2 * Copyright (c) 1983 Regents of the University of California.
5 * Redistribution and use in source and binary forms are permitted
6 * provided that: (1) source distributions retain this entire copyright
7 * notice and comment, and (2) distributions including binaries display
8 * the following acknowledgement: ``This product includes software
9 * developed by the University of California, Berkeley and its contributors''
10 * in the documentation or other materials provided with the distribution
11 * and in all advertising materials mentioning features or use of this
12 * software. Neither the name of the University nor the names of its
13 * contributors may be used to endorse or promote products derived
14 * from this software without specific prior written permission.
15 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
31 #else /* ! defined (HERTZ) */
35 tim
.it_interval
.tv_sec
= 0;
36 tim
.it_interval
.tv_usec
= 1;
37 tim
.it_value
.tv_sec
= 0;
38 tim
.it_value
.tv_usec
= 0;
39 setitimer (ITIMER_REAL
, &tim
, 0);
40 setitimer (ITIMER_REAL
, 0, &tim
);
41 if (tim
.it_interval
.tv_usec
< 2)
45 return 1000000 / tim
.it_interval
.tv_usec
;
46 #else /* ! defined (HAVE_SETITIMER) */
47 #if defined (HAVE_SYSCONF) && defined (_SC_CLK_TCK)
48 return sysconf (_SC_CLK_TCK
);
49 #else /* ! defined (HAVE_SYSCONF) || ! defined (_SC_CLK_TCK) */
51 #endif /* ! defined (HAVE_SYSCONF) || ! defined (_SC_CLK_TCK) */
52 #endif /* ! defined (HAVE_SETITIMER) */
53 #endif /* ! defined (HERTZ) */
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