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- /*
- C BASED FORTH-83 MULTI-TASKING KERNEL: EXCEPTION MANAGEMENT
-
- Copyright (C) 1988-1990 by Mikael R.K. Patel
-
- Computer Aided Design Laboratory (CADLAB)
- Department of Computer and Information Science
- Linkoping University
- S-581 83 LINKOPING
- SWEDEN
-
- Email: mip@ida.liu.se
-
- Started on: 30 June 1988
-
- Last updated on: 22 April 1990
-
- Dependencies:
- (cc) kernel.c, kernel.h
-
- Description:
- Error signal and exception extension vocabulary of the
- tile forth multi-tasking kernel.
-
- Copying:
- This program 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 1, or (at your option)
- any later version.
-
- This program 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.
-
- You should have received a copy of the GNU General Public License
- along with this program; see the file COPYING. If not, write to
- the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
-
- */
-
- VOID doexception()
- {
- spush(NIL, INT32);
- spush(NORMAL, INT32);
- spush(EXCEPTION, INT32);
- spush(' ', INT32);
- doword();
- doentry();
- }
-
- NORMAL_CODE(exception, forth, "exception", doexception);
-
- VOID doparenexceptionsemicolon()
- {
- fthrow();
- }
-
- COMPILATION_CODE(parenexceptionsemicolon, exception, "(exception;)", doparenexceptionsemicolon);
-
- VOID doparenexceptionunlinksemicolon()
- {
- funlink();
- fthrow();
- }
-
- COMPILATION_CODE(parenexceptionunlinksemicolon, parenexceptionsemicolon, "(exceptionunlink;)", doparenexceptionunlinksemicolon);
-
- VOID doparenexception()
- {
- fcatch();
- }
-
- COMPILATION_CODE(parenexception, parenexceptionunlinksemicolon, "(exception>)", doparenexception);
-
- VOID doexceptionsharp()
- {
- ENTRY t;
-
- /* Set up pointer to last definition */
- dolast();
- t = spop(ENTRY);
-
- /* Compile an exit of the current definition */
- if (theframed != NIL) {
- spush(&parenexceptionunlinksemicolon, CODE_ENTRY);
- }
- else {
- spush(&parenexceptionsemicolon, CODE_ENTRY);
- }
- dothread();
- doremovelocals();
-
- /* Redefine the code type of the last definition */
- t -> code = (INT32) dp;
-
- /* Compile the run time exception management definition */
- spush(&parenexception, CODE_ENTRY);
- dothread();
- }
-
- COMPILATION_IMMEDIATE_CODE(exceptionsharp, parenexception, "exception>", doexceptionsharp);
-
- VOID doraise()
- {
- INT32 s = spop(INT32);
-
- /* Check if there is an exception block available */
- if (ep != NIL) {
-
- /* Restore the call environment */
- rp = ep;
- ep = (PTR32) rpop();
- fp = (PTR32) rpop();
- ip = (PTR32) rpop();
- sp = (PTR) rpop();
- tos.INT32 = rpop();
-
- /* Pass on the signal or exception to the exception block */
- spush(s, INT32);
- }
- else {
-
- /* Call low level management of signal */
- (VOID) error_signal(s);
- }
- }
-
- NORMAL_CODE(raise, exceptionsharp, "raise", doraise);
-
-