119 lines
3.5 KiB
Rust
119 lines
3.5 KiB
Rust
// Copyright 2013-2014 The Rust Project Developers. See the COPYRIGHT
|
|
// file at the top-level directory of this distribution and at
|
|
// http://rust-lang.org/COPYRIGHT.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
|
|
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
|
|
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
|
|
// option. This file may not be copied, modified, or distributed
|
|
// except according to those terms.
|
|
|
|
// Tests that a heterogeneous list of existential types can be put inside an Arc
|
|
// and shared between threads as long as all types fulfill Send.
|
|
|
|
// ignore-emscripten no threads support
|
|
#![allow(unknown_features)]
|
|
#![feature(box_syntax, std_misc)]
|
|
|
|
use std::sync::Arc;
|
|
use std::sync::mpsc::channel;
|
|
use std::thread;
|
|
|
|
trait Pet {
|
|
fn name(&self, blk: Box<FnMut(&str)>);
|
|
fn num_legs(&self) -> usize;
|
|
fn of_good_pedigree(&self) -> bool;
|
|
}
|
|
|
|
struct Catte {
|
|
num_whiskers: usize,
|
|
name: String,
|
|
}
|
|
|
|
struct Dogge {
|
|
bark_decibels: usize,
|
|
tricks_known: usize,
|
|
name: String,
|
|
}
|
|
|
|
struct Goldfyshe {
|
|
swim_speed: usize,
|
|
name: String,
|
|
}
|
|
|
|
impl Pet for Catte {
|
|
fn name(&self, mut blk: Box<FnMut(&str)>) { blk(&self.name) }
|
|
fn num_legs(&self) -> usize { 4 }
|
|
fn of_good_pedigree(&self) -> bool { self.num_whiskers >= 4 }
|
|
}
|
|
impl Pet for Dogge {
|
|
fn name(&self, mut blk: Box<FnMut(&str)>) { blk(&self.name) }
|
|
fn num_legs(&self) -> usize { 4 }
|
|
fn of_good_pedigree(&self) -> bool {
|
|
self.bark_decibels < 70 || self.tricks_known > 20
|
|
}
|
|
}
|
|
impl Pet for Goldfyshe {
|
|
fn name(&self, mut blk: Box<FnMut(&str)>) { blk(&self.name) }
|
|
fn num_legs(&self) -> usize { 0 }
|
|
fn of_good_pedigree(&self) -> bool { self.swim_speed >= 500 }
|
|
}
|
|
|
|
pub fn main() {
|
|
let catte = Catte { num_whiskers: 7, name: "alonzo_church".to_string() };
|
|
let dogge1 = Dogge {
|
|
bark_decibels: 100,
|
|
tricks_known: 42,
|
|
name: "alan_turing".to_string(),
|
|
};
|
|
let dogge2 = Dogge {
|
|
bark_decibels: 55,
|
|
tricks_known: 11,
|
|
name: "albert_einstein".to_string(),
|
|
};
|
|
let fishe = Goldfyshe {
|
|
swim_speed: 998,
|
|
name: "alec_guinness".to_string(),
|
|
};
|
|
let arc = Arc::new(vec!(box catte as Box<Pet+Sync+Send>,
|
|
box dogge1 as Box<Pet+Sync+Send>,
|
|
box fishe as Box<Pet+Sync+Send>,
|
|
box dogge2 as Box<Pet+Sync+Send>));
|
|
let (tx1, rx1) = channel();
|
|
let arc1 = arc.clone();
|
|
let t1 = thread::spawn(move|| { check_legs(arc1); tx1.send(()); });
|
|
let (tx2, rx2) = channel();
|
|
let arc2 = arc.clone();
|
|
let t2 = thread::spawn(move|| { check_names(arc2); tx2.send(()); });
|
|
let (tx3, rx3) = channel();
|
|
let arc3 = arc.clone();
|
|
let t3 = thread::spawn(move|| { check_pedigree(arc3); tx3.send(()); });
|
|
rx1.recv();
|
|
rx2.recv();
|
|
rx3.recv();
|
|
t1.join();
|
|
t2.join();
|
|
t3.join();
|
|
}
|
|
|
|
fn check_legs(arc: Arc<Vec<Box<Pet+Sync+Send>>>) {
|
|
let mut legs = 0;
|
|
for pet in arc.iter() {
|
|
legs += pet.num_legs();
|
|
}
|
|
assert!(legs == 12);
|
|
}
|
|
fn check_names(arc: Arc<Vec<Box<Pet+Sync+Send>>>) {
|
|
for pet in arc.iter() {
|
|
// FIXME (#22405): Replace `Box::new` with `box` here when/if possible.
|
|
pet.name(Box::new(|name| {
|
|
assert!(name.as_bytes()[0] == 'a' as u8 && name.as_bytes()[1] == 'l' as u8);
|
|
}))
|
|
}
|
|
}
|
|
fn check_pedigree(arc: Arc<Vec<Box<Pet+Sync+Send>>>) {
|
|
for pet in arc.iter() {
|
|
assert!(pet.of_good_pedigree());
|
|
}
|
|
}
|