| 1 | /* classes: h_files */ |
| 2 | |
| 3 | #ifndef STACKCHKH |
| 4 | #define STACKCHKH |
| 5 | /* Copyright (C) 1995,1996 Free Software Foundation, Inc. |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 2, or (at your option) |
| 10 | * any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with this software; see the file COPYING. If not, write to |
| 19 | * the Free Software Foundation, Inc., 59 Temple Place, Suite 330, |
| 20 | * Boston, MA 02111-1307 USA |
| 21 | * |
| 22 | * As a special exception, the Free Software Foundation gives permission |
| 23 | * for additional uses of the text contained in its release of GUILE. |
| 24 | * |
| 25 | * The exception is that, if you link the GUILE library with other files |
| 26 | * to produce an executable, this does not by itself cause the |
| 27 | * resulting executable to be covered by the GNU General Public License. |
| 28 | * Your use of that executable is in no way restricted on account of |
| 29 | * linking the GUILE library code into it. |
| 30 | * |
| 31 | * This exception does not however invalidate any other reasons why |
| 32 | * the executable file might be covered by the GNU General Public License. |
| 33 | * |
| 34 | * This exception applies only to the code released by the |
| 35 | * Free Software Foundation under the name GUILE. If you copy |
| 36 | * code from other Free Software Foundation releases into a copy of |
| 37 | * GUILE, as the General Public License permits, the exception does |
| 38 | * not apply to the code that you add in this way. To avoid misleading |
| 39 | * anyone as to the status of such modified files, you must delete |
| 40 | * this exception notice from them. |
| 41 | * |
| 42 | * If you write modifications of your own for GUILE, it is your choice |
| 43 | * whether to permit this exception to apply to your modifications. |
| 44 | * If you do not wish that, delete this exception notice. */ |
| 45 | \f |
| 46 | #include "libguile/__scm.h" |
| 47 | |
| 48 | #include "libguile/continuations.h" |
| 49 | #ifdef DEBUG_EXTENSIONS |
| 50 | #include "libguile/debug.h" |
| 51 | #endif |
| 52 | \f |
| 53 | |
| 54 | /* With debug extensions we have the possibility to use the debug options |
| 55 | * to disable stack checking. |
| 56 | */ |
| 57 | #ifdef DEBUG_EXTENSIONS |
| 58 | #define SCM_STACK_CHECKING_P SCM_STACK_LIMIT |
| 59 | #else |
| 60 | /* *fixme* This option should be settable also without debug extensions. */ |
| 61 | #define SCM_STACK_LIMIT 100000 |
| 62 | #define SCM_STACK_CHECKING_P 1 |
| 63 | #endif |
| 64 | |
| 65 | #ifdef STACK_CHECKING |
| 66 | # ifdef SCM_STACK_GROWS_UP |
| 67 | # define SCM_STACK_OVERFLOW_P(s)\ |
| 68 | (s - SCM_BASE (scm_rootcont) > SCM_STACK_LIMIT * sizeof (SCM_STACKITEM)) |
| 69 | # else |
| 70 | # define SCM_STACK_OVERFLOW_P(s)\ |
| 71 | (SCM_BASE (scm_rootcont) - s > SCM_STACK_LIMIT * sizeof (SCM_STACKITEM)) |
| 72 | # endif |
| 73 | # define SCM_CHECK_STACK\ |
| 74 | {\ |
| 75 | SCM_STACKITEM stack;\ |
| 76 | if (SCM_STACK_OVERFLOW_P (&stack) && scm_stack_checking_enabled_p)\ |
| 77 | scm_report_stack_overflow ();\ |
| 78 | } |
| 79 | #else |
| 80 | # define SCM_CHECK_STACK /**/ |
| 81 | #endif /* STACK_CHECKING */ |
| 82 | |
| 83 | extern int scm_stack_checking_enabled_p; |
| 84 | |
| 85 | \f |
| 86 | |
| 87 | extern void scm_report_stack_overflow SCM_P ((void)); |
| 88 | extern long scm_stack_size SCM_P ((SCM_STACKITEM *start)); |
| 89 | extern void scm_stack_report SCM_P ((void)); |
| 90 | extern void scm_init_stackchk SCM_P ((void)); |
| 91 | |
| 92 | #endif /* STACKCHKH */ |