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0f2d19dd JB |
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" | |
45 | ||
46 | \f | |
47 | ||
48 | SCM scm_sys_protects[SCM_NUM_PROTECTS]; | |
49 | struct scm_root_state the_scm_root; | |
50 | struct scm_root_state * scm_root = &the_scm_root; | |
51 | ||
52 | \f | |
53 | ||
54 | ||
55 | ||
56 | \f | |
57 | ||
58 | /* Call thunk(closure) underneath a top-level error handler. | |
59 | * If an error occurs, pass the exitval through err_filter and return it. | |
60 | * If no error occurs, return the value of thunk. | |
61 | */ | |
62 | ||
63 | ||
64 | #ifdef _UNICOS | |
65 | typedef int setjmp_type; | |
66 | #else | |
67 | typedef long setjmp_type; | |
68 | #endif | |
69 | ||
70 | ||
71 | #ifdef __STDC__ | |
72 | SCM | |
73 | scm_call_catching_errors (SCM (*thunk)(), SCM (*err_filter)(), void * closure) | |
74 | #else | |
75 | SCM | |
76 | scm_call_catching_errors (thunk, err_filter, closure) | |
77 | SCM (*thunk)(); | |
78 | SCM (*err_filter)(); | |
79 | void * closure; | |
80 | #endif | |
81 | { | |
82 | SCM answer; | |
83 | setjmp_type i; | |
84 | i = setjmp (SCM_JMPBUF (scm_rootcont)); | |
85 | if (!i) | |
86 | { | |
87 | scm_gc_heap_lock = 0; | |
88 | answer = thunk (closure); | |
89 | } | |
90 | else | |
91 | { | |
92 | scm_gc_heap_lock = 1; | |
93 | answer = err_filter (scm_exitval, closure); | |
94 | } | |
95 | return answer; | |
96 | } | |
97 | ||
98 | ||
99 | \f | |
100 | ||
101 |