include/sys/signal.h

   1 /*
   2  *  This file is part of the SPL: Solaris Porting Layer.
   3  *
   4  *  Copyright (c) 2008 Lawrence Livermore National Security, LLC.
   5  *  Produced at Lawrence Livermore National Laboratory
   6  *  Written by:
   7  *          Brian Behlendorf <behlendorf1@llnl.gov>,
   8  *          Herb Wartens <wartens2@llnl.gov>,
   9  *          Jim Garlick <garlick@llnl.gov>
  10  *  UCRL-CODE-235197
  11  *
  12  *  This is free software; you can redistribute it and/or modify it
  13  *  under the terms of the GNU General Public License as published by
  14  *  the Free Software Foundation; either version 2 of the License, or
  15  *  (at your option) any later version.
  16  *
  17  *  This is distributed in the hope that it will be useful, but WITHOUT
  18  *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  19  *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  20  *  for more details.
  21  *
  22  *  You should have received a copy of the GNU General Public License along
  23  *  with this program; if not, write to the Free Software Foundation, Inc.,
  24  *  51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA.
  25  */
  26
  27 #ifndef _SPL_SIGNAL_H
  28 #define _SPL_SIGNAL_H
  29
  30 #define FORREAL         0       /* Usual side-effects */
  31 #define JUSTLOOKING     1       /* Don't stop the process */
  32
  33 /* The "why" argument indicates the allowable side-effects of the call:
  34  *
  35  * FORREAL:  Extract the next pending signal from p_sig into p_cursig;
  36  * stop the process if a stop has been requested or if a traced signal
  37  * is pending.
  38  *
  39  * JUSTLOOKING:  Don't stop the process, just indicate whether or not
  40  * a signal might be pending (FORREAL is needed to tell for sure).
  41  */
  42 static __inline__ int
  43 issig(int why)
  44 {
  45         ASSERT(why == FORREAL || why == JUSTLOOKING);
  46
  47         return signal_pending(current);
  48 }
  49
  50 #endif /* SPL_SIGNAL_H */