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+/* $Id: timing.c,v 1.9 2011/01/25 16:30:48 ellson Exp $ $Revision: 1.9 $ */

+/* vim:set shiftwidth=4 ts=8: */

+

+/*************************************************************************

+ * Copyright (c) 2011 AT&T Intellectual Property 

+ * All rights reserved. This program and the accompanying materials

+ * are made available under the terms of the Eclipse Public License v1.0

+ * which accompanies this distribution, and is available at

+ * http://www.eclipse.org/legal/epl-v10.html

+ *

+ * Contributors: See CVS logs. Details at http://www.graphviz.org/

+ *************************************************************************/

+

+#ifndef WIN32

+

+#include        <unistd.h>

+#include	<sys/types.h>

+#include	<sys/times.h>

+#include	<sys/param.h>

+

+

+

+#ifndef HZ

+#define HZ 60

+#endif

+typedef struct tms mytime_t;

+#define GET_TIME(S) times(&(S))

+#define DIFF_IN_SECS(S,T) ((S.tms_utime + S.tms_stime - T.tms_utime - T.tms_stime)/(double)HZ)

+

+#else

+

+#include	<time.h>

+#include "render.h"

+#include    "utils.h"

+

+typedef clock_t mytime_t;

+#define GET_TIME(S) S = clock()

+#define DIFF_IN_SECS(S,T) ((S - T) / (double)CLOCKS_PER_SEC)

+

+#endif

+

+

+static mytime_t T;

+

+void start_timer(void)

+{

+    GET_TIME(T);

+}

+

+double elapsed_sec(void)

+{

+    mytime_t S;

+    double rv;

+

+    GET_TIME(S);

+    rv = DIFF_IN_SECS(S, T);

+    return rv;

+}