First commit - moving from LuaForge to SourceForge

1 files changed, 164 insertions, 0 deletions

diff --git a/src/fftw/timer.c b/src/fftw/timer.c
new file mode 100644
index 0000000..a7d05a4
--- /dev/null
+++ b/src/fftw/timer.c
@@ -0,0 +1,164 @@
+
+/*
+ * Copyright (c) 1997-1999, 2003 Massachusetts Institute of Technology
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ */
+
+/*
+ * timer.c -- this file measures the execution time of 
+ *            ffts.  This information is used by the planner.
+ */
+
+/* $Id: timer.c,v 1.1 2008/10/17 06:13:18 scuri Exp $ */
+
+#include <time.h>
+#include "fftw-int.h"
+#include <math.h>
+#include <stdlib.h>
+
+/********************* System-specific Timing Support *********************/
+
+#if defined(HAVE_MAC_TIMER) && !defined(HAVE_MAC_PCI_TIMER)
+
+/* Use Macintosh Time Manager to get the time: */
+
+/*
+ * make sure compiler (CW) recognizes the pascal keywords that are in
+ * Timer.h
+ */
+#pragma only_std_keywords off	
+
+#include <Timer.h>
+
+#pragma only_std_keywords reset
+
+fftw_time get_Mac_microseconds(void)
+{
+     fftw_time t;
+     UnsignedWide microsec;	/* 
+				 * microsec.lo and microsec.hi are
+				 * unsigned long's, and are the two parts
+				 * of a 64 bit unsigned integer 
+				 */
+
+     Microseconds(&microsec);	/* get time in microseconds */
+
+     /* store lo and hi words into our structure: */
+     t.lo = microsec.lo;
+     t.hi = microsec.hi;
+
+     return t;
+}
+
+fftw_time fftw_time_diff(fftw_time t1, fftw_time t2)
+/*
+ * This function takes the difference t1 - t2 of two 64 bit
+ * integers, represented by the 32 bit lo and hi words.
+ * if t1 < t2, returns 0. 
+ */
+{
+     fftw_time diff;
+
+     if (t1.hi < t2.hi) {	/* something is wrong...t1 < t2! */
+	  diff.hi = diff.lo = 0;
+	  return diff;
+     } else
+	  diff.hi = t1.hi - t2.hi;
+
+     if (t1.lo < t2.lo) {
+	  if (diff.hi > 0)
+	       diff.hi -= 1;	/* carry */
+	  else {		/* something is wrong...t1 < t2! */
+	       diff.hi = diff.lo = 0;
+	       return diff;
+	  }
+     }
+     diff.lo = t1.lo - t2.lo;
+
+     return diff;
+}
+
+#endif
+
+#ifdef HAVE_WIN32_TIMER
+#include <windows.h>
+
+static LARGE_INTEGER gFreq;
+static int gHaveHiResTimer = 0;
+static int gFirstTime = 1;
+
+unsigned long GetPerfTime(void)
+{
+     LARGE_INTEGER lCounter;
+
+     if (gFirstTime) {
+	  gFirstTime = 0;
+
+	  if (QueryPerformanceFrequency(&gFreq)) {
+	       gHaveHiResTimer = 1;
+	  }
+     }
+     if (gHaveHiResTimer) {
+	  QueryPerformanceCounter(&lCounter);
+	  return lCounter.u.LowPart;
+     } else {
+	  return (unsigned long) clock();
+     }
+}
+
+double GetPerfSec(double pTime)
+{
+     if (gHaveHiResTimer) {
+	  return pTime / gFreq.u.LowPart;	// assumes HighPart==0
+
+     } else {
+	  return pTime / CLOCKS_PER_SEC;
+     }
+}
+
+#endif				/* HAVE_WIN32_TIMER */
+
+#if defined(FFTW_USE_GETTIMEOFDAY)
+
+/* timer support routines for systems having gettimeofday */
+
+#if defined(HAVE_BSDGETTIMEOFDAY) && ! defined(HAVE_GETTIMEOFDAY)
+#define gettimeofday BSDgettimeofday
+#endif
+
+fftw_time fftw_gettimeofday_get_time(void)
+{
+     struct timeval tv;
+     gettimeofday(&tv, 0);
+     return tv;
+}
+
+fftw_time fftw_gettimeofday_time_diff(fftw_time t1, fftw_time t2)
+{
+     fftw_time diff;
+
+     diff.tv_sec = t1.tv_sec - t2.tv_sec;
+     diff.tv_usec = t1.tv_usec - t2.tv_usec;
+     /* normalize */
+     while (diff.tv_usec < 0) {
+	  diff.tv_usec += 1000000L;
+	  diff.tv_sec -= 1;
+     }
+
+     return diff;
+}
+#endif