/* Return time used so far, in microseconds.
- Copyright (C) 1994 Free Software Foundation, Inc.
+ Copyright (C) 1994, 1999, 2002 Free Software Foundation, Inc.
This file is part of the libiberty library.
Libiberty is free software; you can redistribute it and/or
#include "ansidecl.h"
#include "libiberty.h"
+/* On some systems (such as WindISS), you must include <sys/types.h>
+ to get the definition of "time_t" before you include <time.h>. */
+#include <sys/types.h>
+
/* There are several ways to get elapsed execution time; unfortunately no
single way is available for all host systems, nor are there reliable
ways to find out which way is correct for a given host. */
-#include <time.h>
+#ifdef TIME_WITH_SYS_TIME
+# include <sys/time.h>
+# include <time.h>
+#else
+# if HAVE_SYS_TIME_H
+# include <sys/time.h>
+# else
+# ifdef HAVE_TIME_H
+# include <time.h>
+# endif
+# endif
+#endif
-#ifdef HAVE_GETRUSAGE
-#include <sys/time.h>
+#if defined (HAVE_GETRUSAGE) && defined (HAVE_SYS_RESOURCE_H)
#include <sys/resource.h>
#endif
#include <sys/times.h>
#endif
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
/* This is a fallback; if wrong, it will likely make obviously wrong
results. */
#define CLOCKS_PER_SEC 1
#endif
+#ifdef _SC_CLK_TCK
+#define GNU_HZ sysconf(_SC_CLK_TCK)
+#else
+#ifdef HZ
+#define GNU_HZ HZ
+#else
+#ifdef CLOCKS_PER_SEC
+#define GNU_HZ CLOCKS_PER_SEC
+#endif
+#endif
+#endif
+
+/*
+
+@deftypefn Replacement long get_run_time (void)
+
+Returns the time used so far, in microseconds. If possible, this is
+the time used by this process, else it is the elapsed time since the
+process started.
+
+@end deftypefn
+
+*/
+
long
get_run_time ()
{
-#ifdef HAVE_GETRUSAGE
+#if defined (HAVE_GETRUSAGE) && defined (HAVE_SYS_RESOURCE_H)
struct rusage rusage;
getrusage (0, &rusage);
struct tms tms;
times (&tms);
- return (tms.tms_utime + tms.tms_stime) * (1000000 / HZ);
+ return (tms.tms_utime + tms.tms_stime) * (1000000 / GNU_HZ);
#else /* ! HAVE_TIMES */
/* Fall back on clock and hope it's correctly implemented. */
const long clocks_per_sec = CLOCKS_PER_SEC;