Eli Zaretskii's DOSish file name patches.

[deliverable/binutils-gdb.git] / gprof / hertz.c

diff --git a/gprof/hertz.c b/gprof/hertz.c
index 979ad3748fb5df3802dde32a29aa94acd6f1238e..a7fc14ed7f8cc8d8b3e5691eea4b4555ee9fd24b 100644 (file)
--- a/gprof/hertz.c
+++ b/gprof/hertz.c
@@ -16,31 +16,37 @@
  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  */
-#include <sys/time.h>
 #include "hertz.h"
 
 
-#ifdef __MSDOS__
-# define HERTZ 18
-#endif
-
 int
-hertz()
+hertz ()
 {
 #ifdef HERTZ
-    return HERTZ;
-#else
-    struct itimerval tim;
+  return HERTZ;
+#else /* ! defined (HERTZ) */
+#ifdef HAVE_SETITIMER
+  struct itimerval tim;
 
-    tim.it_interval.tv_sec = 0;
-    tim.it_interval.tv_usec = 1;
-    tim.it_value.tv_sec = 0;
-    tim.it_value.tv_usec = 0;
-    setitimer(ITIMER_REAL, &tim, 0);
-    setitimer(ITIMER_REAL, 0, &tim);
-    if (tim.it_interval.tv_usec < 2) {
-       return HZ_WRONG;
-    } /* if */
-    return 1000000 / tim.it_interval.tv_usec;
-#endif
-} /* hertz */
+  tim.it_interval.tv_sec = 0;
+  tim.it_interval.tv_usec = 1;
+  tim.it_value.tv_sec = 0;
+  tim.it_value.tv_usec = 0;
+  setitimer (ITIMER_REAL, &tim, 0);
+  setitimer (ITIMER_REAL, 0, &tim);
+  if (tim.it_interval.tv_usec >= 2)
+    {
+      return 1000000 / tim.it_interval.tv_usec;
+    }
+#endif /* ! defined (HAVE_SETITIMER) */
+#if defined (HAVE_SYSCONF) && defined (_SC_CLK_TCK)
+  return sysconf (_SC_CLK_TCK);
+#else /* ! defined (HAVE_SYSCONF) || ! defined (_SC_CLK_TCK) */
+#ifdef __MSDOS__
+  return 18;
+#else  /* ! defined (__MSDOS__) */
+  return HZ_WRONG;
+#endif /* ! defined (__MSDOS__) */
+#endif /* ! defined (HAVE_SYSCONF) || ! defined (_SC_CLK_TCK) */
+#endif /* ! defined (HERTZ) */
+}