1 files changed, 48 insertions, 0 deletions
diff --git a/osdep/timer-darwin.c b/osdep/timer-darwin.c
new file mode 100644
index 0000000..bb8a9b4
--- /dev/null
+++ b/osdep/timer-darwin.c
@@ -0,0 +1,48 @@
+/*
+ * Precise timer routines using Mach timing
+ *
+ * Copyright (c) 2003-2004, Dan Villiom Podlaski Christiansen
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use, copy,
+ * modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ */
+
+#include <unistd.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <time.h>
+#include <math.h>
+#include <sys/time.h>
+#include <mach/mach_time.h>
+
+#include "common/msg.h"
+#include "timer.h"
+
+static double timebase_ratio_ns;
+
+void mp_sleep_ns(int64_t ns)
+{
+    uint64_t deadline = ns / timebase_ratio_ns + mach_absolute_time();
+    mach_wait_until(deadline);
+}
+
+uint64_t mp_raw_time_ns(void)
+{
+    return mach_absolute_time() * timebase_ratio_ns;
+}
+
+void mp_raw_time_init(void)
+{
+    struct mach_timebase_info timebase;
+
+    mach_timebase_info(&timebase);
+    timebase_ratio_ns = (double)timebase.numer / (double)timebase.denom;
+}