138 lines
4.2 KiB
C
138 lines
4.2 KiB
C
/***********************************************************************/
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/* */
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/* Objective Caml */
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/* */
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/* Xavier Leroy and Damien Doligez, INRIA Rocquencourt */
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/* */
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/* Copyright 1996 Institut National de Recherche en Informatique et */
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/* en Automatique. All rights reserved. This file is distributed */
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/* under the terms of the GNU Library General Public License, with */
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/* the special exception on linking described in file ../LICENSE. */
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/* */
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/***********************************************************************/
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/* $Id$ */
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/* Start-up code */
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#include <stdio.h>
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#include <stdlib.h>
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#include "callback.h"
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#include "custom.h"
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#include "fail.h"
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#include "gc.h"
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#include "gc_ctrl.h"
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#include "misc.h"
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#include "mlvalues.h"
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#include "printexc.h"
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#include "sys.h"
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#ifdef HAS_UI
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#include "ui.h"
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#endif
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extern int parser_trace;
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header_t atom_table[256];
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char * static_data_start, * static_data_end;
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char * code_area_start, * code_area_end;
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/* Initialize the atom table and the static data and code area limits. */
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struct segment { char * begin; char * end; };
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static void minmax_table(struct segment *table, char **min, char **max)
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{
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int i;
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*min = table[0].begin;
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*max = table[0].end;
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for (i = 1; table[i].begin != 0; i++) {
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if (table[i].begin < *min) *min = table[i].begin;
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if (table[i].end > *max) *max = table[i].end;
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}
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}
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static void init_atoms(void)
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{
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int i;
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extern struct segment caml_data_segments[], caml_code_segments[];
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for (i = 0; i < 256; i++) atom_table[i] = Make_header(0, i, Caml_white);
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minmax_table(caml_data_segments, &static_data_start, &static_data_end);
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minmax_table(caml_code_segments, &code_area_start, &code_area_end);
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}
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/* Configuration parameters and flags */
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static unsigned long percent_free_init = Percent_free_def;
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static unsigned long max_percent_free_init = Max_percent_free_def;
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static unsigned long minor_heap_init = Minor_heap_def;
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static unsigned long heap_chunk_init = Heap_chunk_def;
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static unsigned long heap_size_init = Init_heap_def;
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static unsigned long max_stack_init = Max_stack_def;
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/* Parse the CAMLRUNPARAM variable */
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/* The option letter for each runtime option is the first letter of the
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last word of the ML name of the option (see [stdlib/gc.mli]).
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Except for l (maximum stack size) and h (initial heap size).
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*/
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/* Note: option l is irrelevant to the native-code runtime. */
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static void scanmult (char *opt, long unsigned int *var)
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{
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char mult = ' ';
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sscanf (opt, "=%lu%c", var, &mult);
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if (mult == 'k') *var = *var * 1024;
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if (mult == 'M') *var = *var * (1024 * 1024);
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if (mult == 'G') *var = *var * (1024 * 1024 * 1024);
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}
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static void parse_camlrunparam(void)
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{
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char *opt = getenv ("OCAMLRUNPARAM");
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if (opt == NULL) opt = getenv ("CAMLRUNPARAM");
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if (opt != NULL){
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while (*opt != '\0'){
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switch (*opt++){
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case 's': scanmult (opt, &minor_heap_init); break;
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case 'i': scanmult (opt, &heap_chunk_init); break;
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case 'h': scanmult (opt, &heap_size_init); break;
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case 'l': scanmult (opt, &max_stack_init); break;
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case 'o': scanmult (opt, &percent_free_init); break;
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case 'O': scanmult (opt, &max_percent_free_init); break;
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case 'v': scanmult (opt, &verb_gc); break;
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case 'p': parser_trace = 1; break;
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}
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}
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}
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}
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extern value caml_start_program (void);
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extern void init_ieee_floats (void);
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extern void init_signals (void);
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void caml_main(char **argv)
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{
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value res;
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init_ieee_floats();
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init_custom_operations();
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#ifdef DEBUG
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verb_gc = 63;
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#endif
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parse_camlrunparam();
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init_gc (minor_heap_init, heap_size_init, heap_chunk_init,
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percent_free_init, max_percent_free_init);
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init_atoms();
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init_signals();
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sys_init(argv);
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res = caml_start_program();
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if (Is_exception_result(res))
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fatal_uncaught_exception(Extract_exception(res));
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}
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void caml_startup(char **argv)
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{
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caml_main(argv);
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}
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