1 files changed, 20 insertions, 0 deletions

diff --git a/mach.c b/mach.c
new file mode 100644
index 0000000..35ac3a9
--- /dev/null
+++ b/mach.c
@@ -0,0 +1,20 @@
+#include "mach.h"
+
+/* there is no clock_gettime on MacOS platform */
+int clock_gettime(int clk_id, struct timespec *t)
+{
+    mach_timebase_info_data_t timebase;
+    mach_timebase_info(&timebase);
+    
+    uint64_t time;
+    
+    time = mach_absolute_time();
+    
+    double nseconds = ((double)time * (double)timebase.numer) / ((double)timebase.denom);
+    double seconds = ((double)time * (double)timebase.numer) / ((double)timebase.denom * 1e9);
+    
+    t->tv_sec = seconds;
+    t->tv_nsec = nseconds;
+    
+    return 0;
+}