diff options
Diffstat (limited to 'src/doc/book/listings/ch16-fearless-concurrency/listing-16-13')
4 files changed, 49 insertions, 0 deletions
diff --git a/src/doc/book/listings/ch16-fearless-concurrency/listing-16-13/Cargo.lock b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-13/Cargo.lock new file mode 100644 index 000000000..8e7ba9cf5 --- /dev/null +++ b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-13/Cargo.lock @@ -0,0 +1,6 @@ +# This file is automatically @generated by Cargo. +# It is not intended for manual editing. +[[package]] +name = "shared-state" +version = "0.1.0" + diff --git a/src/doc/book/listings/ch16-fearless-concurrency/listing-16-13/Cargo.toml b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-13/Cargo.toml new file mode 100644 index 000000000..da297eaba --- /dev/null +++ b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-13/Cargo.toml @@ -0,0 +1,6 @@ +[package] +name = "shared-state" +version = "0.1.0" +edition = "2021" + +[dependencies] diff --git a/src/doc/book/listings/ch16-fearless-concurrency/listing-16-13/output.txt b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-13/output.txt new file mode 100644 index 000000000..ea6963903 --- /dev/null +++ b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-13/output.txt @@ -0,0 +1,15 @@ +$ cargo run + Compiling shared-state v0.1.0 (file:///projects/shared-state) +error[E0382]: use of moved value: `counter` + --> src/main.rs:9:36 + | +5 | let counter = Mutex::new(0); + | ------- move occurs because `counter` has type `Mutex<i32>`, which does not implement the `Copy` trait +... +9 | let handle = thread::spawn(move || { + | ^^^^^^^ value moved into closure here, in previous iteration of loop +10 | let mut num = counter.lock().unwrap(); + | ------- use occurs due to use in closure + +For more information about this error, try `rustc --explain E0382`. +error: could not compile `shared-state` due to previous error diff --git a/src/doc/book/listings/ch16-fearless-concurrency/listing-16-13/src/main.rs b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-13/src/main.rs new file mode 100644 index 000000000..4e380a59a --- /dev/null +++ b/src/doc/book/listings/ch16-fearless-concurrency/listing-16-13/src/main.rs @@ -0,0 +1,22 @@ +use std::sync::Mutex; +use std::thread; + +fn main() { + let counter = Mutex::new(0); + let mut handles = vec![]; + + for _ in 0..10 { + let handle = thread::spawn(move || { + let mut num = counter.lock().unwrap(); + + *num += 1; + }); + handles.push(handle); + } + + for handle in handles { + handle.join().unwrap(); + } + + println!("Result: {}", *counter.lock().unwrap()); +} |