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Annotation of coherent/g/usr/lib/uucp/tay104/unix/pause.c, revision 1.1

1.1     ! root        1: /* pause.c
        !             2:    Pause for half a second.  */
        !             3: 
        !             4: #include "uucp.h"
        !             5: 
        !             6: #include "sysdep.h"
        !             7: #include "system.h"
        !             8: 
        !             9: /* Pick a timing routine to use.  I somewhat arbitrarily picked usleep
        !            10:    above nap above napms above poll above select.  */
        !            11: #if HAVE_USLEEP || HAVE_NAP || HAVE_NAPMS || HAVE_POLL
        !            12: #undef HAVE_SELECT
        !            13: #define HAVE_SELECT 0
        !            14: #endif
        !            15: 
        !            16: #if HAVE_USLEEP || HAVE_NAP || HAVE_NAPMS
        !            17: #undef HAVE_POLL
        !            18: #define HAVE_POLL 0
        !            19: #endif
        !            20: 
        !            21: #if HAVE_USLEEP || HAVE_NAP
        !            22: #undef HAVE_NAPMS
        !            23: #define HAVE_NAPMS 0
        !            24: #endif
        !            25: 
        !            26: #if HAVE_USLEEP
        !            27: #undef HAVE_NAP
        !            28: #define HAVE_NAP 0
        !            29: #endif
        !            30: 
        !            31: #if HAVE_SELECT
        !            32: #include <sys/time.h>
        !            33: #if HAVE_SYS_SELECT_H
        !            34: #include <sys/select.h>
        !            35: #endif
        !            36: #endif
        !            37: 
        !            38: #if HAVE_POLL
        !            39: #if HAVE_STROPTS_H
        !            40: #include <stropts.h>
        !            41: #endif
        !            42: #if HAVE_POLL_H
        !            43: #include <poll.h>
        !            44: #endif
        !            45: #if ! HAVE_STROPTS_H && ! HAVE_POLL_H
        !            46: /* We need a definition for struct pollfd, although it doesn't matter
        !            47:    what it contains.  */
        !            48: struct pollfd
        !            49: {
        !            50:   int idummy;
        !            51: };
        !            52: #endif /* ! HAVE_STROPTS_H && ! HAVE_POLL_H */
        !            53: #endif /* HAVE_POLL */
        !            54: 
        !            55: #if HAVE_TIME_H
        !            56: #if HAVE_SYS_TIME_AND_TIME_H || ! USE_SELECT_TIMER
        !            57: #include <time.h>
        !            58: #endif
        !            59: #endif
        !            60: 
        !            61: void
        !            62: usysdep_pause ()
        !            63: {
        !            64: #if HAVE_NAPMS
        !            65:   napms (500);
        !            66: #endif /* HAVE_NAPMS */
        !            67: #if HAVE_NAP
        !            68: #if HAVE_HUNDREDTHS_NAP
        !            69:   nap (50L);
        !            70: #else
        !            71:   nap (500L);
        !            72: #endif /* ! HAVE_HUNDREDTHS_NAP */
        !            73: #endif /* HAVE_NAP */
        !            74: #if HAVE_USLEEP
        !            75:   usleep (500 * (long) 1000);
        !            76: #endif /* HAVE_USLEEP */
        !            77: #if HAVE_POLL
        !            78:   struct pollfd sdummy;
        !            79: 
        !            80:   /* We need to pass an unused pollfd structure because poll checks
        !            81:      the address before checking the number of elements.  */
        !            82:   poll (&sdummy, 0, 500);
        !            83: #endif /* HAVE_POLL */
        !            84: #if HAVE_SELECT
        !            85:   struct timeval s;
        !            86: 
        !            87:   s.tv_sec = 0;
        !            88:   s.tv_usec = 500 * (long) 1000;
        !            89:   select (0, (pointer) NULL, (pointer) NULL, (pointer) NULL, &s);
        !            90: #endif /* USE_SELECT_TIMER */
        !            91: #if ! HAVE_NAPMS && ! HAVE_NAP && ! HAVE_USLEEP
        !            92: #if ! USE_SELECT_TIMER && ! HAVE_POLL
        !            93:   sleep (1);
        !            94: #endif /* ! USE_SELECT_TIMER && ! HAVE_POLL */
        !            95: #endif /* ! HAVE_NAPMS && ! HAVE_NAP && ! HAVE_USLEEP */
        !            96: }

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