1: /* sigstack, sigaltstack definitions.
    2:    Copyright (C) 1998, 1999 Free Software Foundation, Inc.
    3:    This file is part of the GNU C Library.
    4: 
    5:    The GNU C Library is free software; you can redistribute it and/or
    6:    modify it under the terms of the GNU Lesser General Public
    7:    License as published by the Free Software Foundation; either
    8:    version 2.1 of the License, or (at your option) any later version.
    9: 
   10:    The GNU C Library is distributed in the hope that it will be useful,
   11:    but WITHOUT ANY WARRANTY; without even the implied warranty of
   12:    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   13:    Lesser General Public License for more details.
   14: 
   15:    You should have received a copy of the GNU Lesser General Public
   16:    License along with the GNU C Library; if not, write to the Free
   17:    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   18:    02111-1307 USA.  */
   19: 
   20: #ifndef _SIGNAL_H
   21: # error "Never include this file directly.  Use <signal.h> instead"
   22: #endif
   23: 
   24: 
   25: /* Structure describing a signal stack (obsolete).  */
   26: struct sigstack
   27:   {
   28:     __ptr_t ss_sp;              /* Signal stack pointer.  */
   29:     int ss_onstack;             /* Nonzero if executing on this stack.  */
   30:   };
   31: 
   32: 
   33: /* Alternate, preferred interface.  */
   34: typedef struct sigaltstack
   35:   {
   36:     __ptr_t ss_sp;
   37:     size_t ss_size;
   38:     int ss_flags;
   39:   } stack_t;
   40: 
   41: 
   42: /* Possible values for `ss_flags.'.  */
   43: enum
   44: {
   45:   SS_ONSTACK = 0x0001,
   46: #define SS_ONSTACK      SS_ONSTACK
   47:   SS_DISABLE = 0x0004
   48: #define SS_DISABLE      SS_DISABLE
   49: };
   50: 
   51: /* Minumum stack size for a signal handler.  */
   52: #define MINSIGSTKSZ     8192
   53: 
   54: /* System default stack size.  */
   55: #define SIGSTKSZ        (MINSIGSTKSZ + 32768)