hurd/hurd-raise.c

   1 /* Copyright (C) 1994, 1995, 1996, 1997 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Library General Public License as
   6    published by the Free Software Foundation; either version 2 of the
   7    License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Library General Public License for more details.
  13
  14    You should have received a copy of the GNU Library General Public
  15    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  16    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17    Boston, MA 02111-1307, USA.  */
  18
  19 #include <hurd.h>
  20 #include <hurd/signal.h>
  21 #include <hurd/msg.h>
  22 #include <setjmp.h>
  23
  24 /* Handle signal SIGNO in the calling thread.
  25    If SS is not NULL it is the sigstate for the calling thread;
  26    SS->lock is held on entry and released before return.  */
  27
  28 void
  29 _hurd_raise_signal (struct hurd_sigstate *ss,
  30                     int signo, const struct hurd_signal_detail *detail)
  31 {
  32   if (ss == NULL)
  33     {
  34       ss = _hurd_self_sigstate ();
  35       __spin_lock (&ss->lock);
  36     }
  37
  38   /* Mark SIGNO as pending to be delivered.  */
  39   __sigaddset (&ss->pending, signo);
  40   ss->pending_data[signo] = *detail;
  41
  42   __spin_unlock (&ss->lock);
  43
  44   /* Send a message to the signal thread so it
  45      will wake up and check for pending signals.  */
  46   __msg_sig_post (_hurd_msgport, signo, detail->code, __mach_task_self ());
  47 }