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- /*
- Copyright (C) 1994 M. Hagiya, W. Schelter, T. Yuasa
-
- This file is part of GNU Common Lisp, herein referred to as GCL
-
- GCL is free software; you can redistribute it and/or modify it under
- the terms of the GNU LIBRARY GENERAL PUBLIC LICENSE as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
-
- GCL 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 Library General Public
- License for more details.
-
- You should have received a copy of the GNU Library General Public License
- along with GCL; see the file COPYING. If not, write to the Free Software
- Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
-
- */
-
- /*
- bds.h
-
- bind stack
- */
-
- #define BDSSIZE 1024
- #define BDSGETA 40
-
- struct bds_bd {
- object bds_sym; /* symbol */
- object bds_val; /* previous value of the symbol */
- };
-
- struct bds_bd bind_stack[BDSSIZE + BDSGETA + BDSGETA];
-
- typedef struct bds_bd *bds_ptr;
-
- bds_ptr bds_org;
-
- bds_ptr bds_limit;
-
- bds_ptr bds_top; /* bind stack top */
-
- #ifdef KCLOVM
-
- /* for multiprocessing */
- struct bds_bd save_bind_stack[BDSSIZE + BDSGETA + BDSGETA];
- bds_ptr bds_save_org;
- bds_ptr bds_save_limit;
- bds_ptr bds_save_top;
-
- #endif
-
- #define bds_check \
- if (bds_top >= bds_limit) \
- bds_overflow()
-
- #define bds_bind(sym, val) \
- (++bds_top)->bds_sym = (sym); \
- bds_top->bds_val = (sym)->s.s_dbind; \
- (sym)->s.s_dbind = (val)
-
- #define bds_unwind1 \
- ((bds_top->bds_sym)->s.s_dbind = bds_top->bds_val, --bds_top)
-