1 // Copyright 2012-2014 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 #![allow(unknown_features)]
12 #![feature(box_syntax)]
13 #![feature(unboxed_closures)]
16 A somewhat reduced test case to expose some Valgrind issues.
18 This originally came from the word-count benchmark.
21 pub fn map(filename: String, mut emit: map_reduce::putter) {
22 emit(filename, "1".to_string());
26 use std::collections::HashMap;
27 use std::sync::mpsc::{channel, Sender};
29 use std::thread::Thread;
31 pub type putter<'a> = Box<FnMut(String, String) + 'a>;
33 pub type mapper = extern fn(String, putter);
35 enum ctrl_proto { find_reducer(Vec<u8>, Sender<int>), mapper_done, }
37 fn start_mappers(ctrl: Sender<ctrl_proto>, inputs: Vec<String>) {
39 let ctrl = ctrl.clone();
41 Thread::spawn(move|| map_task(ctrl.clone(), i.clone()) );
45 fn map_task(ctrl: Sender<ctrl_proto>, input: String) {
46 let mut intermediates = HashMap::new();
48 fn emit(im: &mut HashMap<String, int>,
49 ctrl: Sender<ctrl_proto>, key: String,
51 if im.contains_key(&key) {
54 let (tx, rx) = channel();
55 println!("sending find_reducer");
56 ctrl.send(ctrl_proto::find_reducer(key.as_bytes().to_vec(), tx)).unwrap();
57 println!("receiving");
58 let c = rx.recv().unwrap();
63 let ctrl_clone = ctrl.clone();
64 ::map(input, box |a,b| emit(&mut intermediates, ctrl.clone(), a, b) );
65 ctrl_clone.send(ctrl_proto::mapper_done).unwrap();
68 pub fn map_reduce(inputs: Vec<String>) {
69 let (tx, rx) = channel();
71 // This task becomes the master control task. It spawns others
74 let mut reducers: HashMap<String, int>;
76 reducers = HashMap::new();
78 start_mappers(tx, inputs.clone());
80 let mut num_mappers = inputs.len() as int;
82 while num_mappers > 0 {
83 match rx.recv().unwrap() {
84 ctrl_proto::mapper_done => { num_mappers -= 1; }
85 ctrl_proto::find_reducer(k, cc) => {
87 match reducers.get(&str::from_utf8(&k).unwrap().to_string()) {
88 Some(&_c) => { c = _c; }
99 map_reduce::map_reduce(
100 vec!("../src/test/run-pass/hashmap-memory.rs".to_string()));