6 /* Copyright (C) 1996,1998 Free Software Foundation, Inc.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2, or (at your option)
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this software; see the file COPYING. If not, write to
20 * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
21 * Boston, MA 02111-1307 USA
23 * As a special exception, the Free Software Foundation gives permission
24 * for additional uses of the text contained in its release of GUILE.
26 * The exception is that, if you link the GUILE library with other files
27 * to produce an executable, this does not by itself cause the
28 * resulting executable to be covered by the GNU General Public License.
29 * Your use of that executable is in no way restricted on account of
30 * linking the GUILE library code into it.
32 * This exception does not however invalidate any other reasons why
33 * the executable file might be covered by the GNU General Public License.
35 * This exception applies only to the code released by the
36 * Free Software Foundation under the name GUILE. If you copy
37 * code from other Free Software Foundation releases into a copy of
38 * GUILE, as the General Public License permits, the exception does
39 * not apply to the code that you add in this way. To avoid misleading
40 * anyone as to the status of such modified files, you must delete
41 * this exception notice from them.
43 * If you write modifications of your own for GUILE, it is your choice
44 * whether to permit this exception to apply to your modifications.
45 * If you do not wish that, delete this exception notice. */
47 /* Software engineering face-lift by Greg J. Badros, 11-Dec-1999,
48 gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */
53 #include "libguile/__scm.h"
54 #include "libguile/debug.h"
55 #include "libguile/throw.h"
59 #define scm_flo0 scm_sys_protects[0]
60 #define scm_listofnull scm_sys_protects[1]
61 #define scm_undefineds scm_sys_protects[2]
62 #define scm_nullvect scm_sys_protects[3]
63 #define scm_nullstr scm_sys_protects[4]
64 #define scm_symhash scm_sys_protects[5]
65 #define scm_weak_symhash scm_sys_protects[6]
66 #define scm_symhash_vars scm_sys_protects[7]
67 #define scm_keyword_obarray scm_sys_protects[8]
68 #define scm_type_obj_list scm_sys_protects[9]
69 #define scm_first_type scm_sys_protects[10]
70 #define scm_stand_in_procs scm_sys_protects[11]
71 #define scm_object_whash scm_sys_protects[12]
72 #define scm_permobjs scm_sys_protects[13]
73 #define scm_asyncs scm_sys_protects[14]
74 #define scm_protects scm_sys_protects[15]
75 #ifdef DEBUG_EXTENSIONS
76 #define scm_source_whash scm_sys_protects[16]
77 #define SCM_NUM_PROTECTS 17
79 #define SCM_NUM_PROTECTS 16
82 extern SCM scm_sys_protects
[];
86 extern long scm_tc16_root
;
88 #define SCM_ROOTP(obj) (SCM_NIMP(obj) && (scm_tc16_root == SCM_TYP16 (obj)))
89 #define SCM_ROOT_STATE(root) ((scm_root_state *) SCM_CDR (root))
91 typedef struct scm_root_state
93 SCM_STACKITEM
* stack_base
;
94 jmp_buf save_regs_gc_mark
;
99 SCM continuation_stack
;
100 SCM continuation_stack_ptr
;
101 #ifdef DEBUG_EXTENSIONS
102 /* It is very inefficient to have this variable in the root state. */
103 scm_debug_frame
*last_debug_frame
;
106 SCM progargs
; /* vestigial */
107 SCM exitval
; /* vestigial */
119 SCM system_transformer
;
120 SCM top_level_lookup_closure_var
;
122 SCM handle
; /* The root object for this root state */
123 SCM parent
; /* The parent root object */
126 #define scm_stack_base (scm_root->stack_base)
127 #define scm_save_regs_gc_mark (scm_root->save_regs_gc_mark)
128 #define scm_errjmp_bad (scm_root->errjmp_bad)
130 #define scm_rootcont (scm_root->rootcont)
131 #define scm_dynwinds (scm_root->dynwinds)
132 #define scm_continuation_stack (scm_root->continuation_stack)
133 #define scm_continuation_stack_ptr (scm_root->continuation_stack_ptr)
134 #define scm_progargs (scm_root->progargs)
136 #define scm_last_debug_frame (scm_root->last_debug_frame)
138 #define scm_exitval (scm_root->exitval)
139 #define scm_cur_inp (scm_root->cur_inp)
140 #define scm_cur_outp (scm_root->cur_outp)
141 #define scm_cur_errp (scm_root->cur_errp)
142 #define scm_def_inp (scm_root->def_inp)
143 #define scm_def_outp (scm_root->def_outp)
144 #define scm_def_errp (scm_root->def_errp)
145 #define scm_cur_loadp (scm_root->cur_loadp)
146 #define scm_top_level_lookup_closure_var \
147 (scm_root->top_level_lookup_closure_var)
148 #define scm_system_transformer (scm_root->system_transformer)
151 #define scm_root ((scm_root_state *) SCM_THREAD_LOCAL_DATA)
152 #define scm_set_root(new_root) SCM_SET_THREAD_LOCAL_DATA (new_root)
153 #else /* USE_THREADS */
154 extern struct scm_root_state
*scm_root
;
155 #define scm_set_root(new_root) (scm_root = (new_root))
156 #endif /* USE_THREADS */
160 extern SCM
scm_make_root (SCM parent
);
161 extern SCM
scm_internal_cwdr (scm_catch_body_t body
,
163 scm_catch_handler_t handler
,
165 SCM_STACKITEM
*stack_start
);
166 extern SCM
scm_call_with_dynamic_root (SCM thunk
, SCM handler
);
167 extern SCM
scm_dynamic_root (void);
168 extern SCM
scm_apply_with_dynamic_root (SCM proc
, SCM a1
, SCM args
, SCM handler
);
169 extern SCM
scm_call_catching_errors (SCM (*thunk
)(), SCM (*err_filter
)(), void * closure
);
170 extern void scm_init_root (void);