102 lines
2.1 KiB
C
102 lines
2.1 KiB
C
/* pause.c
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Pause for half a second. */
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#include "uucp.h"
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#include "sysdep.h"
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#include "system.h"
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/* Pick a timing routine to use. I somewhat arbitrarily picked usleep
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above napms above poll above select above nap. The nap function is
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last because on different systems the argument has different
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meanings. */
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#if HAVE_USLEEP || HAVE_NAPMS || HAVE_POLL || HAVE_SELECT
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#undef HAVE_NAP
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#define HAVE_NAP 0
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#endif
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#if HAVE_USLEEP || HAVE_NAPMS || HAVE_POLL
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#undef HAVE_SELECT
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#define HAVE_SELECT 0
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#endif
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#if HAVE_USLEEP || HAVE_NAPMS
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#undef HAVE_POLL
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#define HAVE_POLL 0
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#endif
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#if HAVE_USLEEP
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#undef HAVE_NAPMS
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#define HAVE_NAPMS 0
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#endif
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#if HAVE_SELECT
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#if HAVE_SYS_TIME_H
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#include <sys/time.h>
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#endif
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#if HAVE_SYS_SELECT_H
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#include <sys/select.h>
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#endif
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#endif
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#if HAVE_POLL
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#if HAVE_STROPTS_H
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#include <stropts.h>
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#endif
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#if HAVE_POLL_H
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#include <poll.h>
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#endif
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#if ! HAVE_STROPTS_H && ! HAVE_POLL_H
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/* We need a definition for struct pollfd, although it doesn't matter
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what it contains. */
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struct pollfd
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{
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int idummy;
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};
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#endif /* ! HAVE_STROPTS_H && ! HAVE_POLL_H */
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#endif /* HAVE_POLL */
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#if HAVE_TIME_H
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#if ! HAVE_SYS_TIME_H || ! HAVE_SELECT || TIME_WITH_SYS_TIME
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#include <time.h>
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#endif
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#endif
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void
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usysdep_pause ()
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{
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#if HAVE_NAPMS
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napms (500);
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#endif /* HAVE_NAPMS */
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#if HAVE_NAP
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#if HAVE_HUNDREDTHS_NAP
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nap (50L);
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#else
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nap (500L);
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#endif /* ! HAVE_HUNDREDTHS_NAP */
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#endif /* HAVE_NAP */
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#if HAVE_USLEEP
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usleep (500 * (long) 1000);
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#endif /* HAVE_USLEEP */
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#if HAVE_POLL
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struct pollfd sdummy;
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/* We need to pass an unused pollfd structure because poll checks
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the address before checking the number of elements. */
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memset (&sdummy, 0, sizeof sdummy);
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poll (&sdummy, 0, 500);
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#endif /* HAVE_POLL */
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#if HAVE_SELECT
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struct timeval s;
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s.tv_sec = 0;
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s.tv_usec = 500 * (long) 1000;
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select (0, (pointer) NULL, (pointer) NULL, (pointer) NULL, &s);
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#endif /* HAVE_SELECT */
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#if ! HAVE_NAPMS && ! HAVE_NAP && ! HAVE_USLEEP
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#if ! HAVE_SELECT && ! HAVE_POLL
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sleep (1);
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#endif /* ! HAVE_SELECT && ! HAVE_POLL */
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#endif /* ! HAVE_NAPMS && ! HAVE_NAP && ! HAVE_USLEEP */
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}
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