gdb: add target_ops::supports_displaced_step

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

diff --git a/gprof/hertz.c b/gprof/hertz.c
index 1c2927f673ef2dfa9b2ebb3c9c892f4ac350d78e..dc052d566369e678c8beafeb53835666f99de90e 100644 (file)
--- a/gprof/hertz.c
+++ b/gprof/hertz.c
@@ -1,45 +1,63 @@
 /*
- * Copyright (c) 1983 Regents of the University of California.
- * All rights reserved.
+ * Copyright (c) 1983, 1993
+ *      The Regents of the University of California.  All rights reserved.
  *
- * Redistribution and use in source and binary forms are permitted
- * provided that: (1) source distributions retain this entire copyright
- * notice and comment, and (2) distributions including binaries display
- * the following acknowledgement:  ``This product includes software
- * developed by the University of California, Berkeley and its contributors''
- * in the documentation or other materials provided with the distribution
- * and in all advertising materials mentioning features or use of this
- * software. Neither the name of the University nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
- * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
  */
+#include "gprof.h"
+#include "hertz.h"
 
-#ifndef lint
-static char sccsid[] = "@(#)hertz.c    5.4 (Berkeley) 6/1/90";
-#endif /* not lint */
-
-#include <sys/time.h>
-
-    /*
-     * discover the tick frequency of the machine
-     * if something goes wrong, we return 0, an impossible hertz.
-     */
-#define        HZ_WRONG        0
 
-hertz()
+int
+hertz (void)
 {
-       struct itimerval tim;
+#ifdef HERTZ
+  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);
-       return (1000000 / tim.it_interval.tv_usec);
+  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) */
 }