1 /* Copyright (C) 1995,1996,1997,1998,1999 Free Software Foundation, Inc.
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)
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.
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, Inc., 59 Temple Place, Suite 330,
16 * Boston, MA 02111-1307 USA
18 * As a special exception, the Free Software Foundation gives permission
19 * for additional uses of the text contained in its release of GUILE.
21 * The exception is that, if you link the GUILE library with other files
22 * to produce an executable, this does not by itself cause the
23 * resulting executable to be covered by the GNU General Public License.
24 * Your use of that executable is in no way restricted on account of
25 * linking the GUILE library code into it.
27 * This exception does not however invalidate any other reasons why
28 * the executable file might be covered by the GNU General Public License.
30 * This exception applies only to the code released by the
31 * Free Software Foundation under the name GUILE. If you copy
32 * code from other Free Software Foundation releases into a copy of
33 * GUILE, as the General Public License permits, the exception does
34 * not apply to the code that you add in this way. To avoid misleading
35 * anyone as to the status of such modified files, you must delete
36 * this exception notice from them.
38 * If you write modifications of your own for GUILE, it is your choice
39 * whether to permit this exception to apply to your modifications.
40 * If you do not wish that, delete this exception notice. */
42 /* Include the headers for just about everything.
43 We call all their initialization functions. */
48 /* Everybody has an init function. */
52 #include "backtrace.h"
55 #include "continuations.h"
56 #ifdef DEBUG_EXTENSIONS
94 #include "regex-posix.h"
109 #include "stackchk.h"
114 #include "strorder.h"
115 #include "strports.h"
121 #include "variable.h"
126 #include "guardians.h"
137 /* Setting up the stack. */
139 static void start_stack
SCM_P ((void *base
));
140 static void restart_stack
SCM_P ((void * base
));
148 root
= scm_permanent_object (scm_make_root (SCM_UNDEFINED
));
149 scm_set_root (SCM_ROOT_STATE (root
));
150 scm_stack_base
= base
;
152 scm_exitval
= SCM_BOOL_F
; /* vestigial */
154 scm_top_level_lookup_closure_var
= SCM_BOOL_F
;
155 scm_system_transformer
= SCM_BOOL_F
;
157 scm_root
->fluids
= scm_make_initial_fluids ();
159 /* Create an object to hold the root continuation.
161 SCM_NEWCELL (scm_rootcont
);
162 SCM_SETJMPBUF (scm_rootcont
, scm_must_malloc ((long) sizeof (scm_contregs
),
164 SCM_SETCAR (scm_rootcont
, scm_tc7_contin
);
165 SCM_SEQ (scm_rootcont
) = 0;
166 /* The root continuation if further initialized by restart_stack. */
168 /* Create the look-aside stack for variables that are shared between
169 * captured continuations.
171 scm_continuation_stack
= scm_make_vector (SCM_MAKINUM (512), SCM_UNDEFINED
);
172 /* The continuation stack is further initialized by restart_stack. */
174 /* The remainder of stack initialization is factored out to another
175 * function so that if this stack is ever exitted, it can be
176 * re-entered using restart_stack. */
177 restart_stack (base
);
185 scm_dynwinds
= SCM_EOL
;
186 SCM_DYNENV (scm_rootcont
) = SCM_EOL
;
187 SCM_THROW_VALUE (scm_rootcont
) = SCM_EOL
;
188 #ifdef DEBUG_EXTENSIONS
189 SCM_DFRAME (scm_rootcont
) = scm_last_debug_frame
= 0;
191 SCM_BASE (scm_rootcont
) = base
;
192 scm_continuation_stack_ptr
= SCM_MAKINUM (0);
196 static char remsg
[] = "remove\n#define ", addmsg
[] = "add\n#define ";
199 static void fixconfig
SCM_P ((char *s1
, char *s2
, int s
));
202 fixconfig (s1
, s2
, s
)
209 fputs ("\nin ", stderr
);
210 fputs (s
? "setjump" : "scmfig", stderr
);
211 fputs (".h and recompile scm\n", stderr
);
216 static void check_config
SCM_P ((void));
224 if (HEAP_SEG_SIZE
!= j
)
225 fixconfig ("reduce", "size of HEAP_SEG_SIZE", 0);
228 if (sizeof (float) != sizeof (long))
229 fixconfig (remsg
, "SCM_SINGLES", 0);
230 #endif /* def SCM_SINGLES */
234 if (2 * SCM_BITSPERDIG
/ SCM_CHAR_BIT
> sizeof (long))
235 fixconfig (remsg
, "SCM_BIGDIG", 0);
236 #ifndef SCM_DIGSTOOBIG
237 if (SCM_DIGSPERLONG
* sizeof (SCM_BIGDIG
) > sizeof (long))
238 fixconfig (addmsg
, "SCM_DIGSTOOBIG", 0);
242 #ifdef SCM_STACK_GROWS_UP
243 if (((SCM_STACKITEM
*) & j
- stack_start_ptr
) < 0)
244 fixconfig (remsg
, "SCM_STACK_GROWS_UP", 1);
246 if ((stack_start_ptr
- (SCM_STACKITEM
*) & j
) < 0)
247 fixconfig (addmsg
, "SCM_STACK_GROWS_UP", 1);
254 /* initializing standard and current I/O ports */
256 /* Like scm_fdes_to_port, except that:
257 - NAME is a standard C string, not a Guile string
258 - we set the revealed count for FILE's file descriptor to 1, so
259 that fdes won't be closed when the port object is GC'd. */
261 scm_standard_stream_to_port (int fdes
, char *mode
, char *name
)
263 SCM port
= scm_fdes_to_port (fdes
, mode
, scm_makfrom0str (name
));
264 scm_set_port_revealed_x (port
, SCM_MAKINUM (1));
268 /* Create standard ports from stdin, stdout, and stderr. */
270 scm_init_standard_ports ()
272 /* From the SCSH manual:
274 It can be useful to turn I/O buffering off in some cases, for
275 example when an I/O stream is to be shared by multiple
276 subprocesses. For this reason, scsh allocates an unbuffered port
277 for file descriptor 0 at start-up time.
279 Because shells frequently share stdin with subprocesses, if the
280 shell does buffered reads, it might ``steal'' input intended for
281 a subprocess. For this reason, all shells, including sh, csh,
282 and scsh, read stdin unbuffered. Applications that can tolerate
283 buffered input on stdin can reset \ex{(current-input-port)} to
284 block buffering for higher performance. */
287 = scm_standard_stream_to_port (0,
288 isatty (0) ? "r0" : "r",
290 scm_def_outp
= scm_standard_stream_to_port (1,
291 isatty (1) ? "wl" : "w",
293 scm_def_errp
= scm_standard_stream_to_port (2,
294 isatty (2) ? "w0" : "w",
297 scm_cur_inp
= scm_def_inp
;
298 scm_cur_outp
= scm_def_outp
;
299 scm_cur_errp
= scm_def_errp
;
300 scm_cur_loadp
= SCM_BOOL_F
;
305 /* Loading the startup Scheme files. */
307 /* The boot code "ice-9/boot-9" is only loaded by scm_boot_guile when
308 this is false. The unexec code uses this, to keep ice_9 from being
309 loaded into dumped guile executables. */
310 int scm_ice_9_already_loaded
= 0;
313 scm_load_startup_files ()
315 /* We want a path only containing directories from GUILE_LOAD_PATH,
316 SCM_SITE_DIR and SCM_LIBRARY_DIR when searching for the site init
317 file, so we do this before loading Ice-9. */
318 SCM init_path
= scm_sys_search_load_path (scm_makfrom0str ("init.scm"));
321 if (!scm_ice_9_already_loaded
)
323 scm_primitive_load_path (scm_makfrom0str ("ice-9/boot-9.scm"));
325 /* Load the init.scm file. */
326 if (SCM_NFALSEP (init_path
))
327 scm_primitive_load (init_path
);
329 scm_post_boot_init_modules ();
335 /* The main init code. */
338 typedef int setjmp_type
;
340 typedef long setjmp_type
;
343 /* All the data needed to invoke the main function. */
344 struct main_func_closure
346 /* the function to call */
347 void (*main_func
) SCM_P ((void *closure
, int argc
, char **argv
));
348 void *closure
; /* dummy data to pass it */
350 char **argv
; /* the argument list it should receive */
354 static void scm_boot_guile_1
SCM_P ((SCM_STACKITEM
*base
,
355 struct main_func_closure
*closure
));
356 static SCM invoke_main_func
SCM_P ((void *body_data
));
359 /* Fire up the Guile Scheme interpreter.
361 Call MAIN_FUNC, passing it CLOSURE, ARGC, and ARGV. MAIN_FUNC
362 should do all the work of the program (initializing other packages,
363 reading user input, etc.) before returning. When MAIN_FUNC
364 returns, call exit (0); this function never returns. If you want
365 some other exit value, MAIN_FUNC may call exit itself.
367 scm_boot_guile arranges for program-arguments to return the strings
368 given by ARGC and ARGV. If MAIN_FUNC modifies ARGC/ARGV, should
369 call scm_set_program_arguments with the final list, so Scheme code
370 will know which arguments have been processed.
372 scm_boot_guile establishes a catch-all catch handler which prints
373 an error message and exits the process. This means that Guile
374 exits in a coherent way when system errors occur and the user isn't
375 prepared to handle it. If the user doesn't like this behavior,
376 they can establish their own universal catcher to shadow this one.
378 Why must the caller do all the real work from MAIN_FUNC? The
379 garbage collector assumes that all local variables of type SCM will
380 be above scm_boot_guile's stack frame on the stack. If you try to
381 manipulate SCM values after this function returns, it's the luck of
382 the draw whether the GC will be able to find the objects you
383 allocate. So, scm_boot_guile function exits, rather than
384 returning, to discourage people from making that mistake. */
388 scm_boot_guile (argc
, argv
, main_func
, closure
)
391 void (*main_func
) ();
394 /* The garbage collector uses the address of this variable as one
395 end of the stack, and the address of one of its own local
396 variables as the other end. */
398 struct main_func_closure c
;
400 c
.main_func
= main_func
;
405 scm_boot_guile_1 (&dummy
, &c
);
409 /* Record here whether SCM_BOOT_GUILE_1 has already been called. This
410 variable is now here and not inside SCM_BOOT_GUILE_1 so that one
411 can tweak it. This is necessary for unexec to work. (Hey, "1-live"
412 is the name of a local radiostation...) */
414 int scm_boot_guile_1_live
= 0;
417 scm_boot_guile_1 (base
, closure
)
419 struct main_func_closure
*closure
;
421 static int initialized
= 0;
422 /* static int live = 0; */
423 setjmp_type setjmp_val
;
425 /* This function is not re-entrant. */
426 if (scm_boot_guile_1_live
)
429 scm_boot_guile_1_live
= 1;
431 scm_ints_disabled
= 1;
436 restart_stack (base
);
440 scm_ports_prehistory ();
441 scm_smob_prehistory ();
442 scm_tables_prehistory ();
443 scm_init_storage (0);
444 scm_init_subr_table ();
447 scm_init_threads (base
);
453 scm_init_arbiters ();
457 scm_init_continuations ();
462 scm_init_backtrace (); /* Requires fluids */
473 scm_init_keywords ();
486 scm_init_regex_posix ();
489 scm_init_procprop ();
493 #ifdef DEBUG_EXTENSIONS
496 scm_init_stackchk ();
497 scm_init_struct (); /* Requires struct */
499 scm_init_strports ();
503 scm_init_objects (); /* Requires struct */
504 scm_init_print (); /* Requires struct */
508 scm_init_strorder ();
511 scm_init_variable ();
515 scm_init_guardian ();
519 #ifdef DEBUG_EXTENSIONS
520 scm_init_debug (); /* Requires macro smobs */
526 scm_init_load_path ();
527 scm_init_standard_ports ();
528 scm_init_dynamic_linking ();
534 scm_block_gc
= 0; /* permit the gc to run */
535 /* ints still disabled */
537 #ifdef STACK_CHECKING
538 scm_stack_checking_enabled_p
= SCM_STACK_CHECKING_P
;
541 setjmp_val
= setjmp (SCM_JMPBUF (scm_rootcont
));
544 scm_set_program_arguments (closure
->argc
, closure
->argv
, 0);
545 scm_internal_lazy_catch (SCM_BOOL_T
, invoke_main_func
, closure
,
546 scm_handle_by_message
, 0);
549 scm_restore_signals ();
551 /* This tick gives any pending
552 * asyncs a chance to run. This must be done after
553 * the call to scm_restore_signals.
557 /* If the caller doesn't want this, they should return from
558 main_func themselves. */
564 invoke_main_func (body_data
)
567 struct main_func_closure
*closure
= (struct main_func_closure
*) body_data
;
569 scm_load_startup_files ();
571 (*closure
->main_func
) (closure
->closure
, closure
->argc
, closure
->argv
);
574 return SCM_UNDEFINED
;