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/**************************************************************************/
/* */
/* OCaml */
/* */
/* Xavier Leroy and Damien Doligez, INRIA Rocquencourt */
/* */
/* Copyright 1996 Institut National de Recherche en Informatique et */
/* en Automatique. */
/* */
/* All rights reserved. This file is distributed under the terms of */
/* the GNU Lesser General Public License version 2.1, with the */
/* special exception on linking described in the file LICENSE. */
/* */
/**************************************************************************/
#define CAML_INTERNALS
/* Some runtime initialization functions that are common to bytecode
and native code. */
#include <stdio.h>
#include "caml/backtrace.h"
#include "caml/memory.h"
#include "caml/callback.h"
#include "caml/major_gc.h"
#ifndef NATIVE_CODE
#include "caml/dynlink.h"
#endif
#include "caml/osdeps.h"
#include "caml/startup_aux.h"
#include "caml/prims.h"
#include "caml/signals.h"
#ifdef _WIN32
extern void caml_win32_unregister_overflow_detection (void);
#endif
/* Configuration parameters and flags */
static struct caml_params params;
const struct caml_params* const caml_params = ¶ms;
static void init_startup_params(void)
{
#ifndef NATIVE_CODE
char_os * cds_file;
#endif
params.init_percent_free = Percent_free_def;
params.init_minor_heap_wsz = Minor_heap_def;
params.init_custom_major_ratio = Custom_major_ratio_def;
params.init_custom_minor_ratio = Custom_minor_ratio_def;
params.init_custom_minor_max_bsz = Custom_minor_max_bsz_def;
params.init_max_stack_wsz = Max_stack_def;
params.runtime_events_log_wsize = Default_runtime_events_log_wsize;
#ifdef DEBUG
atomic_store_relaxed(&caml_verb_gc, 0x3F);
#endif
#ifndef NATIVE_CODE
cds_file = caml_secure_getenv(T("CAML_DEBUG_FILE"));
if (cds_file != NULL) {
params.cds_file = caml_stat_strdup_os(cds_file);
}
#endif
params.trace_level = 0;
params.cleanup_on_exit = 0;
params.print_magic = 0;
params.print_config = 0;
}
static void scanmult (char_os *opt, uintnat *var)
{
char_os mult = ' ';
unsigned int val = 1;
sscanf_os (opt, T("=%u%c"), &val, &mult);
sscanf_os (opt, T("=0x%x%c"), &val, &mult);
switch (mult) {
case 'k': *var = (uintnat) val * 1024; break;
case 'M': *var = (uintnat) val * (1024 * 1024); break;
case 'G': *var = (uintnat) val * (1024 * 1024 * 1024); break;
case 'v': atomic_store_relaxed((atomic_uintnat *)var, val); break;
default: *var = (uintnat) val; break;
}
}
void caml_parse_ocamlrunparam(void)
{
init_startup_params();
char_os *opt = caml_secure_getenv (T("OCAMLRUNPARAM"));
if (opt == NULL) opt = caml_secure_getenv (T("CAMLRUNPARAM"));
if (opt != NULL){
while (*opt != '\0'){
switch (*opt++){
case 'b': scanmult (opt, ¶ms.backtrace_enabled); break;
case 'c': scanmult (opt, ¶ms.cleanup_on_exit); break;
case 'e': scanmult (opt, ¶ms.runtime_events_log_wsize); break;
case 'l': scanmult (opt, ¶ms.init_max_stack_wsz); break;
case 'M': scanmult (opt, ¶ms.init_custom_major_ratio); break;
case 'm': scanmult (opt, ¶ms.init_custom_minor_ratio); break;
case 'n': scanmult (opt, ¶ms.init_custom_minor_max_bsz); break;
case 'o': scanmult (opt, ¶ms.init_percent_free); break;
case 'p': scanmult (opt, ¶ms.parser_trace); break;
case 'R': break; /* see stdlib/hashtbl.mli */
case 's': scanmult (opt, ¶ms.init_minor_heap_wsz); break;
case 't': scanmult (opt, ¶ms.trace_level); break;
case 'v': scanmult (opt, (uintnat *)&caml_verb_gc); break;
case 'V': scanmult (opt, ¶ms.verify_heap); break;
case 'W': scanmult (opt, &caml_runtime_warnings); break;
case ',': continue;
}
while (*opt != '\0'){
if (*opt++ == ',') break;
}
}
}
}
/* The number of outstanding calls to caml_startup */
static int startup_count = 0;
/* Has the runtime been shut down already? */
static int shutdown_happened = 0;
int caml_startup_aux(int pooling)
{
if (shutdown_happened == 1)
caml_fatal_error("caml_startup was called after the runtime "
"was shut down with caml_shutdown");
/* Second and subsequent calls are ignored,
since the runtime has already started */
startup_count++;
if (startup_count > 1)
return 0;
if (pooling)
caml_stat_create_pool();
return 1;
}
static void call_registered_value(char* name)
{
const value *f = caml_named_value(name);
if (f != NULL)
caml_callback_exn(*f, Val_unit);
}
CAMLexport void caml_shutdown(void)
{
Caml_check_caml_state();
if (startup_count <= 0)
caml_fatal_error("a call to caml_shutdown has no "
"corresponding call to caml_startup");
/* Do nothing unless it's the last call remaining */
startup_count--;
if (startup_count > 0)
return;
call_registered_value("Pervasives.do_at_exit");
call_registered_value("Thread.at_shutdown");
caml_finalise_heap();
caml_free_locale();
#ifndef NATIVE_CODE
caml_free_shared_libs();
#endif
caml_stat_destroy_pool();
caml_terminate_signals();
#if defined(_WIN32) && defined(NATIVE_CODE)
caml_win32_unregister_overflow_detection();
#endif
shutdown_happened = 1;
}
void caml_init_exe_name(const char_os* exe_name)
{
params.exe_name = exe_name;
}
void caml_init_section_table(const char* section_table,
asize_t section_table_size)
{
params.section_table = section_table;
params.section_table_size = section_table_size;
}
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