skalibs

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iopause_ppoll.c (912B)

      1 /* ISC license. */
      2 
      3 #include <skalibs/sysdeps.h>
      4 
      5 #ifdef SKALIBS_HASPPOLL
      6 
      7 #include <skalibs/nonposix.h>
      8 #include <errno.h>
      9 #include <time.h>
     10 #include <poll.h>
     11 #include <skalibs/tai.h>
     12 #include <skalibs/iopause.h>
     13 
     14 int iopause_ppoll (iopause_fd *x, unsigned int len, tain const *deadline, tain const *stamp)
     15 {
     16   struct timespec ts = { .tv_sec = 0, .tv_nsec = 0 } ;
     17   if (deadline && tain_less(stamp, deadline))
     18   {
     19     tain delta ;
     20     tain_sub(&delta, deadline, stamp) ;
     21     if (!timespec_from_tain_relative(&ts, &delta))
     22     {
     23       if (errno != EOVERFLOW) return -1 ;
     24       else deadline = 0 ;
     25     }
     26   }
     27   return ppoll(x, len, deadline ? &ts : 0, 0) ;
     28 }
     29 
     30 #else
     31 
     32 #include <errno.h>
     33 #include <skalibs/iopause.h>
     34 
     35 int iopause_ppoll (iopause_fd *x, unsigned int len, tain const *deadline, tain const *stamp)
     36 {
     37   (void)x ;
     38   (void)len ;
     39   (void)deadline ;
     40   (void)stamp ;
     41   return (errno = ENOSYS, -1) ;
     42 }
     43 
     44 #endif