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author | Keisuke Nishida <kxn30@po.cwru.edu> | 2001-04-22 02:13:48 +0000 |
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committer | Keisuke Nishida <kxn30@po.cwru.edu> | 2001-04-22 02:13:48 +0000 |
commit | ac99cb0cb153b1691b48115f098a0008b78f9702 (patch) | |
tree | 61097ad9a9ceff1f371dd927a02430bc81ea079b /src/frames.h | |
parent | ac02b386c2e5743b6ea96486af6ba2cc6583c12a (diff) | |
download | guile-ac99cb0cb153b1691b48115f098a0008b78f9702.tar.gz |
*** empty log message ***
Diffstat (limited to 'src/frames.h')
-rw-r--r-- | src/frames.h | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/src/frames.h b/src/frames.h new file mode 100644 index 000000000..ed28e56a8 --- /dev/null +++ b/src/frames.h @@ -0,0 +1,126 @@ +/* Copyright (C) 2001 Free Software Foundation, Inc. + * + * 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 2, 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 software; see the file COPYING. If not, write to + * the Free Software Foundation, Inc., 59 Temple Place, Suite 330, + * Boston, MA 02111-1307 USA + * + * As a special exception, the Free Software Foundation gives permission + * for additional uses of the text contained in its release of GUILE. + * + * The exception is that, if you link the GUILE library with other files + * to produce an executable, this does not by itself cause the + * resulting executable to be covered by the GNU General Public License. + * Your use of that executable is in no way restricted on account of + * linking the GUILE library code into it. + * + * This exception does not however invalidate any other reasons why + * the executable file might be covered by the GNU General Public License. + * + * This exception applies only to the code released by the + * Free Software Foundation under the name GUILE. If you copy + * code from other Free Software Foundation releases into a copy of + * GUILE, as the General Public License permits, the exception does + * not apply to the code that you add in this way. To avoid misleading + * anyone as to the status of such modified files, you must delete + * this exception notice from them. + * + * If you write modifications of your own for GUILE, it is your choice + * whether to permit this exception to apply to your modifications. + * If you do not wish that, delete this exception notice. */ + +#ifndef _SCM_FRAMES_H_ +#define _SCM_FRAMES_H_ + +#include <libguile.h> +#include "config.h" +#include "programs.h" + +/* + * VM Address + */ + +#define SCM_VM_MAKE_STACK_ADDRESS(ptr) SCM_PACK (ptr) +#define SCM_VM_STACK_ADDRESS(addr) ((SCM *) SCM_UNPACK (addr)) + +#define SCM_VM_MAKE_BYTE_ADDRESS(ptr) SCM_PACK (ptr) +#define SCM_VM_BYTE_ADDRESS(addr) ((scm_byte_t *) SCM_UNPACK (addr)) + + +/* + * VM Stack frames + */ + +/* Stack frames are allocated on the VM stack as follows: + + | | <- fp + bp->nargs + bp->nlocs + 3 + +------------------+ = SCM_STACK_FRAME_UPPER_ADDRESS (fp) + | Return address | + | Dynamic link | + | External link | <- fp + bp->nargs + bp->nlocs + | Local varialbe 1 | = SCM_STACK_FRAME_DATA_ADDRESS (fp) + | Local variable 0 | <- fp + bp->nargs + | Argument 1 | + | Argument 0 | <- fp + | Program | <- fp - 1 + +------------------+ = SCM_STACK_FRAME_LOWER_ADDRESS (fp) + | | +*/ + +#define SCM_STACK_FRAME_DATA_ADDRESS(fp) \ + (fp + SCM_PROGRAM_DATA (SCM_STACK_FRAME_PROGRAM (fp))->nargs \ + + SCM_PROGRAM_DATA (SCM_STACK_FRAME_PROGRAM (fp))->nlocs) +#define SCM_STACK_FRAME_UPPER_ADDRESS(fp) \ + (SCM_STACK_FRAME_DATA_ADDRESS (fp) + 3) +#define SCM_STACK_FRAME_LOWER_ADDRESS(fp) (fp - 1) + +#define SCM_STACK_FRAME_RETURN_ADDRESS(fp) SCM_STACK_FRAME_DATA_ADDRESS (fp)[2] +#define SCM_STACK_FRAME_DYNAMIC_LINK(fp) SCM_STACK_FRAME_DATA_ADDRESS (fp)[1] +#define SCM_STACK_FRAME_EXTERNAL_LINK(fp) SCM_STACK_FRAME_DATA_ADDRESS (fp)[0] +#define SCM_STACK_FRAME_VARIABLE(fp,i) fp[i] +#define SCM_STACK_FRAME_PROGRAM(fp) fp[-1] + + +/* + * VM Heap frames + */ + +struct scm_heap_frame { + SCM *fp; + SCM program; + SCM variables; + SCM dynamic_link; + SCM external_link; +}; + +extern scm_bits_t scm_tc16_heap_frame; + +#define SCM_HEAP_FRAME_P(x) SCM_SMOB_PREDICATE (scm_tc16_heap_frame, x) +#define SCM_HEAP_FRAME_DATA(f) ((struct scm_heap_frame *) SCM_SMOB_DATA (f)) +#define SCM_VALIDATE_HEAP_FRAME(p,x) SCM_MAKE_VALIDATE (p, x, HEAP_FRAME_P) + +#define SCM_HEAP_FRAME_PROGRAM(f) SCM_HEAP_FRAME_DATA (f)->program +#define SCM_HEAP_FRAME_VARIABLES(f) SCM_HEAP_FRAME_DATA (f)->variables +#define SCM_HEAP_FRAME_DYNAMIC_LINK(f) SCM_HEAP_FRAME_DATA (f)->dynamic_link +#define SCM_HEAP_FRAME_EXTERNAL_LINK(f) SCM_HEAP_FRAME_DATA (f)->external_link + +extern SCM scm_c_make_heap_frame (SCM *fp); +extern void scm_init_frames (void); + +#endif /* _SCM_FRAMES_H_ */ + +/* + Local Variables: + c-file-style: "gnu" + End: +*/ |