From a93ca14418ee91864bb9a3f8888b5e9a823f94f3 Mon Sep 17 00:00:00 2001
From: Andreas Rumpf <rumpf_a@web.de>
Date: Sat, 7 Jan 2017 10:39:20 +0100
Subject: [PATCH] disable pinToCpu for OSX

---
 lib/system/threads.nim | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/lib/system/threads.nim b/lib/system/threads.nim
index 6f5bb38b14..e32b772588 100644
--- a/lib/system/threads.nim
+++ b/lib/system/threads.nim
@@ -463,10 +463,11 @@ else:
     ## pins a thread to a `CPU`:idx:. In other words sets a
     ## thread's `affinity`:idx:. If you don't know what this means, you
     ## shouldn't use this proc.
-    var s {.noinit.}: CpuSet
-    cpusetZero(s)
-    cpusetIncl(cpu.cint, s)
-    setAffinity(t.sys, sizeof(s), s)
+    when not defined(macosx):
+      var s {.noinit.}: CpuSet
+      cpusetZero(s)
+      cpusetIncl(cpu.cint, s)
+      setAffinity(t.sys, sizeof(s), s)
 
 proc createThread*(t: var Thread[void], tp: proc () {.thread, nimcall.}) =
   createThread[void](t, tp)