From a7cedbe2204b410414e2f17f00c698d2be2f66ed Mon Sep 17 00:00:00 2001
From: Ben Noordhuis <info@bnoordhuis.nl>
Date: Wed, 7 Nov 2012 16:10:55 +0100
Subject: [PATCH] darwin: fix uv_hrtime() thread safety issue

---
 src/unix/darwin.c | 15 ++++-----------
 1 file changed, 4 insertions(+), 11 deletions(-)

diff --git a/src/unix/darwin.c b/src/unix/darwin.c
index cc7c817c..9de27db9 100644
--- a/src/unix/darwin.c
+++ b/src/unix/darwin.c
@@ -174,19 +174,12 @@ void uv__cf_loop_signal(uv_loop_t* loop, cf_loop_signal_cb cb, void* arg) {
 
 
 uint64_t uv_hrtime(void) {
-    uint64_t time;
-    uint64_t enano;
-    static mach_timebase_info_data_t sTimebaseInfo;
+    mach_timebase_info_data_t info;
 
-    time = mach_absolute_time();
+    if (mach_timebase_info(&info) != KERN_SUCCESS)
+      abort();
 
-    if (0 == sTimebaseInfo.denom) {
-        (void)mach_timebase_info(&sTimebaseInfo);
-    }
-
-    enano = time * sTimebaseInfo.numer / sTimebaseInfo.denom;
-
-    return enano;
+    return mach_absolute_time() * info.numer / info.denom;
 }