fix shootout-spectralnorm, broken since Arc cannot unwrap.
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33768c46ec
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@ -1,4 +1,4 @@
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// Copyright 2012-2013-2014 The Rust Project Developers. See the COPYRIGHT
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// Copyright 2012-2014 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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@ -8,8 +8,6 @@
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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// ignore-test arcs no longer unwrap
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extern crate sync;
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use std::from_str::FromStr;
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@ -17,7 +15,6 @@ use std::iter::count;
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use std::cmp::min;
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use std::os;
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use std::vec::from_elem;
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use sync::Arc;
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use sync::RWArc;
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fn A(i: uint, j: uint) -> f64 {
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@ -33,12 +30,18 @@ fn dot(v: &[f64], u: &[f64]) -> f64 {
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}
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fn mult(v: RWArc<~[f64]>, out: RWArc<~[f64]>, f: fn(&~[f64], uint) -> f64) {
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let wait = Arc::new(());
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// We lanch in different tasks the work to be done. To finish
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// this fuction, we need to wait for the completion of every
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// tasks. To do that, we give to each tasks a wait_chan that we
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// drop at the end of the work. At the end of this function, we
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// wait until the channel hang up.
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let (wait_port, wait_chan) = Chan::new();
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let len = out.read(|out| out.len());
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let chunk = len / 100 + 1;
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for chk in count(0, chunk) {
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if chk >= len {break;}
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let w = wait.clone();
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let w = wait_chan.clone();
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let v = v.clone();
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let out = out.clone();
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spawn(proc() {
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@ -46,10 +49,13 @@ fn mult(v: RWArc<~[f64]>, out: RWArc<~[f64]>, f: fn(&~[f64], uint) -> f64) {
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let val = v.read(|v| f(v, i));
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out.write(|out| out[i] = val);
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}
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let _ = w;
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drop(w)
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});
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}
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let _ = wait.unwrap();
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// wait until the channel hang up (every task finished)
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drop(wait_chan);
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for () in wait_port.iter() {}
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}
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fn mult_Av_impl(v: &~[f64], i: uint) -> f64 {
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@ -97,7 +103,8 @@ fn main() {
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mult_AtAv(u.clone(), v.clone(), tmp.clone());
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mult_AtAv(v.clone(), u.clone(), tmp.clone());
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}
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let u = u.unwrap();
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let v = v.unwrap();
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println!("{:.9f}", (dot(u,v) / dot(v,v)).sqrt());
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u.read(|u| v.read(|v| {
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println!("{:.9f}", (dot(*u, *v) / dot(*v, *v)).sqrt());
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}))
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}
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