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libsst-os/SST_Time_MacOSX.c

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+/*
+	SST_Time_MacOSX.c
+	Author: Patrick Baggett <ptbaggett@762studios.com>
+	Created: 5/30/2013
+
+	Purpose: 
+
+	libsst-os timing functions for MacOSX systems
+
+	License:
+
+	This program is free software. It comes without any warranty, to
+	the extent permitted by applicable law. You can redistribute it
+	and/or modify it under the terms of the Do What The Fuck You Want
+	To Public License, Version 2, as published by Sam Hocevar. See
+	http://sam.zoy.org/wtfpl/COPYING for more details.
+
+*/
+
+#include <SST/SST_Time.h>
+#include <mach/mach_time.h>
+
+/******************************************************************************/
+
+static mach_timebase_info_data_t info;
+
+/******************************************************************************/
+
+int __libsst_init_time()
+{
+	return (mach_timebase_info(&info) == KERN_SUCCESS);
+}
+
+/******************************************************************************/
+
+static uint64_t absToNsec(uint64_t abstime)
+{
+	return abstime * info.numer  / info.denom;
+}
+
+/******************************************************************************/
+
+uint64_t SST_OS_GetMicroTime()
+{	
+	return absToNsec(mach_absolute_time()) / 1000;
+}
+
+/******************************************************************************/
+
+uint64_t SST_OS_GetMilliTime()
+{
+	return absToNsec(mach_absolute_time()) / 1000000;
+}
+
+/******************************************************************************/
+
+double SST_OS_GetFloatingTime()
+{
+	return absToNsec(mach_absolute_time()) / 1000000000.0;
+}