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authorLudovic Courtès <ludo@gnu.org>2009-09-02 00:07:27 +0200
committerLudovic Courtès <ludo@gnu.org>2009-09-02 01:37:37 +0200
commit5f236208d0d864546e59afa0f5a11c9b3ba14b10 (patch)
treeeed5d9203a2633c8efb85c1b36425eab87574299 /libguile/frames.h
parentf0eb5ae6c173aed35965b0561897fda1d8ff0db1 (diff)
parentd7e7a02a6251c8ed4f76933d9d30baeee3f599c0 (diff)
downloadguile-5f236208d0d864546e59afa0f5a11c9b3ba14b10.tar.gz
Merge branch 'boehm-demers-weiser-gc' into bdw-gc-static-alloc
Conflicts: acinclude.m4 libguile/strings.c
Diffstat (limited to 'libguile/frames.h')
-rw-r--r--libguile/frames.h126
1 files changed, 126 insertions, 0 deletions
diff --git a/libguile/frames.h b/libguile/frames.h
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+/* Copyright (C) 2001, 2009 Free Software Foundation, Inc.
+ * *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License
+ * as published by the Free Software Foundation; either version 3 of
+ * the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ */
+
+#ifndef _SCM_FRAMES_H_
+#define _SCM_FRAMES_H_
+
+#include <libguile.h>
+#include "programs.h"
+
+
+/*
+ * VM frames
+ */
+
+/* VM Frame Layout
+ ---------------
+
+ | ... |
+ | Intermed. val. 0 | <- fp + bp->nargs + bp->nlocs = SCM_FRAME_UPPER_ADDRESS (fp)
+ +==================+
+ | Local variable 1 |
+ | Local variable 0 | <- fp + bp->nargs
+ | Argument 1 |
+ | Argument 0 | <- fp
+ | Program | <- fp - 1
+ +------------------+
+ | Return address |
+ | MV return address|
+ | Dynamic link | <- fp - 4 = SCM_FRAME_DATA_ADDRESS (fp) = SCM_FRAME_LOWER_ADDRESS (fp)
+ +==================+
+ | |
+
+ As can be inferred from this drawing, it is assumed that
+ `sizeof (SCM *) == sizeof (SCM)', since pointers (the `link' parts) are
+ assumed to be as long as SCM objects. */
+
+#define SCM_FRAME_DATA_ADDRESS(fp) (fp - 4)
+#define SCM_FRAME_UPPER_ADDRESS(fp) \
+ (fp \
+ + SCM_PROGRAM_DATA (SCM_FRAME_PROGRAM (fp))->nargs \
+ + SCM_PROGRAM_DATA (SCM_FRAME_PROGRAM (fp))->nlocs)
+#define SCM_FRAME_LOWER_ADDRESS(fp) (fp - 4)
+
+#define SCM_FRAME_BYTE_CAST(x) ((scm_t_uint8 *) SCM_UNPACK (x))
+#define SCM_FRAME_STACK_CAST(x) ((SCM *) SCM_UNPACK (x))
+
+#define SCM_FRAME_RETURN_ADDRESS(fp) \
+ (SCM_FRAME_BYTE_CAST (SCM_FRAME_DATA_ADDRESS (fp)[2]))
+#define SCM_FRAME_SET_RETURN_ADDRESS(fp, ra) \
+ ((SCM_FRAME_DATA_ADDRESS (fp)[2])) = (SCM)(ra);
+#define SCM_FRAME_MV_RETURN_ADDRESS(fp) \
+ (SCM_FRAME_BYTE_CAST (SCM_FRAME_DATA_ADDRESS (fp)[1]))
+#define SCM_FRAME_SET_MV_RETURN_ADDRESS(fp, mvra) \
+ ((SCM_FRAME_DATA_ADDRESS (fp)[1])) = (SCM)(mvra);
+#define SCM_FRAME_DYNAMIC_LINK(fp) \
+ (SCM_FRAME_STACK_CAST (SCM_FRAME_DATA_ADDRESS (fp)[0]))
+#define SCM_FRAME_SET_DYNAMIC_LINK(fp, dl) \
+ ((SCM_FRAME_DATA_ADDRESS (fp)[0])) = (SCM)(dl);
+#define SCM_FRAME_VARIABLE(fp,i) fp[i]
+#define SCM_FRAME_PROGRAM(fp) fp[-1]
+
+
+/*
+ * Heap frames
+ */
+
+SCM_API scm_t_bits scm_tc16_vm_frame;
+
+struct scm_vm_frame
+{
+ SCM stack_holder;
+ SCM *fp;
+ SCM *sp;
+ scm_t_uint8 *ip;
+ scm_t_ptrdiff offset;
+};
+
+#define SCM_VM_FRAME_P(x) SCM_SMOB_PREDICATE (scm_tc16_vm_frame, x)
+#define SCM_VM_FRAME_DATA(x) ((struct scm_vm_frame*)SCM_SMOB_DATA (x))
+#define SCM_VM_FRAME_STACK_HOLDER(f) SCM_VM_FRAME_DATA(f)->stack_holder
+#define SCM_VM_FRAME_FP(f) SCM_VM_FRAME_DATA(f)->fp
+#define SCM_VM_FRAME_SP(f) SCM_VM_FRAME_DATA(f)->sp
+#define SCM_VM_FRAME_IP(f) SCM_VM_FRAME_DATA(f)->ip
+#define SCM_VM_FRAME_OFFSET(f) SCM_VM_FRAME_DATA(f)->offset
+#define SCM_VALIDATE_VM_FRAME(p,x) SCM_MAKE_VALIDATE (p, x, VM_FRAME_P)
+
+SCM_API SCM scm_c_make_vm_frame (SCM stack_holder, SCM *fp, SCM *sp,
+ scm_t_uint8 *ip, scm_t_ptrdiff offset);
+SCM_API SCM scm_vm_frame_p (SCM obj);
+SCM_API SCM scm_vm_frame_program (SCM frame);
+SCM_API SCM scm_vm_frame_arguments (SCM frame);
+SCM_API SCM scm_vm_frame_source (SCM frame);
+SCM_API SCM scm_vm_frame_local_ref (SCM frame, SCM index);
+SCM_API SCM scm_vm_frame_local_set_x (SCM frame, SCM index, SCM val);
+SCM_API SCM scm_vm_frame_return_address (SCM frame);
+SCM_API SCM scm_vm_frame_mv_return_address (SCM frame);
+SCM_API SCM scm_vm_frame_dynamic_link (SCM frame);
+SCM_API SCM scm_vm_frame_stack (SCM frame);
+
+SCM_API SCM scm_c_vm_frame_prev (SCM frame);
+
+SCM_INTERNAL void scm_bootstrap_frames (void);
+SCM_INTERNAL void scm_init_frames (void);
+
+#endif /* _SCM_FRAMES_H_ */
+
+/*
+ Local Variables:
+ c-file-style: "gnu"
+ End:
+*/