From df420fdf5c2608db2113a375f81e9415676b5685 Mon Sep 17 00:00:00 2001
From: Josh Holtrop <jholtrop@gmail.com>
Date: Wed, 24 May 2017 16:02:18 -0400
Subject: [PATCH] use ThreadsWait (only for blocking thread waits)

---
 lib/rscons/environment.rb | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/lib/rscons/environment.rb b/lib/rscons/environment.rb
index 0246592..cc8cbd2 100644
--- a/lib/rscons/environment.rb
+++ b/lib/rscons/environment.rb
@@ -1,6 +1,7 @@
 require "fileutils"
 require "set"
 require "shellwords"
+require "thwait"
 
 module Rscons
   # The Environment class is the main programmatic interface to Rscons. It
@@ -861,11 +862,7 @@ module Rscons
         if threads.empty?
           raise "No threads to wait for"
         end
-        loop do
-          thread = find_finished_thread(threads, true)
-          return thread if thread
-          sleep 0.1
-        end
+        ThreadsWait.new(*threads).next_wait
       end
     end