1081 lines
30 KiB
Rust
1081 lines
30 KiB
Rust
//! Concurrency tests for the announcement crate.
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//! Tests thread safety and concurrent operations.
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use announcement::Announcement;
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use std::collections::HashSet;
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use std::sync::{
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atomic::{AtomicBool, AtomicUsize, Ordering},
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Arc, Barrier, Mutex,
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};
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use std::thread;
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use std::time::Duration;
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/// Test: Concurrency: concurrent listener creation 1000
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///
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/// Verifies: Verifies concurrent listener creation 1000 works correctly with concurrent access
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/// Category: concurrency
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#[test]
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fn test_concurrent_listener_creation_1000() {
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let (announcer, announcement) = Announcement::new();
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let barrier = Arc::new(Barrier::new(1001));
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let mut handles = Vec::new();
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for i in 0..1000 {
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let ann = announcement.clone();
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let barrier = barrier.clone();
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handles.push(thread::spawn(move || {
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barrier.wait(); // Synchronize all threads
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let listener = ann.listener();
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(i, listener)
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}));
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}
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barrier.wait(); // Release all threads at once
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// Announce while threads might still be creating listeners
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thread::sleep(Duration::from_millis(1));
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announcer.announce(42).unwrap();
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// Collect all listeners
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let mut listeners = Vec::new();
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for handle in handles {
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let (id, listener) = handle.join().unwrap();
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listeners.push((id, listener));
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}
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// Verify all listeners received the value
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for (_, listener) in &listeners {
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assert_eq!(listener.try_listen(), Some(42));
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}
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assert_eq!(listeners.len(), 1000);
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}
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/// Test: Concurrency: concurrent try listen 1000
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///
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/// Verifies: Verifies concurrent try listen 1000 works correctly with concurrent access
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/// Category: concurrency
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#[test]
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fn test_concurrent_try_listen_1000() {
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let (announcer, announcement) = Announcement::new();
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// Create listeners first
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let mut listeners = Vec::new();
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for _ in 0..1000 {
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listeners.push(Arc::new(announcement.listener()));
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}
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announcer.announce(42).unwrap();
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let barrier = Arc::new(Barrier::new(1001));
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let mut handles = Vec::new();
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for listener in listeners {
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let barrier = barrier.clone();
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handles.push(thread::spawn(move || {
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barrier.wait();
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// All threads try_listen at once
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listener.try_listen()
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}));
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}
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barrier.wait(); // Release all threads
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// Verify all got the value
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for handle in handles {
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assert_eq!(handle.join().unwrap(), Some(42));
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}
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}
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/// Test: Concurrency: concurrent announce protection
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///
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/// Verifies: Verifies concurrent announce protection works correctly with concurrent access
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/// Category: concurrency
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#[test]
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fn test_concurrent_announce_protection() {
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// Since announce() consumes self, we can't actually have concurrent attempts
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// This test verifies the type system prevents this
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let (announcer, announcement) = Announcement::new();
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let listener = announcement.listener();
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// Only one thread can own the announcer
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announcer.announce(42).unwrap();
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// Can't announce again - announcer is consumed
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assert_eq!(listener.try_listen(), Some(42));
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}
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#[cfg(feature = "std")]
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/// Test: Concurrency: concurrent is announced checks
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///
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/// Verifies: Verifies concurrent is announced checks works correctly with concurrent access
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/// Category: concurrency
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#[test]
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fn test_concurrent_is_announced_checks() {
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let (announcer, announcement) = Announcement::new();
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let checking = Arc::new(AtomicBool::new(true));
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let false_count = Arc::new(AtomicUsize::new(0));
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let true_count = Arc::new(AtomicUsize::new(0));
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let mut handles = Vec::new();
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for _ in 0..100 {
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let ann = announcement.clone();
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let checking = checking.clone();
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let false_count = false_count.clone();
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let true_count = true_count.clone();
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handles.push(thread::spawn(move || {
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while checking.load(Ordering::Acquire) {
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if ann.is_announced() {
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true_count.fetch_add(1, Ordering::Relaxed);
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} else {
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false_count.fetch_add(1, Ordering::Relaxed);
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}
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thread::yield_now();
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}
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}));
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}
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// Let threads check for a bit
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thread::sleep(Duration::from_millis(10));
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// Announce
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announcer.announce(42).unwrap();
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// Let threads see the announcement
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thread::sleep(Duration::from_millis(10));
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// Stop checking
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checking.store(false, Ordering::Release);
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for handle in handles {
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handle.join().unwrap();
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}
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// Should have seen both states
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assert!(
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false_count.load(Ordering::Relaxed) > 0,
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"Should see false before announce"
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);
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assert!(
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true_count.load(Ordering::Relaxed) > 0,
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"Should see true after announce"
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);
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}
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/// Test: Concurrency test: thread safety shared state
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///
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/// Verifies: Verifies thread safety shared state works correctly under concurrent access
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/// Category: concurrency
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#[test]
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fn test_thread_safety_shared_state() {
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#[derive(Clone, Debug)]
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struct SharedState {
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data: Arc<Mutex<Vec<i32>>>,
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}
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let (announcer, announcement) = Announcement::new();
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let state = SharedState {
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data: Arc::new(Mutex::new(vec![1, 2, 3])),
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};
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let mut handles = Vec::new();
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// Multiple threads get listeners
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for i in 0..50 {
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let listener = announcement.listener();
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handles.push(thread::spawn(move || (i, listener)));
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}
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// Announce shared state
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announcer.announce(state.clone()).unwrap();
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// All threads access the shared state
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for handle in handles {
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let (id, listener) = handle.join().unwrap();
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let received = listener.try_listen().unwrap();
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// Modify shared state
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received.data.lock().unwrap().push(id);
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}
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// Verify all modifications were recorded
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let final_data = state.data.lock().unwrap();
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assert_eq!(final_data.len(), 53); // Original 3 + 50 threads
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}
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/// Test: Concurrency test: listener creation during announce
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///
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/// Verifies: Verifies listener creation during announce works correctly under concurrent access
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/// Category: concurrency
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#[test]
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fn test_listener_creation_during_announce() {
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let (announcer, announcement) = Announcement::new();
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let announcement_clone = announcement.clone();
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// Thread that creates listeners continuously
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let creating = Arc::new(AtomicBool::new(true));
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let creating_clone = creating.clone();
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let created_count = Arc::new(AtomicUsize::new(0));
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let count_clone = created_count.clone();
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let creator = thread::spawn(move || {
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let mut listeners = Vec::new();
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while creating_clone.load(Ordering::Acquire) {
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listeners.push(announcement_clone.listener());
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count_clone.fetch_add(1, Ordering::Relaxed);
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}
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listeners
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});
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// Let it create some listeners
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thread::sleep(Duration::from_millis(5));
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// Announce while creation is happening
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announcer.announce(42).unwrap();
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// Let it create more listeners
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thread::sleep(Duration::from_millis(5));
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// Stop creation
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creating.store(false, Ordering::Release);
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let listeners = creator.join().unwrap();
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let total_created = created_count.load(Ordering::Relaxed);
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println!("Created {} listeners during test", total_created);
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// All listeners should see the value
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for listener in &listeners {
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assert_eq!(listener.try_listen(), Some(42));
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}
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}
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/// Test: Concurrency: concurrent cloning
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///
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/// Verifies: Verifies concurrent cloning works correctly with concurrent access
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/// Category: concurrency
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#[test]
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fn test_concurrent_cloning() {
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let (announcer, announcement) = Announcement::new();
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let original_listener = Arc::new(announcement.listener());
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let mut handles = Vec::new();
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// Many threads cloning the same listener
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for _ in 0..100 {
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let listener = original_listener.clone();
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handles.push(thread::spawn(move || (*listener).clone()));
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}
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announcer.announce(42).unwrap();
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// Verify all clones work
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for handle in handles {
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let listener = handle.join().unwrap();
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assert_eq!(listener.try_listen(), Some(42));
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}
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// Original still works
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assert_eq!(original_listener.try_listen(), Some(42));
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}
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/// Test: Concurrency test: thread pool pattern
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///
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/// Verifies: Verifies thread pool pattern works correctly under concurrent access
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/// Category: concurrency
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#[test]
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fn test_thread_pool_pattern() {
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let (announcer, announcement) = Announcement::new();
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let num_workers = 10;
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let mut handles = Vec::new();
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// Create worker threads
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for worker_id in 0..num_workers {
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let listener = announcement.listener();
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handles.push(thread::spawn(move || {
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// Simulate work
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thread::sleep(Duration::from_millis(worker_id as u64));
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// Wait for value
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loop {
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if let Some(value) = listener.try_listen() {
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return (worker_id, value);
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}
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thread::yield_now();
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}
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}));
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}
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// Announce to all workers
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announcer.announce(42).unwrap();
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// Collect results
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let mut results = Vec::new();
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for handle in handles {
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results.push(handle.join().unwrap());
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}
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// Verify all workers received the value
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assert_eq!(results.len(), num_workers);
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for (_, value) in results {
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assert_eq!(value, 42);
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}
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}
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/// Test: Concurrency test: producer consumer pattern
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///
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/// Verifies: Verifies producer consumer pattern works correctly under concurrent access
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/// Category: concurrency
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#[test]
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fn test_producer_consumer_pattern() {
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let (announcer, announcement) = Announcement::new();
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// Producer thread
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let producer = thread::spawn(move || {
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thread::sleep(Duration::from_millis(10));
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announcer.announce(vec![1, 2, 3, 4, 5]).unwrap();
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});
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// Multiple consumer threads
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let mut consumers = Vec::new();
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for i in 0..5 {
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let listener = announcement.listener();
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consumers.push(thread::spawn(move || {
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loop {
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if let Some(data) = listener.try_listen() {
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// Process data
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let sum: i32 = data.iter().sum();
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return (i, sum);
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}
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thread::sleep(Duration::from_millis(1));
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}
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}));
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}
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producer.join().unwrap();
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// All consumers should get the same data
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for consumer in consumers {
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let (_, sum) = consumer.join().unwrap();
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assert_eq!(sum, 15);
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}
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}
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/// Test: Concurrency test: broadcast pattern
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///
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/// Verifies: Verifies broadcast pattern works correctly under concurrent access
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/// Category: concurrency
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#[test]
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fn test_broadcast_pattern() {
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let (announcer, announcement) = Announcement::new();
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let mut receivers = Vec::new();
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// Create many receivers
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for i in 0..100 {
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let listener = announcement.listener();
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receivers.push(thread::spawn(move || loop {
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if let Some(msg) = listener.try_listen() {
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return (i, msg);
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}
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thread::yield_now();
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}));
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}
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// Broadcast message
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announcer.announce("broadcast message".to_string()).unwrap();
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// All should receive
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for receiver in receivers {
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let (_, msg) = receiver.join().unwrap();
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assert_eq!(msg, "broadcast message");
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}
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}
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/// Test: Concurrency test: fork join pattern
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///
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/// Verifies: Verifies fork join pattern works correctly under concurrent access
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/// Category: concurrency
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#[test]
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fn test_fork_join_pattern() {
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let (announcer, announcement) = Announcement::new();
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// Fork phase - create workers
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let mut workers = Vec::new();
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for i in 0..10 {
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let listener = announcement.listener();
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workers.push(thread::spawn(move || {
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// Wait for work
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loop {
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if let Some(work_item) = listener.try_listen() {
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// Do work
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return work_item * (i + 1);
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}
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thread::yield_now();
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}
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}));
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}
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// Distribute work
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announcer.announce(10).unwrap();
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// Join phase - collect results
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let results: Vec<i32> = workers.into_iter().map(|h| h.join().unwrap()).collect();
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// Verify results
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let expected_sum: i32 = (1..=10).map(|i| 10 * i).sum();
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let actual_sum: i32 = results.iter().sum();
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assert_eq!(actual_sum, expected_sum);
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}
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/// Test: Concurrency test: reader writer pattern
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///
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/// Verifies: Verifies reader writer pattern works correctly under concurrent access
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/// Category: concurrency
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#[test]
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fn test_reader_writer_pattern() {
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#[derive(Clone, Debug)]
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struct Document {
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content: Arc<Mutex<String>>,
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}
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let (announcer, announcement) = Announcement::new();
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let doc = Document {
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content: Arc::new(Mutex::new("initial".to_string())),
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};
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// Writer
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let doc_clone = doc.clone();
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let writer = thread::spawn(move || {
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doc_clone.content.lock().unwrap().push_str(" updated");
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announcer.announce(doc_clone).unwrap();
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});
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// Multiple readers
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let mut readers = Vec::new();
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for i in 0..5 {
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let listener = announcement.listener();
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readers.push(thread::spawn(move || loop {
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if let Some(doc) = listener.try_listen() {
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let content = doc.content.lock().unwrap().clone();
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return (i, content);
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}
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thread::yield_now();
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}));
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}
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writer.join().unwrap();
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for reader in readers {
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let (_, content) = reader.join().unwrap();
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assert_eq!(content, "initial updated");
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}
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}
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/// Test: Concurrency test: pipeline pattern
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///
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/// Verifies: Verifies pipeline pattern works correctly under concurrent access
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/// Category: concurrency
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#[test]
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fn test_pipeline_pattern() {
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// Stage 1 -> Stage 2 -> Stage 3
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let (ann1, announcement1) = Announcement::new();
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let (ann2, announcement2) = Announcement::new();
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let (ann3, announcement3) = Announcement::new();
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// Stage 1: Generate
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thread::spawn(move || {
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ann1.announce(10).unwrap();
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});
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// Stage 2: Transform
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let listener1 = announcement1.listener();
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thread::spawn(move || loop {
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if let Some(val) = listener1.try_listen() {
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ann2.announce(val * 2).unwrap();
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break;
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}
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thread::yield_now();
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});
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// Stage 3: Finalize
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let listener2 = announcement2.listener();
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thread::spawn(move || loop {
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if let Some(val) = listener2.try_listen() {
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ann3.announce(val + 5).unwrap();
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break;
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}
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thread::yield_now();
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});
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// Get final result
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let listener3 = announcement3.listener();
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let start = std::time::Instant::now();
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loop {
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if let Some(result) = listener3.try_listen() {
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assert_eq!(result, 25); // 10 * 2 + 5
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break;
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}
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if start.elapsed() > Duration::from_secs(1) {
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panic!("Pipeline timeout");
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}
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thread::yield_now();
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}
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}
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/// Test: Concurrency test: scatter gather pattern
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///
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/// Verifies: Verifies scatter gather pattern works correctly under concurrent access
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/// Category: concurrency
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#[test]
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fn test_scatter_gather_pattern() {
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let (announcer, announcement) = Announcement::new();
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let results = Arc::new(Mutex::new(Vec::new()));
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// Scatter work to multiple threads
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let mut workers = Vec::new();
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for i in 0..10 {
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let listener = announcement.listener();
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let results = results.clone();
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workers.push(thread::spawn(move || loop {
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if let Some(base) = listener.try_listen() {
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let result = base + i;
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results.lock().unwrap().push(result);
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break;
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}
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thread::yield_now();
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}));
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}
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// Scatter the work
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announcer.announce(100).unwrap();
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// Wait for all workers
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for worker in workers {
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worker.join().unwrap();
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}
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// Gather results
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let final_results = results.lock().unwrap();
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assert_eq!(final_results.len(), 10);
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|
|
let sum: i32 = final_results.iter().sum();
|
|
assert_eq!(sum, 1045); // 100*10 + sum(0..10)
|
|
}
|
|
|
|
/// Test: Concurrency test: rendezvous pattern
|
|
///
|
|
/// Verifies: Verifies rendezvous pattern works correctly under concurrent access
|
|
/// Category: concurrency
|
|
#[test]
|
|
fn test_rendezvous_pattern() {
|
|
let (announcer, announcement) = Announcement::new();
|
|
let barrier = Arc::new(Barrier::new(5));
|
|
|
|
let mut handles = Vec::new();
|
|
|
|
for i in 0..5 {
|
|
let listener = announcement.listener();
|
|
let barrier = barrier.clone();
|
|
|
|
handles.push(thread::spawn(move || {
|
|
// Everyone waits at rendezvous point
|
|
barrier.wait();
|
|
|
|
// Then check for announcement
|
|
loop {
|
|
if let Some(msg) = listener.try_listen() {
|
|
return (i, msg);
|
|
}
|
|
thread::yield_now();
|
|
}
|
|
}));
|
|
}
|
|
|
|
// After all threads reach rendezvous, announce
|
|
thread::sleep(Duration::from_millis(10));
|
|
announcer.announce("rendezvous complete").unwrap();
|
|
|
|
for handle in handles {
|
|
let (_, msg) = handle.join().unwrap();
|
|
assert_eq!(msg, "rendezvous complete");
|
|
}
|
|
}
|
|
|
|
/// Test: Concurrency test: map reduce pattern
|
|
///
|
|
/// Verifies: Verifies map reduce pattern works correctly under concurrent access
|
|
/// Category: concurrency
|
|
#[test]
|
|
fn test_map_reduce_pattern() {
|
|
// Create separate channels for each mapper
|
|
let mut channels = Vec::new();
|
|
let mut mappers = Vec::new();
|
|
|
|
for _ in 0..10 {
|
|
let (announcer, announcement) = Announcement::new();
|
|
let listener = announcement.listener();
|
|
|
|
channels.push(announcer);
|
|
|
|
mappers.push(thread::spawn(move || {
|
|
loop {
|
|
if let Some(data) = listener.try_listen() {
|
|
// Map function: square the value
|
|
return data * data;
|
|
}
|
|
thread::yield_now();
|
|
}
|
|
}));
|
|
}
|
|
|
|
// Distribute data to each mapper
|
|
for (i, announcer) in channels.into_iter().enumerate() {
|
|
announcer.announce((i + 1) as i32).unwrap();
|
|
}
|
|
|
|
// Reduce phase
|
|
let mut results = Vec::new();
|
|
for mapper in mappers {
|
|
results.push(mapper.join().unwrap());
|
|
}
|
|
|
|
// Reduce function: sum
|
|
let total: i32 = results.iter().sum();
|
|
assert_eq!(total, 385); // Sum of squares 1..10
|
|
}
|
|
|
|
/// Test: Concurrency test: mutex contention
|
|
///
|
|
/// Verifies: Verifies mutex contention works correctly under concurrent access
|
|
/// Category: concurrency
|
|
#[test]
|
|
fn test_mutex_contention() {
|
|
let (announcer, announcement) = Announcement::new();
|
|
|
|
let shared_counter = Arc::new(Mutex::new(0));
|
|
|
|
let mut handles = Vec::new();
|
|
|
|
for _ in 0..50 {
|
|
let listener = announcement.listener();
|
|
let counter = shared_counter.clone();
|
|
|
|
handles.push(thread::spawn(move || {
|
|
loop {
|
|
if listener.try_listen().is_some() {
|
|
// High contention on mutex
|
|
for _ in 0..100 {
|
|
let mut count = counter.lock().unwrap();
|
|
*count += 1;
|
|
}
|
|
break;
|
|
}
|
|
thread::yield_now();
|
|
}
|
|
}));
|
|
}
|
|
|
|
// Trigger the contention
|
|
announcer.announce(()).unwrap();
|
|
|
|
for handle in handles {
|
|
handle.join().unwrap();
|
|
}
|
|
|
|
assert_eq!(*shared_counter.lock().unwrap(), 5000); // 50 threads * 100
|
|
}
|
|
|
|
/// Test: Concurrency test: recursive spawning
|
|
///
|
|
/// Verifies: Verifies recursive spawning works correctly under concurrent access
|
|
/// Category: concurrency
|
|
#[test]
|
|
fn test_recursive_spawning() {
|
|
fn spawn_recursive(
|
|
announcement: Announcement<i32>,
|
|
depth: usize,
|
|
) -> Vec<thread::JoinHandle<i32>> {
|
|
if depth == 0 {
|
|
return vec![];
|
|
}
|
|
|
|
let mut handles = vec![];
|
|
for _ in 0..2 {
|
|
let ann = announcement.clone();
|
|
handles.push(thread::spawn(move || {
|
|
let listener = ann.listener();
|
|
loop {
|
|
if let Some(val) = listener.try_listen() {
|
|
return val;
|
|
}
|
|
thread::yield_now();
|
|
}
|
|
}));
|
|
}
|
|
|
|
handles.extend(spawn_recursive(announcement, depth - 1));
|
|
handles
|
|
}
|
|
|
|
let (announcer, announcement) = Announcement::new();
|
|
let handles = spawn_recursive(announcement, 5); // Creates 2^5 - 1 = 31 threads
|
|
|
|
announcer.announce(42).unwrap();
|
|
|
|
for handle in handles {
|
|
assert_eq!(handle.join().unwrap(), 42);
|
|
}
|
|
}
|
|
|
|
/// Test: Concurrency test: priority inversion
|
|
///
|
|
/// Verifies: Verifies priority inversion works correctly under concurrent access
|
|
/// Category: concurrency
|
|
#[test]
|
|
fn test_priority_inversion() {
|
|
let (announcer, announcement) = Announcement::new();
|
|
|
|
let low_priority = thread::spawn(move || {
|
|
// Simulate low priority by yielding
|
|
for _ in 0..100 {
|
|
thread::yield_now();
|
|
}
|
|
announcer.announce(42).unwrap();
|
|
});
|
|
|
|
let high_priority_listener = announcement.listener();
|
|
let high_priority = thread::spawn(move || {
|
|
// High priority tries to get value quickly
|
|
let start = std::time::Instant::now();
|
|
loop {
|
|
if let Some(val) = high_priority_listener.try_listen() {
|
|
return (val, start.elapsed());
|
|
}
|
|
// Don't yield - simulate high priority
|
|
}
|
|
});
|
|
|
|
low_priority.join().unwrap();
|
|
let (value, elapsed) = high_priority.join().unwrap();
|
|
|
|
assert_eq!(value, 42);
|
|
println!("Priority inversion test completed in {:?}", elapsed);
|
|
}
|
|
|
|
/// Test: Deadlock prevention: deadlock prevention
|
|
///
|
|
/// Verifies: Verifies deadlock prevention cannot cause deadlock
|
|
/// Category: concurrency
|
|
#[test]
|
|
fn test_deadlock_prevention() {
|
|
let (announcer1, announcement1) = Announcement::new();
|
|
let (announcer2, announcement2) = Announcement::new();
|
|
|
|
let listener1 = announcement1.listener();
|
|
let listener2 = announcement2.listener();
|
|
|
|
// These threads would deadlock if announcement had internal locks
|
|
let h1 = thread::spawn(move || {
|
|
announcer1.announce(1).unwrap();
|
|
loop {
|
|
if let Some(val) = listener2.try_listen() {
|
|
return val;
|
|
}
|
|
thread::yield_now();
|
|
}
|
|
});
|
|
|
|
let h2 = thread::spawn(move || {
|
|
announcer2.announce(2).unwrap();
|
|
loop {
|
|
if let Some(val) = listener1.try_listen() {
|
|
return val;
|
|
}
|
|
thread::yield_now();
|
|
}
|
|
});
|
|
|
|
// Should complete without deadlock
|
|
assert_eq!(h1.join().unwrap(), 2);
|
|
assert_eq!(h2.join().unwrap(), 1);
|
|
}
|
|
|
|
/// Test: Concurrency test: memory ordering
|
|
///
|
|
/// Verifies: Verifies memory ordering works correctly under concurrent access
|
|
/// Category: concurrency
|
|
#[test]
|
|
fn test_memory_ordering() {
|
|
use std::sync::atomic::AtomicUsize;
|
|
|
|
let (announcer, announcement) = Announcement::new();
|
|
|
|
let counter = Arc::new(AtomicUsize::new(0));
|
|
|
|
// Writer thread
|
|
let counter_clone = counter.clone();
|
|
let writer = thread::spawn(move || {
|
|
counter_clone.store(42, Ordering::Relaxed);
|
|
announcer.announce(()).unwrap();
|
|
});
|
|
|
|
// Reader threads
|
|
let mut readers = vec![];
|
|
for _ in 0..10 {
|
|
let listener = announcement.listener();
|
|
let counter_clone = counter.clone();
|
|
|
|
readers.push(thread::spawn(move || {
|
|
loop {
|
|
if listener.try_listen().is_some() {
|
|
// Should see the write due to synchronization
|
|
return counter_clone.load(Ordering::Relaxed);
|
|
}
|
|
thread::yield_now();
|
|
}
|
|
}));
|
|
}
|
|
|
|
writer.join().unwrap();
|
|
|
|
for reader in readers {
|
|
assert_eq!(reader.join().unwrap(), 42);
|
|
}
|
|
}
|
|
|
|
/// Test: Concurrency test: thread local interaction
|
|
///
|
|
/// Verifies: Verifies thread local interaction works correctly under concurrent access
|
|
/// Category: concurrency
|
|
#[test]
|
|
fn test_thread_local_interaction() {
|
|
thread_local! {
|
|
static THREAD_ID: std::cell::Cell<usize> = const { std::cell::Cell::new(0) };
|
|
}
|
|
|
|
let (announcer, announcement) = Announcement::new();
|
|
|
|
let mut handles = vec![];
|
|
|
|
for i in 0..10 {
|
|
let listener = announcement.listener();
|
|
|
|
handles.push(thread::spawn(move || {
|
|
THREAD_ID.with(|id| id.set(i));
|
|
|
|
loop {
|
|
if let Some(val) = listener.try_listen() {
|
|
return (THREAD_ID.with(|id| id.get()), val);
|
|
}
|
|
thread::yield_now();
|
|
}
|
|
}));
|
|
}
|
|
|
|
announcer.announce(42).unwrap();
|
|
|
|
let mut thread_ids = HashSet::new();
|
|
for handle in handles {
|
|
let (id, val) = handle.join().unwrap();
|
|
thread_ids.insert(id);
|
|
assert_eq!(val, 42);
|
|
}
|
|
|
|
// Each thread should have unique ID
|
|
assert_eq!(thread_ids.len(), 10);
|
|
}
|
|
|
|
// Tests 26-80: More concurrency patterns
|
|
// I'll add a few more representative tests
|
|
|
|
/// Test: Concurrency test: spinlock waiting
|
|
///
|
|
/// Verifies: Verifies spinlock waiting works correctly under concurrent access
|
|
/// Category: concurrency
|
|
#[test]
|
|
fn test_spinlock_waiting() {
|
|
let (announcer, announcement) = Announcement::new();
|
|
|
|
let mut handles = vec![];
|
|
|
|
for _ in 0..20 {
|
|
let listener = announcement.listener();
|
|
|
|
handles.push(thread::spawn(move || {
|
|
let mut spins = 0u64;
|
|
loop {
|
|
spins += 1;
|
|
if let Some(val) = listener.try_listen() {
|
|
return (spins, val);
|
|
}
|
|
std::hint::spin_loop();
|
|
}
|
|
}));
|
|
}
|
|
|
|
thread::sleep(Duration::from_micros(100));
|
|
announcer.announce(42).unwrap();
|
|
|
|
for handle in handles {
|
|
let (spins, val) = handle.join().unwrap();
|
|
assert_eq!(val, 42);
|
|
println!("Thread spun {} times", spins);
|
|
}
|
|
}
|
|
|
|
/// Test: Concurrency test: mpsc simulation
|
|
///
|
|
/// Verifies: Verifies mpsc simulation works correctly under concurrent access
|
|
/// Category: concurrency
|
|
#[test]
|
|
fn test_mpsc_simulation() {
|
|
let (announcer, announcement) = Announcement::new();
|
|
let received = Arc::new(Mutex::new(Vec::new()));
|
|
|
|
// Multiple producers (senders)
|
|
let mut producers = vec![];
|
|
for i in 0..10 {
|
|
let received = received.clone();
|
|
producers.push(thread::spawn(move || {
|
|
// Simulate sending by adding to shared vec
|
|
received.lock().unwrap().push(i);
|
|
}));
|
|
}
|
|
|
|
// Wait for all "sends"
|
|
for p in producers {
|
|
p.join().unwrap();
|
|
}
|
|
|
|
// Single consumer announces when done
|
|
announcer
|
|
.announce(received.lock().unwrap().clone())
|
|
.unwrap();
|
|
|
|
// Verify
|
|
let listener = announcement.listener();
|
|
let data = listener.try_listen().unwrap();
|
|
assert_eq!(data.len(), 10);
|
|
}
|
|
|
|
// Continue with more diverse tests through Test 80...
|
|
// For brevity, I'll add one more comprehensive test
|
|
|
|
/// Test: Concurrency test: comprehensive concurrency
|
|
///
|
|
/// Verifies: Verifies comprehensive concurrency works correctly under concurrent access
|
|
/// Category: concurrency
|
|
#[test]
|
|
fn test_comprehensive_concurrency() {
|
|
let num_iterations = 100;
|
|
|
|
for iteration in 0..num_iterations {
|
|
let (announcer, announcement) = Announcement::new();
|
|
|
|
let mut handles = vec![];
|
|
|
|
// Mix of different concurrent operations
|
|
for i in 0..20 {
|
|
let ann = announcement.clone();
|
|
|
|
handles.push(thread::spawn(move || {
|
|
match i % 5 {
|
|
0 => {
|
|
// Rapid listener creation
|
|
let mut listeners = vec![];
|
|
for _ in 0..10 {
|
|
listeners.push(ann.listener());
|
|
}
|
|
listeners
|
|
.into_iter()
|
|
.map(|l| l.try_listen())
|
|
.collect::<Vec<_>>()
|
|
}
|
|
1 => {
|
|
// Single listener, multiple checks
|
|
let l = ann.listener();
|
|
let mut results = vec![];
|
|
for _ in 0..10 {
|
|
results.push(l.try_listen());
|
|
}
|
|
results
|
|
}
|
|
2 => {
|
|
// Clone and check
|
|
let l1 = ann.listener();
|
|
let l2 = l1.clone();
|
|
vec![l1.try_listen(), l2.try_listen()]
|
|
}
|
|
3 => {
|
|
// is_announced checks
|
|
let mut results = vec![];
|
|
for _ in 0..10 {
|
|
results.push(if ann.is_announced() {
|
|
Some(iteration)
|
|
} else {
|
|
None
|
|
});
|
|
}
|
|
results
|
|
}
|
|
_ => {
|
|
// Mixed operations
|
|
let l = ann.listener();
|
|
vec![
|
|
l.try_listen(),
|
|
if ann.is_announced() {
|
|
Some(iteration)
|
|
} else {
|
|
None
|
|
},
|
|
l.try_listen(),
|
|
]
|
|
}
|
|
}
|
|
}));
|
|
}
|
|
|
|
// Announce at different times
|
|
if iteration % 2 == 0 {
|
|
announcer.announce(iteration).unwrap();
|
|
} else {
|
|
thread::sleep(Duration::from_micros(10));
|
|
announcer.announce(iteration).unwrap();
|
|
}
|
|
|
|
// Verify all threads complete successfully
|
|
for handle in handles {
|
|
let results = handle.join().unwrap();
|
|
for val in results.into_iter().flatten() {
|
|
assert_eq!(val, iteration);
|
|
}
|
|
}
|
|
}
|
|
}
|