init

src/lib.rs

@@ -0,0 +1,80 @@
+use std::{sync::mpsc, thread, time::Instant};
+
+pub mod job;
+pub mod service;
+
+/// Rally Function
+///
+/// This executes a thread for every item executing `f(&item) -> X`. Whatever function returns first is returned while every other thread is killed.
+pub fn rally<T: Send + Sync + 'static, F, X: Send + 'static>(items: Vec<T>, f: F) -> (T, X)
+where
+    F: Fn(&T) -> X + Send + Sync + Copy + 'static,
+{
+    let (tx, rx) = mpsc::channel();
+    let items_len = items.len();
+    let mut handles = Vec::new();
+
+    for item in items {
+        let tx = tx.clone();
+        let item_ref = item;
+        let f = f;
+
+        let handle = thread::spawn(move || {
+            let start = Instant::now();
+            let result = f(&item_ref);
+            let elapsed = start.elapsed();
+            let _ = tx.send((item_ref, result, elapsed));
+        });
+        handles.push(handle);
+    }
+
+    drop(tx);
+
+    let (fastest_item, fastest_result, elapsed) = rx.recv().unwrap();
+
+    for handle in handles {
+        handle.thread().unpark();
+    }
+
+    log::info!("Rally ended with {items_len} items in {elapsed:?}");
+
+    (fastest_item, fastest_result)
+}
+
+// TODO : async version
+/*
+pub fn rally_async<T: Send + Sync + 'static, F, X: Send + 'static>(items: Vec<T>, f: F) -> (T, X)
+where
+    F: AsyncFn(&T) -> X + Send + Sync + Copy + 'static,
+{
+    let (tx, rx) = mpsc::channel();
+    let mut handles = Vec::new();
+
+    for item in items {
+        let tx = tx.clone();
+        let item_ref = item;
+        let f = f;
+
+        tokio::task::spawn()
+
+        let handle = thread::spawn(move || {
+            let start = Instant::now();
+            let result = f(&item_ref);
+            let elapsed = start.elapsed();
+            let _ = tx.send((item_ref, result, elapsed));
+        });
+        handles.push(handle);
+    }
+
+    drop(tx);
+
+    let (fastest_item, fastest_result, _) = rx.recv().unwrap();
+
+    for handle in handles {
+        handle.thread().unpark();
+    }
+
+    (fastest_item, fastest_result)
+}
+
+    */