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glibc  2.9
sigstack.h
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00001 /* sigstack, sigaltstack definitions.
00002    Copyright (C) 1998, 2000, 2002, 2003 Free Software Foundation, Inc.
00003    This file is part of the GNU C Library.
00004 
00005    The GNU C Library is free software; you can redistribute it and/or
00006    modify it under the terms of the GNU Lesser General Public
00007    License as published by the Free Software Foundation; either
00008    version 2.1 of the License, or (at your option) any later version.
00009 
00010    The GNU C Library is distributed in the hope that it will be useful,
00011    but WITHOUT ANY WARRANTY; without even the implied warranty of
00012    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013    Lesser General Public License for more details.
00014 
00015    You should have received a copy of the GNU Lesser General Public
00016    License along with the GNU C Library; if not, write to the Free
00017    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00018    02111-1307 USA.  */
00019 
00020 #ifndef _SIGNAL_H
00021 # error "Never include this file directly.  Use <signal.h> instead"
00022 #endif
00023 
00024 #ifndef _SIGSTACK_H
00025 #define _SIGSTACK_H  1
00026 
00027 /* Structure describing a signal stack (obsolete).  */
00028 struct sigstack
00029   {
00030     __ptr_t ss_sp;          /* Signal stack pointer.  */
00031     int ss_onstack;         /* Nonzero if executing on this stack.  */
00032   };
00033 
00034 
00035 /* Possible values for `ss_flags.'.  */
00036 enum
00037 {
00038   SS_ONSTACK = 1,
00039 #define SS_ONSTACK   SS_ONSTACK
00040   SS_DISABLE
00041 #define SS_DISABLE   SS_DISABLE
00042 };
00043 
00044 /* Minimum stack size for a signal handler.
00045 
00046    Yes, this should be 131072 but the constant got defined incorrectly
00047    in the kernel and we have to live with it.  Users should in any case
00048    use SIGSTKSZ as the size user-supplied buffers should have.  */
00049 #define MINSIGSTKSZ  131027
00050 
00051 /* System default stack size.  */
00052 #define SIGSTKSZ     262144
00053 
00054 
00055 /* Alternate, preferred interface.  */
00056 typedef struct sigaltstack
00057   {
00058     __ptr_t ss_sp;
00059     int ss_flags;
00060     size_t ss_size;
00061   } stack_t;
00062 
00063 #endif /* bits/sigstack.h */