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/*
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Crown Copyright (c) 1997
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This TenDRA(r) Computer Program is subject to Copyright
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owned by the United Kingdom Secretary of State for Defence
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acting through the Defence Evaluation and Research Agency
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(DERA). It is made available to Recipients with a
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royalty-free licence for its use, reproduction, transfer
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to other parties and amendment for any purpose not excluding
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product development provided that any such use et cetera
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shall be deemed to be acceptance of the following conditions:-
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(1) Its Recipients shall ensure that this Notice is
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reproduced upon any copies or amended versions of it;
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(2) Any amended version of it shall be clearly marked to
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show both the nature of and the organisation responsible
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for the relevant amendment or amendments;
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(3) Its onward transfer from a recipient to another
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party shall be deemed to be that party's acceptance of
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these conditions;
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(4) DERA gives no warranty or assurance as to its
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quality or suitability for any purpose and DERA accepts
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no liability whatsoever in relation to any use to which
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it may be put.
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*/
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/**** exception.c --- Exception handling.
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*
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** Author: Steve Folkes <smf@hermes.mod.uk>
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*
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**** Commentary:
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*
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* This file implements the exception handling facility specified in the file
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* "exception.h". See that file for more details.
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*
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**** Change Log:
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* $Log: exception.c,v $
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* Revision 1.1.1.1 1998/01/17 15:57:18 release
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* First version to be checked into rolling release.
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*
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* Revision 1.2 1994/12/12 11:45:32 smf
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* Performing changes for 'CR94_178.sid+tld-update' - bringing in line with
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* OSSG C Coding Standards.
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*
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* Revision 1.1.1.1 1994/07/25 16:06:10 smf
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* Initial import of os-interface shared files.
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*
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**/
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/****************************************************************************/
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#include "exception.h"
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extern void E_exception_unhandled
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PROTO_S ((ExceptionP, CStringP, unsigned));
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extern void E_exception_corrupt_handler
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PROTO_S ((CStringP, unsigned));
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/*--------------------------------------------------------------------------*/
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HandlerP X__exception_handler_stack = NIL (HandlerP);
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ThrowDataT X__exception_throw_data;
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/*--------------------------------------------------------------------------*/
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NoReturnT
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X__exception_throw PROTO_Z ()
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{
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static BoolT failing = FALSE;
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HandlerP stack = X__exception_handler_stack;
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if (failing) {
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abort ();
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UNREACHED;
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} else if (stack == NIL (HandlerP)) {
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failing = TRUE;
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E_exception_unhandled (X__exception_throw_data.exception,
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X__exception_throw_data.file,
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X__exception_throw_data.line);
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abort ();
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UNREACHED;
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}
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#ifdef PO_EXCEPTION_STACK_DIRECTION
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if ((stack->magic_start != X__EXCEPTION_MAGIC) ||
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(stack->magic_end != X__EXCEPTION_MAGIC) ||
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#if PO_EXCEPTION_STACK_DIRECTION > 0
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(((GenericP) stack) > ((GenericP) &stack)) ||
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#endif /* PO_EXCEPTION_STACK_DIRECTION > 0 */
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#if PO_EXCEPTION_STACK_DIRECTION < 0
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(((GenericP) stack) < ((GenericP) &stack)) ||
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#endif /* PO_EXCEPTION_STACK_DIRECTION < 0 */
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(stack->next == stack)) {
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failing = TRUE;
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E_exception_corrupt_handler (stack->file, stack->line);
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abort ();
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UNREACHED;
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}
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#endif /* defined (PO_EXCEPTION_STACK_DIRECTION) */
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longjmp (X__exception_handler_stack->buffer, 1);
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UNREACHED;
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}
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CStringP
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exception_name PROTO_N ((exc))
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PROTO_T (ExceptionP exc)
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{
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return (exc);
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}
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