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/***********************************************************************/
/* */
/* Objective Caml */
/* */
/* Xavier Leroy, projet Cristal, 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 Library General Public License, with */
/* the special exception on linking described in file ../LICENSE. */
/* */
/***********************************************************************/
/* $Id: fail.c 9030 2008-09-18 11:23:28Z xleroy $ */
/* Raising exceptions from C. */
#include "alloc.h"
#include "fail.h"
#include "io.h"
#include "gc.h"
#include "memory.h"
#include "misc.h"
#include "mlvalues.h"
#include "printexc.h"
#include "signals.h"
#include "stacks.h"
CAMLexport struct longjmp_buffer * caml_external_raise = NULL;
value caml_exn_bucket;
CAMLexport void caml_raise(value v)
{
Unlock_exn();
caml_exn_bucket = v;
if (caml_external_raise == NULL) caml_fatal_uncaught_exception(v);
siglongjmp(caml_external_raise->buf, 1);
}
CAMLexport void caml_raise_constant(value tag)
{
CAMLparam1 (tag);
CAMLlocal1 (bucket);
bucket = caml_alloc_small (1, 0);
Field(bucket, 0) = tag;
caml_raise(bucket);
CAMLnoreturn;
}
CAMLexport void caml_raise_with_arg(value tag, value arg)
{
CAMLparam2 (tag, arg);
CAMLlocal1 (bucket);
bucket = caml_alloc_small (2, 0);
Field(bucket, 0) = tag;
Field(bucket, 1) = arg;
caml_raise(bucket);
CAMLnoreturn;
}
CAMLexport void caml_raise_with_args(value tag, int nargs, value args[])
{
CAMLparam1 (tag);
CAMLxparamN (args, nargs);
value bucket;
int i;
Assert(1 + nargs <= Max_young_wosize);
bucket = caml_alloc_small (1 + nargs, 0);
Field(bucket, 0) = tag;
for (i = 0; i < nargs; i++) Field(bucket, 1 + i) = args[i];
caml_raise(bucket);
CAMLnoreturn;
}
CAMLexport void caml_raise_with_string(value tag, char const *msg)
{
CAMLparam1 (tag);
CAMLlocal1 (vmsg);
vmsg = caml_copy_string(msg);
caml_raise_with_arg(tag, vmsg);
CAMLnoreturn;
}
CAMLexport void caml_failwith (char const *msg)
{
caml_raise_with_string(Field(caml_global_data, FAILURE_EXN), msg);
}
CAMLexport void caml_invalid_argument (char const *msg)
{
caml_raise_with_string(Field(caml_global_data, INVALID_EXN), msg);
}
CAMLexport void caml_array_bound_error(void)
{
caml_invalid_argument("index out of bounds");
}
/* Problem: we can't use [caml_raise_constant], because it allocates and
we're out of memory... Here, we allocate statically the exn bucket
for [Out_of_memory]. */
static struct {
header_t hdr;
value exn;
} out_of_memory_bucket = { 0, 0 };
CAMLexport void caml_raise_out_of_memory(void)
{
if (out_of_memory_bucket.exn == 0)
caml_fatal_error
("Fatal error: out of memory while raising Out_of_memory\n");
caml_raise((value) &(out_of_memory_bucket.exn));
}
CAMLexport void caml_raise_stack_overflow(void)
{
caml_raise_constant(Field(caml_global_data, STACK_OVERFLOW_EXN));
}
CAMLexport void caml_raise_sys_error(value msg)
{
caml_raise_with_arg(Field(caml_global_data, SYS_ERROR_EXN), msg);
}
CAMLexport void caml_raise_end_of_file(void)
{
caml_raise_constant(Field(caml_global_data, END_OF_FILE_EXN));
}
CAMLexport void caml_raise_zero_divide(void)
{
caml_raise_constant(Field(caml_global_data, ZERO_DIVIDE_EXN));
}
CAMLexport void caml_raise_not_found(void)
{
caml_raise_constant(Field(caml_global_data, NOT_FOUND_EXN));
}
CAMLexport void caml_raise_sys_blocked_io(void)
{
caml_raise_constant(Field(caml_global_data, SYS_BLOCKED_IO));
}
/* Initialization of statically-allocated exception buckets */
void caml_init_exceptions(void)
{
out_of_memory_bucket.hdr = Make_header(1, 0, Caml_white);
out_of_memory_bucket.exn = Field(caml_global_data, OUT_OF_MEMORY_EXN);
caml_register_global_root(&out_of_memory_bucket.exn);
}
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