Решение на упр.09 задача 1 от Димитър Колев
Резултати
- 5 точки от тестове
- 0 бонус точки
- 5 точки общо
- 5 успешни тест(а)
- 0 неуспешни тест(а)
Код
use std::collections::HashMap;
use std::sync::{Arc, Mutex};
#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
pub struct Id(usize);
struct Listener<S> {
id: Id,
callback: Box<dyn FnMut(&mut S) + Send>,
}
struct Inner<S> {
listeners: HashMap<String, Arc<Mutex<Vec<Listener<S>>>>>,
ids: HashMap<usize, String>,
next_id: usize,
}
pub struct EventDispatcher<S> {
inner: Arc<Mutex<Inner<S>>>,
}
impl<S> EventDispatcher<S> {
pub fn new() -> Self {
EventDispatcher {
inner: Arc::new(Mutex::new(Inner {
listeners: HashMap::new(),
ids: HashMap::new(),
next_id: 0,
})),
}
}
pub fn on(&self, event: &str, callback: Box<dyn FnMut(&mut S) + Send>) -> Id {
let mut inner = self.inner.lock().unwrap();
let id = Id(inner.next_id);
inner.next_id += 1;
inner.ids.insert(id.0, event.to_string());
let listeners = inner
.listeners
.entry(event.to_string())
.or_insert_with(|| Arc::new(Mutex::new(Vec::new())))
.clone();
drop(inner);
let mut listeners = listeners.lock().unwrap();
listeners.push(Listener { id, callback });
id
}
pub fn off(&self, id: Id) -> Option<Box<dyn FnMut(&mut S) + Send>> {
let mut inner = self.inner.lock().unwrap();
if let Some(event) = inner.ids.remove(&id.0) {
if let Some(listeners) = inner.listeners.get(&event).cloned() {
drop(inner);
let mut listeners = listeners.lock().unwrap();
if let Some(idx) = listeners.iter().position(|x| x.id == id) {
return Some(listeners.remove(idx).callback);
}
}
}
None
}
pub fn emit(&self, event: &str, state: &mut S) {
let listeners = {
let inner = self.inner.lock().unwrap();
inner.listeners.get(event).cloned()
};
if let Some(listeners) = listeners {
let mut listeners = listeners.lock().unwrap();
for listener in listeners.iter_mut() {
(listener.callback)(state);
}
}
}
}
impl<S> Clone for EventDispatcher<S> {
fn clone(&self) -> Self {
EventDispatcher {
inner: Arc::clone(&self.inner),
}
}
}
Лог от изпълнението
Updating crates.io index
Locking 17 packages to latest compatible versions
Compiling proc-macro2 v1.0.103
Compiling quote v1.0.42
Compiling unicode-ident v1.0.22
Compiling futures-core v0.3.31
Compiling futures-sink v0.3.31
Compiling futures-channel v0.3.31
Compiling pin-utils v0.1.0
Compiling memchr v2.7.6
Compiling syn v2.0.111
Compiling slab v0.4.11
Compiling futures-task v0.3.31
Compiling futures-io v0.3.31
Compiling pin-project-lite v0.2.16
Compiling solution v0.1.0 (/tmp/d20251211-1757769-1m7x79j/solution)
Compiling futures-macro v0.3.31
Compiling futures-util v0.3.31
Compiling futures-executor v0.3.31
Compiling futures v0.3.31
Finished `test` profile [unoptimized + debuginfo] target(s) in 8.72s
Running tests/solution_test.rs (target/debug/deps/solution_test-ee0783488e12dce9)
running 5 tests
test solution_test::test_basic_run2 ... ok
test solution_test::test_basic_run1 ... ok
test solution_test::test_multithreaded_run1 ... ok
test solution_test::test_multithreaded_run2 ... ok
test solution_test::test_reentrant_run ... ok
test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s