Ejercicios 78/94
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@ -6,8 +6,6 @@
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// The program should wait until all the spawned threads have finished and
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// should collect their return values into a vector.
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// I AM NOT DONE
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use std::thread;
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use std::time::{Duration, Instant};
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@ -24,7 +22,7 @@ fn main() {
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let mut results: Vec<u128> = vec![];
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for handle in handles {
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// TODO: a struct is returned from thread::spawn, can you use it?
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results.push(handle.join().unwrap());
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}
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if results.len() != 10 {
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@ -3,9 +3,7 @@
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// Building on the last exercise, we want all of the threads to complete their work but this time
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// the spawned threads need to be in charge of updating a shared value: JobStatus.jobs_completed
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// I AM NOT DONE
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use std::sync::Arc;
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use std::sync::{Arc, Mutex};
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use std::thread;
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use std::time::Duration;
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@ -14,21 +12,18 @@ struct JobStatus {
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}
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fn main() {
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let status = Arc::new(JobStatus { jobs_completed: 0 });
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let status = Arc::new(Mutex::new(JobStatus { jobs_completed: 0 }));
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let mut handles = vec![];
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for _ in 0..10 {
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let status_shared = Arc::clone(&status);
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let handle = thread::spawn(move || {
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thread::sleep(Duration::from_millis(250));
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// TODO: You must take an action before you update a shared value
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status_shared.jobs_completed += 1;
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status_shared.lock().unwrap().jobs_completed += 1;
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});
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handles.push(handle);
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}
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for handle in handles {
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handle.join().unwrap();
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// TODO: Print the value of the JobStatus.jobs_completed. Did you notice anything
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// interesting in the output? Do you have to 'join' on all the handles?
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println!("jobs completed {}", ???);
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println!("jobs completed {}", status.lock().unwrap().jobs_completed);
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}
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}
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@ -1,8 +1,6 @@
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// threads3.rs
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// Execute `rustlings hint threads3` or use the `hint` watch subcommand for a hint.
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// I AM NOT DONE
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use std::sync::mpsc;
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use std::sync::Arc;
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use std::thread;
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@ -28,11 +26,12 @@ fn send_tx(q: Queue, tx: mpsc::Sender<u32>) -> () {
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let qc = Arc::new(q);
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let qc1 = Arc::clone(&qc);
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let qc2 = Arc::clone(&qc);
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let tx1 = tx.clone();
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thread::spawn(move || {
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for val in &qc1.first_half {
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println!("sending {:?}", val);
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tx.send(*val).unwrap();
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tx1.send(*val).unwrap();
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thread::sleep(Duration::from_secs(1));
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}
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});
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