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ntp_workimpl.h revision 1.2.8.2 
      1 /*	$NetBSD: ntp_workimpl.h,v 1.2.8.2 2015/01/07 04:45:24 msaitoh Exp $	*/
      2 
      3 /*
      4  * ntp_workimpl.h - selects worker child implementation
      5  */
      6 #ifndef NTP_WORKIMPL_H
      7 #define NTP_WORKIMPL_H
      8 
      9 /*
     10  * Some systems do not support fork() and don't have an alternate
     11  * threads implementation of ntp_intres.  Such systems are limited
     12  * to using numeric IP addresses.
     13  */
     14 #if defined(SYS_WINNT)
     15 # define WORK_THREAD
     16 #elif defined(ISC_PLATFORM_USETHREADS) && \
     17       defined(HAVE_SEM_TIMEDWAIT) && \
     18       (defined(HAVE_GETCLOCK) || defined(HAVE_CLOCK_GETTIME))
     19 # define WORK_THREAD
     20 # define WORK_PIPE
     21 #elif defined(VMS) || defined(SYS_VXWORKS)
     22   /* empty */
     23 #elif defined(HAVE_WORKING_FORK)
     24 # define WORK_FORK
     25 # define WORK_PIPE
     26 #endif
     27 
     28 #if defined(WORK_FORK) || defined(WORK_THREAD)
     29 # define WORKER
     30 #endif
     31 
     32 #endif	/* !NTP_WORKIMPL_H */
     33