mirror of
https://github.com/rust-lang/rustlings.git
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done till exercises/smart_pointers/box1
This commit is contained in:
ben1009
parent
b84ba2b903
commit
f15058ab29
58
Cargo.lock
generated
58
Cargo.lock
generated
@ -171,6 +171,17 @@ version = "0.3.3"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "3dcaa9ae7725d12cdb85b3ad99a434db70b468c09ded17e012d86b5c1010f7a7"
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[[package]]
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name = "getrandom"
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version = "0.2.8"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "c05aeb6a22b8f62540c194aac980f2115af067bfe15a0734d7277a768d396b31"
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dependencies = [
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"cfg-if 1.0.0",
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"libc",
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"wasi",
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]
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[[package]]
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name = "glob"
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version = "0.3.0"
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@ -266,9 +277,9 @@ checksum = "830d08ce1d1d941e6b30645f1a0eb5643013d835ce3779a5fc208261dbe10f55"
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[[package]]
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name = "libc"
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version = "0.2.100"
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version = "0.2.139"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "a1fa8cddc8fbbee11227ef194b5317ed014b8acbf15139bd716a18ad3fe99ec5"
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checksum = "201de327520df007757c1f0adce6e827fe8562fbc28bfd9c15571c66ca1f5f79"
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[[package]]
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name = "log"
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@ -384,6 +395,12 @@ version = "1.10.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "87f3e037eac156d1775da914196f0f37741a274155e34a0b7e427c35d2a2ecb9"
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[[package]]
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name = "ppv-lite86"
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version = "0.2.17"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "5b40af805b3121feab8a3c29f04d8ad262fa8e0561883e7653e024ae4479e6de"
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[[package]]
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name = "predicates"
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version = "1.0.8"
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@ -431,6 +448,36 @@ dependencies = [
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"proc-macro2",
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]
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[[package]]
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name = "rand"
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version = "0.8.5"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "34af8d1a0e25924bc5b7c43c079c942339d8f0a8b57c39049bef581b46327404"
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dependencies = [
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"libc",
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"rand_chacha",
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"rand_core",
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]
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[[package]]
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name = "rand_chacha"
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version = "0.3.1"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "e6c10a63a0fa32252be49d21e7709d4d4baf8d231c2dbce1eaa8141b9b127d88"
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dependencies = [
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"ppv-lite86",
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"rand_core",
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]
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[[package]]
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name = "rand_core"
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version = "0.6.4"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "ec0be4795e2f6a28069bec0b5ff3e2ac9bafc99e6a9a7dc3547996c5c816922c"
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dependencies = [
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"getrandom",
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]
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[[package]]
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name = "redox_syscall"
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version = "0.2.10"
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@ -469,6 +516,7 @@ dependencies = [
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"indicatif",
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"notify",
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"predicates",
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"rand",
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"regex",
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"serde",
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"serde_json",
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@ -592,6 +640,12 @@ dependencies = [
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"winapi-util",
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]
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[[package]]
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name = "wasi"
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version = "0.11.0+wasi-snapshot-preview1"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
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[[package]]
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name = "winapi"
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version = "0.2.8"
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@ -18,6 +18,7 @@ serde = { version = "1.0", features = ["derive"] }
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serde_json = "1.0.81"
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home = "0.5.3"
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glob = "0.3.0"
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rand = "0.8.5"
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[[bin]]
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name = "rustlings"
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@ -27,3 +28,4 @@ path = "src/main.rs"
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assert_cmd = "0.11.0"
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predicates = "1.0.1"
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glob = "0.3.0"
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rand = "0.8.5"
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@ -6,13 +6,14 @@
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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 rand::Rng;
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use std::thread;
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use std::time::{Duration, Instant};
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fn main() {
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let mut handles = vec![];
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// let rng = rand::thread_rng();
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for i in 0..10 {
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handles.push(thread::spawn(move || {
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let start = Instant::now();
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@ -22,15 +23,17 @@ fn main() {
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}));
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}
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print!("next move, handler len {} \n", handles.len());
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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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panic!("Oh no! All the spawned threads did not finish!");
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}
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println!();
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for (i, result) in results.into_iter().enumerate() {
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println!("thread {} took {}ms", i, result);
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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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@ -14,14 +12,14 @@ 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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for i 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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thread::sleep(Duration::from_millis(250 + i * 10));
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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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@ -29,6 +27,6 @@ fn main() {
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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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@ -28,6 +26,7 @@ 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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@ -40,7 +39,7 @@ fn send_tx(q: Queue, tx: mpsc::Sender<u32>) -> () {
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thread::spawn(move || {
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for val in &qc2.second_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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