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(* M2EXCEPTION.mod implements access to the exception state.
Copyright (C) 2003-2023 Free Software Foundation, Inc.
Contributed by Gaius Mulley <gaius.mulley@southwales.ac.uk>.
This file is part of GNU Modula-2.
GNU Modula-2 is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
GNU Modula-2 is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. *)
IMPLEMENTATION MODULE M2EXCEPTION ;
IMPORT RTExceptions ;
FROM SYSTEM IMPORT ADR ;
PROCEDURE M2Exception () : M2Exceptions ;
(* If the current coroutine is in the exceptional execution state because of the raising
of a language exception, returns the corresponding enumeration value, and otherwise
raises an exception.
*)
BEGIN
IF IsM2Exception()
THEN
RETURN( VAL(M2Exceptions, RTExceptions.GetNumber(RTExceptions.GetExceptionBlock())) )
ELSE
RTExceptions.Raise(ORD(exException),
ADR(__FILE__), __LINE__, __COLUMN__, ADR(__FUNCTION__),
ADR('current coroutine is not in the exceptional execution state'))
END
END M2Exception ;
PROCEDURE IsM2Exception () : BOOLEAN ;
(* If the current coroutine is in the exceptional execution state because of the raising
of a language exception, returns TRUE, and otherwise returns FALSE.
*)
BEGIN
RETURN(
RTExceptions.IsInExceptionState() AND
(RTExceptions.GetBaseExceptionBlock()=RTExceptions.GetExceptionBlock())
)
END IsM2Exception ;
END M2EXCEPTION.
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