Created
October 15, 2018 04:47
-
-
Save rust-play/4460c62e6963112a7fcb258de08abf9a to your computer and use it in GitHub Desktop.
Code shared from the Rust Playground
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| use std::cell::RefCell; | |
| use std::collections::BinaryHeap; | |
| use std::collections::binary_heap::PeekMut; | |
| #[derive(Ord, PartialOrd, Eq, PartialEq)] | |
| struct Task(u32); | |
| struct Foo { | |
| heap: RefCell<BinaryHeap<Task>>, | |
| } | |
| impl Foo { | |
| pub fn run_for(self: &Foo) { | |
| loop { | |
| let mut heap = self.heap.borrow_mut(); | |
| let entry = if let Some(entry) = heap.peek_mut() { | |
| entry | |
| } else { | |
| break; | |
| }; | |
| if entry.0 < 50 { | |
| break; | |
| } | |
| let task = PeekMut::pop(entry); | |
| // Try uncommenting these: | |
| //drop(entry); | |
| //drop(heap); | |
| // scheduled_tasks MUST be unborrowed before calling this | |
| self.run_single_task(task); | |
| } | |
| } | |
| fn run_single_task(self: &Foo, _task: Task) { | |
| self.heap.borrow_mut(); | |
| println!("We made it"); | |
| } | |
| } | |
| fn main() { | |
| let mut heap = BinaryHeap::new(); | |
| heap.push(Task(32)); | |
| heap.push(Task(100)); | |
| let foo = Foo { heap: heap.into() }; | |
| foo.run_for(); | |
| } |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment