libf2c/libU77/alarm_.c

   1 /* Copyright (C) 1997 Free Software Foundation, Inc.
   2 This file is part of GNU Fortran libU77 library.
   3
   4 This library is free software; you can redistribute it and/or modify it
   5 under the terms of the GNU Library General Public License as published
   6 by the Free Software Foundation; either version 2 of the License, or
   7 (at your option) any later version.
   8
   9 GNU Fortran 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 GNU Fortran; see the file COPYING.LIB.  If
  16 not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17 Boston, MA 02111-1307, USA.  */
  18
  19 #ifdef HAVE_CONFIG_H
  20 #include "config.h"
  21 #endif
  22
  23 #if HAVE_UNISTD_H
  24 #  include <unistd.h>
  25 #endif
  26
  27 #include <errno.h>              /* for ENOSYS */
  28 #include "f2c.h"
  29
  30 #ifndef RETSIGTYPE
  31 /* we shouldn't rely on this... */
  32 #ifdef KR_headers
  33 #define RETSIGTYPE int
  34 #else
  35 #define RETSIGTYPE void
  36 #endif
  37 #endif
  38 typedef RETSIGTYPE (*sig_type)();
  39
  40 #ifdef KR_headers
  41 extern sig_type signal();
  42
  43 integer G77_alarm_0 (seconds, proc)
  44      integer *seconds;
  45      sig_type proc;
  46 #else
  47 #include <signal.h>
  48 typedef int (*sig_proc)(int);
  49
  50 integer G77_alarm_0 (integer *seconds, sig_proc proc)
  51 #endif
  52 {
  53   int status;
  54 #if defined (HAVE_ALARM) && defined (SIGALRM)
  55   if (signal(SIGALRM, (sig_type)proc) == SIG_ERR)
  56     status = -1;
  57   else
  58     status = alarm (*seconds);
  59 #else /* ! HAVE_ALARM || ! SIGALRM */
  60   errno = ENOSYS;
  61   status = -1;
  62 #endif
  63   return status;
  64 }