From 4675f860849c5d064d1279b2eff324a271024254 Mon Sep 17 00:00:00 2001
From: Brian Anderson <banderson@mozilla.com>
Date: Sun, 26 Feb 2012 22:08:41 -0800
Subject: [PATCH] rustdoc: Do less copying in util::parmap

---
 src/rustdoc/util.rs | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/src/rustdoc/util.rs b/src/rustdoc/util.rs
index b864cad99835..dbc143bcc872 100644
--- a/src/rustdoc/util.rs
+++ b/src/rustdoc/util.rs
@@ -1,13 +1,17 @@
 export parmap;
 
-fn parmap<T:send, U:send>(v: [T], f: fn~(T) -> U) -> [U] {
+fn parmap<T:send, U:send>(v: [T], f: fn~(T) -> U) -> [U] unsafe {
     let futures = vec::map(v) {|elt|
-        future::spawn {||
-            f(elt)
+        let po = comm::port();
+        let ch = comm::chan(po);
+        let addr = ptr::addr_of(elt);
+        task::spawn {||
+            comm::send(ch, f(*addr));
         }
+        po
     };
     vec::map(futures) {|future|
-        future::get(future)
+        comm::recv(future)
     }
 }