146 lines
4.0 KiB
C
146 lines
4.0 KiB
C
/***********************************************************************/
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/* */
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/* OCaml */
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/* */
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/* Xavier Leroy, projet Cristal, 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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/* Raising exceptions from C. */
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#include <stdio.h>
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#include <stdlib.h>
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#include "caml/alloc.h"
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#include "caml/fail.h"
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#include "caml/io.h"
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#include "caml/gc.h"
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#include "caml/memory.h"
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#include "caml/misc.h"
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#include "caml/mlvalues.h"
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#include "caml/printexc.h"
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#include "caml/signals.h"
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#include "caml/stacks.h"
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CAMLexport struct longjmp_buffer * caml_external_raise = NULL;
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value caml_exn_bucket;
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CAMLexport void caml_raise(value v)
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{
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Unlock_exn();
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caml_exn_bucket = v;
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if (caml_external_raise == NULL) caml_fatal_uncaught_exception(v);
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siglongjmp(caml_external_raise->buf, 1);
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}
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CAMLexport void caml_raise_constant(value tag)
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{
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caml_raise(tag);
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}
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CAMLexport void caml_raise_with_arg(value tag, value arg)
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{
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CAMLparam2 (tag, arg);
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CAMLlocal1 (bucket);
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bucket = caml_alloc_small (2, 0);
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Field(bucket, 0) = tag;
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Field(bucket, 1) = arg;
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caml_raise(bucket);
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CAMLnoreturn;
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}
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CAMLexport void caml_raise_with_args(value tag, int nargs, value args[])
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{
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CAMLparam1 (tag);
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CAMLxparamN (args, nargs);
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value bucket;
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int i;
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Assert(1 + nargs <= Max_young_wosize);
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bucket = caml_alloc_small (1 + nargs, 0);
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Field(bucket, 0) = tag;
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for (i = 0; i < nargs; i++) Field(bucket, 1 + i) = args[i];
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caml_raise(bucket);
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CAMLnoreturn;
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}
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CAMLexport void caml_raise_with_string(value tag, char const *msg)
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{
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CAMLparam1(tag);
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value v_msg = caml_copy_string(msg);
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caml_raise_with_arg(tag, v_msg);
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CAMLnoreturn;
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}
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/* PR#5115: Failure and Invalid_argument can be triggered by
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input_value while reading the initial value of [caml_global_data]. */
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CAMLexport void caml_failwith (char const *msg)
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{
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if (caml_global_data == 0) {
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fprintf(stderr, "Fatal error: exception Failure(\"%s\")\n", msg);
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exit(2);
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}
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caml_raise_with_string(Field(caml_global_data, FAILURE_EXN), msg);
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}
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CAMLexport void caml_invalid_argument (char const *msg)
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{
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if (caml_global_data == 0) {
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fprintf(stderr, "Fatal error: exception Invalid_argument(\"%s\")\n", msg);
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exit(2);
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}
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caml_raise_with_string(Field(caml_global_data, INVALID_EXN), msg);
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}
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CAMLexport void caml_array_bound_error(void)
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{
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caml_invalid_argument("index out of bounds");
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}
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CAMLexport void caml_raise_out_of_memory(void)
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{
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caml_raise_constant(Field(caml_global_data, OUT_OF_MEMORY_EXN));
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}
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CAMLexport void caml_raise_stack_overflow(void)
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{
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caml_raise_constant(Field(caml_global_data, STACK_OVERFLOW_EXN));
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}
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CAMLexport void caml_raise_sys_error(value msg)
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{
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caml_raise_with_arg(Field(caml_global_data, SYS_ERROR_EXN), msg);
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}
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CAMLexport void caml_raise_end_of_file(void)
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{
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caml_raise_constant(Field(caml_global_data, END_OF_FILE_EXN));
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}
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CAMLexport void caml_raise_zero_divide(void)
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{
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caml_raise_constant(Field(caml_global_data, ZERO_DIVIDE_EXN));
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}
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CAMLexport void caml_raise_not_found(void)
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{
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caml_raise_constant(Field(caml_global_data, NOT_FOUND_EXN));
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}
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CAMLexport void caml_raise_sys_blocked_io(void)
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{
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caml_raise_constant(Field(caml_global_data, SYS_BLOCKED_IO));
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}
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int caml_is_special_exception(value exn) {
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return exn == Field(caml_global_data, MATCH_FAILURE_EXN)
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|| exn == Field(caml_global_data, ASSERT_FAILURE_EXN)
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|| exn == Field(caml_global_data, UNDEFINED_RECURSIVE_MODULE_EXN);
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}
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