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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.c | |
parent | ac02b386c2e5743b6ea96486af6ba2cc6583c12a (diff) | |
download | guile-ac99cb0cb153b1691b48115f098a0008b78f9702.tar.gz |
*** empty log message ***
Diffstat (limited to 'src/frames.c')
-rw-r--r-- | src/frames.c | 184 |
1 files changed, 184 insertions, 0 deletions
diff --git a/src/frames.c b/src/frames.c new file mode 100644 index 000000000..382342008 --- /dev/null +++ b/src/frames.c @@ -0,0 +1,184 @@ +/* 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. */ + +#include <string.h> +#include "frames.h" + + +scm_bits_t scm_tc16_heap_frame; + +SCM +scm_c_make_heap_frame (SCM *fp) +{ + struct scm_heap_frame *p = + scm_must_malloc (sizeof (struct scm_heap_frame), "make_heap_frame"); + p->fp = fp; + p->program = SCM_UNDEFINED; + p->variables = SCM_UNDEFINED; + p->dynamic_link = SCM_UNDEFINED; + p->external_link = SCM_UNDEFINED; + SCM_RETURN_NEWSMOB (scm_tc16_heap_frame, p); +} + +static SCM +heap_frame_mark (SCM obj) +{ + struct scm_heap_frame *p = SCM_HEAP_FRAME_DATA (obj); + scm_gc_mark (p->program); + scm_gc_mark (p->variables); + scm_gc_mark (p->dynamic_link); + return p->external_link; +} + +/* Scheme interface */ + +SCM_DEFINE (scm_frame_p, "frame?", 1, 0, 0, + (SCM obj), + "") +#define FUNC_NAME s_scm_frame_p +{ + return SCM_BOOL (SCM_HEAP_FRAME_P (obj)); +} +#undef FUNC_NAME + +SCM_DEFINE (scm_frame_program, "frame-program", 1, 0, 0, + (SCM frame), + "") +#define FUNC_NAME s_scm_frame_program +{ + SCM_VALIDATE_HEAP_FRAME (1, frame); + return SCM_STACK_FRAME_PROGRAM (SCM_HEAP_FRAME_DATA (frame)->fp); +} +#undef FUNC_NAME + +SCM_DEFINE (scm_frame_local_variables, "frame-local-variables", 1, 0, 0, + (SCM frame), + "") +#define FUNC_NAME s_scm_frame_local_variables +{ + struct scm_heap_frame *p; + + SCM_VALIDATE_HEAP_FRAME (1, frame); + p = SCM_HEAP_FRAME_DATA (frame); + + if (SCM_UNBNDP (p->variables)) + { + SCM prog = scm_frame_program (frame); + struct scm_program *pp = SCM_PROGRAM_DATA (prog); + int i, size = pp->nargs + pp->nlocs; + p->variables = scm_make_vector (SCM_MAKINUM (size), SCM_BOOL_F); + for (i = 0; i < size; i++) + SCM_VELTS (p->variables)[i] = SCM_STACK_FRAME_VARIABLE (p->fp, i); + } + return p->variables; +} +#undef FUNC_NAME + +SCM_DEFINE (scm_frame_return_address, "frame-return-address", 1, 0, 0, + (SCM frame), + "") +#define FUNC_NAME s_scm_frame_return_address +{ + SCM_VALIDATE_HEAP_FRAME (1, frame); + + return scm_long2num ((long) SCM_VM_BYTE_ADDRESS + (SCM_STACK_FRAME_RETURN_ADDRESS + (SCM_HEAP_FRAME_DATA (frame)->fp))); +} +#undef FUNC_NAME + +SCM_DEFINE (scm_frame_dynamic_link, "frame-dynamic-link", 1, 0, 0, + (SCM frame), + "") +#define FUNC_NAME s_scm_frame_dynamic_link +{ + struct scm_heap_frame *p; + + SCM_VALIDATE_HEAP_FRAME (1, frame); + p = SCM_HEAP_FRAME_DATA (frame); + + if (SCM_UNBNDP (p->dynamic_link)) + { + SCM *fp = SCM_VM_STACK_ADDRESS (SCM_STACK_FRAME_DYNAMIC_LINK (p->fp)); + if (fp) + p->dynamic_link = scm_c_make_heap_frame (fp); + else + p->dynamic_link = SCM_BOOL_F; + } + + return p->dynamic_link; +} +#undef FUNC_NAME + +SCM_DEFINE (scm_frame_external_link, "frame-external-link", 1, 0, 0, + (SCM frame), + "") +#define FUNC_NAME s_scm_frame_external_link +{ + struct scm_heap_frame *p; + + SCM_VALIDATE_HEAP_FRAME (1, frame); + p = SCM_HEAP_FRAME_DATA (frame); + + if (SCM_UNBNDP (p->external_link)) + p->external_link = SCM_STACK_FRAME_EXTERNAL_LINK (p->fp); + + return p->external_link; +} +#undef FUNC_NAME + + +void +scm_init_frames (void) +{ + scm_tc16_heap_frame = scm_make_smob_type ("heap_frame", 0); + scm_set_smob_mark (scm_tc16_heap_frame, heap_frame_mark); + +#ifndef SCM_MAGIC_SNARFER +#include "frames.x" +#endif +} + +/* + Local Variables: + c-file-style: "gnu" + End: +*/ |