include/sys/signal.h

   1 /*
   2  *  Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC.
   3  *  Copyright (C) 2007 The Regents of the University of California.
   4  *  Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
   5  *  Written by Brian Behlendorf <behlendorf1@llnl.gov>.
   6  *  UCRL-CODE-235197
   7  *
   8  *  This file is part of the SPL, Solaris Porting Layer.
   9  *  For details, see <http://zfsonlinux.org/>.
  10  *
  11  *  The SPL is free software; you can redistribute it and/or modify it
  12  *  under the terms of the GNU General Public License as published by the
  13  *  Free Software Foundation; either version 2 of the License, or (at your
  14  *  option) any later version.
  15  *
  16  *  The SPL is distributed in the hope that it will be useful, but WITHOUT
  17  *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  18  *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  19  *  for more details.
  20  *
  21  *  You should have received a copy of the GNU General Public License along
  22  *  with the SPL.  If not, see <http://www.gnu.org/licenses/>.
  23  */
  24
  25 #ifndef _SPL_SIGNAL_H
  26 #define _SPL_SIGNAL_H
  27
  28 #include <linux/sched.h>
  29
  30 #ifdef HAVE_SCHED_SIGNAL_HEADER
  31 #include <linux/sched/signal.h>
  32 #endif
  33
  34 #define FORREAL         0       /* Usual side-effects */
  35 #define JUSTLOOKING     1       /* Don't stop the process */
  36
  37 /*
  38  * The "why" argument indicates the allowable side-effects of the call:
  39  *
  40  * FORREAL:  Extract the next pending signal from p_sig into p_cursig;
  41  * stop the process if a stop has been requested or if a traced signal
  42  * is pending.
  43  *
  44  * JUSTLOOKING:  Don't stop the process, just indicate whether or not
  45  * a signal might be pending (FORREAL is needed to tell for sure).
  46  */
  47 static __inline__ int
  48 issig(int why)
  49 {
  50         ASSERT(why == FORREAL || why == JUSTLOOKING);
  51
  52         return (signal_pending(current));
  53 }
  54
  55 #endif /* SPL_SIGNAL_H */