143 lines
3.8 KiB
C
143 lines
3.8 KiB
C
/***********************************************************************/
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/* */
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/* Objective Caml */
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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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/* $Id$ */
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/* Raising exceptions from C. */
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#include "alloc.h"
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#include "fail.h"
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#include "io.h"
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#include "gc.h"
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#include "memory.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 "signals.h"
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#include "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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CAMLparam1 (tag);
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CAMLlocal1 (bucket);
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bucket = caml_alloc_small (1, 0);
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Field(bucket, 0) = tag;
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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_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_string(value tag, char const *msg)
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{
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CAMLparam1 (tag);
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CAMLlocal1 (vmsg);
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vmsg = caml_copy_string(msg);
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caml_raise_with_arg(tag, vmsg);
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CAMLnoreturn;
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}
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CAMLexport void caml_failwith (char const *msg)
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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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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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/* Problem: we can't use [caml_raise_constant], because it allocates and
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we're out of memory... Here, we allocate statically the exn bucket
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for [Out_of_memory]. */
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static struct {
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header_t hdr;
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value exn;
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} out_of_memory_bucket = { 0, 0 };
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CAMLexport void caml_raise_out_of_memory(void)
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{
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if (out_of_memory_bucket.exn == 0)
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caml_fatal_error
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("Fatal error: out of memory while raising Out_of_memory\n");
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caml_raise((value) &(out_of_memory_bucket.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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/* Initialization of statically-allocated exception buckets */
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void caml_init_exceptions(void)
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{
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out_of_memory_bucket.hdr = Make_header(1, 0, Caml_white);
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out_of_memory_bucket.exn = Field(caml_global_data, OUT_OF_MEMORY_EXN);
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caml_register_global_root(&out_of_memory_bucket.exn);
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}
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