From 03fab4a3451bdcad8a5927178ce5071919d58f6d Mon Sep 17 00:00:00 2001
From: Gabriele Gristina <gabriele.gristina@gmail.com>
Date: Thu, 11 Jan 2018 02:41:16 +0100
Subject: [PATCH] Fix clock_gettime() on OSX (v2)

---
 include/timer.h |  7 -------
 include/types.h |  2 ++
 src/timer.c     | 20 +++++---------------
 3 files changed, 7 insertions(+), 22 deletions(-)

diff --git a/include/timer.h b/include/timer.h
index 63a23db30..e46a40feb 100644
--- a/include/timer.h
+++ b/include/timer.h
@@ -6,13 +6,6 @@
 #ifndef _TIMER_H
 #define _TIMER_H
 
-#if defined(__APPLE__) && defined(MISSING_CLOCK_GETTIME)
-#include <sys/time.h>
-#include <mach/clock.h>
-#include <mach/mach.h>
-#include <mach/mach_time.h>
-#endif
-
 void   hc_timer_set (hc_timer_t *a);
 double hc_timer_get (hc_timer_t a);
 
diff --git a/include/types.h b/include/types.h
index 1cc61ef43..d6fbd14ef 100644
--- a/include/types.h
+++ b/include/types.h
@@ -47,6 +47,8 @@ typedef uint64_t u64;
 
 #if defined (_WIN)
 typedef LARGE_INTEGER     hc_timer_t;
+#elif defined(__APPLE__) && defined(MISSING_CLOCK_GETTIME)
+typedef struct timeval    hc_timer_t;
 #else
 typedef struct timespec   hc_timer_t;
 #endif
diff --git a/src/timer.c b/src/timer.c
index 4cda1f092..415514456 100644
--- a/src/timer.c
+++ b/src/timer.c
@@ -34,21 +34,7 @@ inline double hc_timer_get (hc_timer_t a)
 inline void hc_timer_set (hc_timer_t* a)
 {
   #if defined(__APPLE__) && defined(MISSING_CLOCK_GETTIME)
-  // taken from proxmark3/client/util_posix
-  static uint64_t clock_start_time = 0;
-  static mach_timebase_info_data_t timebase_info = {0, 0};
-  uint64_t now = mach_absolute_time();
-
-  if (clock_start_time == 0)
-  {
-    mach_timebase_info(&timebase_info);
-    clock_start_time = now;
-  }
-
-  now = (uint64_t)((double)(now - clock_start_time) * (double)timebase_info.numer / (double)timebase_info.denom);
-
-  a->tv_sec = now / 1000000000;
-  a->tv_nsec = now % 1000000000;
+  gettimeofday (a, NULL);
   #else
   clock_gettime (CLOCK_MONOTONIC, a);
   #endif
@@ -60,6 +46,9 @@ inline double hc_timer_get (hc_timer_t a)
 
   hc_timer_set (&hr_tmp);
 
+  #if defined(__APPLE__) && defined(MISSING_CLOCK_GETTIME)
+  return (double) (((hr_tmp.tv_sec - (a).tv_sec) * 1000) + ((double) (hr_tmp.tv_usec - (a).tv_usec) / 1000));
+  #else
   hc_timer_t s;
 
   s.tv_sec  = hr_tmp.tv_sec  - a.tv_sec;
@@ -74,6 +63,7 @@ inline double hc_timer_get (hc_timer_t a)
   double r = ((double) s.tv_sec * 1000) + ((double) s.tv_nsec / 1000000);
 
   return r;
+  #endif
 }
 
 #endif