pith/osdep/forkwait.h

   1 /*
   2  * $Id: forkwait.h 761 2007-10-23 22:35:18Z hubert@u.washington.edu $
   3  *
   4  * ========================================================================
   5  * Copyright 2013-2022 Eduardo Chappa
   6  * Copyright 2006 University of Washington
   7  *
   8  * Licensed under the Apache License, Version 2.0 (the "License");
   9  * you may not use this file except in compliance with the License.
  10  * You may obtain a copy of the License at
  11  *
  12  *     http://www.apache.org/licenses/LICENSE-2.0
  13  *
  14  * ========================================================================
  15  */
  16
  17 #ifndef PITH_OSDEP_FORKWAIT_INCLUDED
  18 #define PITH_OSDEP_FORKWAIT_INCLUDED
  19
  20
  21 #if     HAVE_UNION_WAIT
  22 #define WAITSTATUS_T    union wait
  23 #else
  24 #define WAITSTATUS_T    int
  25 #endif
  26
  27 #ifndef WEXITSTATUS
  28 #define WEXITSTATUS(X)  (((X) >> 8) & 0xff)     /* high bits tell exit value */
  29 #endif
  30 #ifndef WIFEXITED
  31 #define WIFEXITED(X)    (!((X) & 0xff))         /* low bits tell how it died */
  32 #endif
  33
  34 #if     !HAVE_WORKING_VFORK
  35 #define vfork fork
  36 #endif
  37
  38
  39 #endif /* PITH_OSDEP_FORKWAIT_INCLUDED */
  40