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libsst-os/SST_Time_POSIX.c

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+/*
+	SST_Time_POSIX.c
+	Author: Patrick Baggett <ptbaggett@762studios.com>
+	Created: 5/29/2013
+
+	Purpose: 
+
+	libsst-os timing functions for POSIX 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.
+
+*/
+
+/*
+	Sadly, MacOS X does not implement clock_gettime(), so it has its own file
+*/
+
+#include <SST/SST_Time.h>
+#include <time.h>
+
+struct timespec freq;
+
+static clockid_t timeSource =
+#if defined(CLOCK_MONOTONIC_RAW)	/* Linux >= 2.6.28 */
+	CLOCK_MONOTONIC_RAW;
+#else
+	CLOCK_MONOTONIC;
+#endif
+
+int __libsst_init_time()
+{
+	struct timespec v;
+	int clkOk = (clock_gettime(timeSource, &v) > 0);
+
+	if(!clkOk)
+	{
+		#if defined(CLOCK_MONOTONIC_RAW)
+		timeSource = CLOCK_MONOTONIC;
+		clkOk = (clock_gettime(timeSource, &v) > 0);
+		if(!clkOk)
+		#else
+		timeSource = CLOCK_REALTIME;
+		#endif
+
+
+		if(clock_gettime(timeSource, &v) < 0)
+			return 0;
+	}
+	return 1;
+}
+
+uint64_t SST_OS_GetMicroTime()
+{
+	struct timespec v;
+
+	clock_gettime(timeSource, &v);
+
+	return (uint64_t)((v.tv_sec * 1000000) + (v.tv_nsec / 1000));
+}
+
+uint64_t SST_OS_GetMilliTime()	/* Not be confused with Miller Time (TM) :D */
+{
+	struct timespec v;
+
+	clock_gettime(timeSource, &v);
+
+	return (uint64_t)((v.tv_sec * 1000) + (v.tv_nsec / 1000000));
+}
+
+double SST_OS_GetFloatingTime()
+{
+	struct timespec v;
+
+	clock_gettime(timeSource, &v);
+
+	return (double)v.tv_sec + (v.tv_nsec / 1000000000.0);
+}
+
+