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1 | /* Copyright (C) 1995,1996 Free Software Foundation, Inc. |
2 | * | |
3 | * This program is free software; you can redistribute it and/or modify | |
4 | * it under the terms of the GNU General Public License as published by | |
5 | * the Free Software Foundation; either version 2, or (at your option) | |
6 | * any later version. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | * GNU General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this software; see the file COPYING. If not, write to | |
15 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
16 | * | |
17 | * As a special exception, the Free Software Foundation gives permission | |
18 | * for additional uses of the text contained in its release of GUILE. | |
19 | * | |
20 | * The exception is that, if you link the GUILE library with other files | |
21 | * to produce an executable, this does not by itself cause the | |
22 | * resulting executable to be covered by the GNU General Public License. | |
23 | * Your use of that executable is in no way restricted on account of | |
24 | * linking the GUILE library code into it. | |
25 | * | |
26 | * This exception does not however invalidate any other reasons why | |
27 | * the executable file might be covered by the GNU General Public License. | |
28 | * | |
29 | * This exception applies only to the code released by the | |
30 | * Free Software Foundation under the name GUILE. If you copy | |
31 | * code from other Free Software Foundation releases into a copy of | |
32 | * GUILE, as the General Public License permits, the exception does | |
33 | * not apply to the code that you add in this way. To avoid misleading | |
34 | * anyone as to the status of such modified files, you must delete | |
35 | * this exception notice from them. | |
36 | * | |
37 | * If you write modifications of your own for GUILE, it is your choice | |
38 | * whether to permit this exception to apply to your modifications. | |
39 | * If you do not wish that, delete this exception notice. | |
40 | */ | |
41 | \f | |
42 | ||
43 | #include <stdio.h> | |
44 | #include "_scm.h" | |
20e6290e | 45 | #include "stackchk.h" |
0f2d19dd | 46 | |
20e6290e | 47 | #include "root.h" |
0f2d19dd JB |
48 | \f |
49 | ||
50 | SCM scm_sys_protects[SCM_NUM_PROTECTS]; | |
51 | struct scm_root_state the_scm_root; | |
52 | struct scm_root_state * scm_root = &the_scm_root; | |
53 | ||
54 | \f | |
55 | ||
56 | ||
57 | ||
58 | \f | |
59 | ||
60 | /* Call thunk(closure) underneath a top-level error handler. | |
61 | * If an error occurs, pass the exitval through err_filter and return it. | |
62 | * If no error occurs, return the value of thunk. | |
63 | */ | |
64 | ||
65 | ||
66 | #ifdef _UNICOS | |
67 | typedef int setjmp_type; | |
68 | #else | |
69 | typedef long setjmp_type; | |
70 | #endif | |
71 | ||
72 | ||
73 | #ifdef __STDC__ | |
74 | SCM | |
75 | scm_call_catching_errors (SCM (*thunk)(), SCM (*err_filter)(), void * closure) | |
76 | #else | |
77 | SCM | |
78 | scm_call_catching_errors (thunk, err_filter, closure) | |
79 | SCM (*thunk)(); | |
80 | SCM (*err_filter)(); | |
81 | void * closure; | |
82 | #endif | |
83 | { | |
84 | SCM answer; | |
85 | setjmp_type i; | |
faa6b3df MD |
86 | #ifdef DEBUG_EXTENSIONS |
87 | SCM_DFRAME (scm_rootcont) = last_debug_info_frame; | |
88 | #endif | |
0f2d19dd | 89 | i = setjmp (SCM_JMPBUF (scm_rootcont)); |
faa6b3df MD |
90 | #ifdef STACK_CHECKING |
91 | scm_stack_checking_enabled_p = SCM_STACK_CHECKING_P; | |
92 | #endif | |
0f2d19dd JB |
93 | if (!i) |
94 | { | |
95 | scm_gc_heap_lock = 0; | |
96 | answer = thunk (closure); | |
97 | } | |
98 | else | |
99 | { | |
100 | scm_gc_heap_lock = 1; | |
101 | answer = err_filter (scm_exitval, closure); | |
102 | } | |
103 | return answer; | |
104 | } | |
105 | ||
106 | ||
107 | \f | |
108 | ||
109 |