New VM.

src/programs.c

@@ -0,0 +1,209 @@
+/* Copyright (C) 2000 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 "instructions.h"
+#include "programs.h"
+#include "vm.h"
+
+
+scm_bits_t scm_tc16_program;
+
+static SCM zero_vector;
+
+SCM
+scm_c_make_program (void *addr, size_t size, SCM holder)
+#define FUNC_NAME "scm_c_make_program"
+{
+  struct scm_program *p = SCM_MUST_MALLOC (sizeof (struct scm_program));
+  p->size     = size;
+  p->nargs    = 0;
+  p->nrest    = 0;
+  p->nlocs    = 0;
+  p->meta     = SCM_EOL;
+  p->objs     = zero_vector;
+  p->external = SCM_EOL;
+  p->holder   = holder;
+
+  /* If nobody holds bytecode's address, then allocate a new memory */
+  if (SCM_FALSEP (p->holder))
+    p->base = SCM_MUST_MALLOC (size);
+  else
+    p->base = addr;
+
+  SCM_RETURN_NEWSMOB (scm_tc16_program, p);
+}
+#undef FUNC_NAME
+
+SCM
+scm_c_make_vclosure (SCM program, SCM external)
+{
+  struct scm_program *p;
+  struct scm_program *q = SCM_PROGRAM_DATA (program);
+  SCM prog = scm_c_make_program (q->base, q->size, program);
+  p = SCM_PROGRAM_DATA (prog);
+  p->nargs    = q->nargs;
+  p->nrest    = q->nrest;
+  p->nlocs    = q->nlocs;
+  p->meta     = q->meta;
+  p->objs     = q->objs;
+  p->external = external;
+  return prog;
+}
+
+static SCM
+program_mark (SCM obj)
+{
+  struct scm_program *p = SCM_PROGRAM_DATA (obj);
+  scm_gc_mark (p->meta);
+  scm_gc_mark (p->objs);
+  scm_gc_mark (p->external);
+  return p->holder;
+}
+
+static scm_sizet
+program_free (SCM obj)
+{
+  struct scm_program *p = SCM_PROGRAM_DATA (obj);
+  scm_sizet size = (sizeof (struct scm_program));
+  if (SCM_FALSEP (p->holder))
+    {
+      size += p->size;
+      scm_must_free (p->base);
+    }
+  scm_must_free (p);
+  return size;
+}
+
+static int
+program_print (SCM obj, SCM port, scm_print_state *pstate)
+{
+  scm_puts ("#<program 0x", port);
+  scm_intprint ((long) SCM_PROGRAM_BASE (obj), 16, port);
+  scm_putc ('>', port);
+  return 1;
+}
+
+static SCM
+program_apply (SCM program, SCM args)
+{
+  return scm_vm_apply (scm_make_vm (), program, args);
+}
+
+
+/*
+ * Scheme interface
+ */
+
+SCM_DEFINE (scm_program_p, "program?", 1, 0, 0,
+	    (SCM obj),
+	    "")
+#define FUNC_NAME s_scm_program_p
+{
+  return SCM_BOOL (SCM_PROGRAM_P (obj));
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_program_arity, "program-arity", 1, 0, 0,
+	    (SCM program),
+	    "")
+#define FUNC_NAME s_scm_program_arity
+{
+  SCM_VALIDATE_PROGRAM (1, program);
+  return SCM_LIST3 (SCM_MAKINUM (SCM_PROGRAM_NARGS (program)),
+		    SCM_MAKINUM (SCM_PROGRAM_NREST (program)),
+		    SCM_MAKINUM (SCM_PROGRAM_NLOCS (program)));
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_program_objects, "program-objects", 1, 0, 0,
+	    (SCM program),
+	    "")
+#define FUNC_NAME s_scm_program_objects
+{
+  SCM_VALIDATE_PROGRAM (1, program);
+  return SCM_PROGRAM_OBJS (program);
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_program_external, "program-external", 1, 0, 0,
+	    (SCM program),
+	    "")
+#define FUNC_NAME s_scm_program_external
+{
+  SCM_VALIDATE_PROGRAM (1, program);
+  return SCM_PROGRAM_EXTERNAL (program);
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_program_bytecode, "program-bytecode", 1, 0, 0,
+	    (SCM program),
+	    "")
+#define FUNC_NAME s_scm_program_bytecode
+{
+  SCM_VALIDATE_PROGRAM (1, program);
+  return scm_makfromstr (SCM_PROGRAM_BASE (program),
+			 SCM_PROGRAM_SIZE (program), 0);
+}
+#undef FUNC_NAME
+
+
+void
+scm_init_programs (void)
+{
+  zero_vector = scm_permanent_object (scm_c_make_vector (0, SCM_BOOL_F));
+
+  scm_tc16_program = scm_make_smob_type ("program", 0);
+  scm_set_smob_mark (scm_tc16_program, program_mark);
+  scm_set_smob_free (scm_tc16_program, program_free);
+  scm_set_smob_print (scm_tc16_program, program_print);
+  scm_set_smob_apply (scm_tc16_program, program_apply, 0, 0, 1);
+
+#ifndef SCM_MAGIC_SNARFER
+#include "programs.x"
+#endif
+}
+
+/*
+  Local Variables:
+  c-file-style: "gnu"
+  End:
+*/