLES.lock().unwrap()) { | ||
let _ = handle.join(); | ||
} | ||
} |