module/system/vm/core.scm

   1 ;;; Guile VM core
   2
   3 ;; Copyright (C) 2001 Free Software Foundation, Inc.
   4
   5 ;; This program is free software; you can redistribute it and/or modify
   6 ;; it under the terms of the GNU General Public License as published by
   7 ;; the Free Software Foundation; either version 2, or (at your option)
   8 ;; any later version.
   9 ;;
  10 ;; This program is distributed in the hope that it will be useful,
  11 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 ;; GNU General Public License for more details.
  14 ;;
  15 ;; You should have received a copy of the GNU General Public License
  16 ;; along with this program; see the file COPYING.  If not, write to
  17 ;; the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18 ;; Boston, MA 02111-1307, USA.
  19
  20 ;;; Code:
  21
  22 (define-module (system vm core))
  23
  24 ;;;
  25 ;;; Core procedures
  26 ;;;
  27
  28 (dynamic-call "scm_init_vm" (dynamic-link "libguilevm.so"))
  29
  30 (module-export! (current-module)
  31                 (delq! '%module-public-interface
  32                        (hash-fold (lambda (k v d) (cons k d)) '()
  33                                   (module-obarray (current-module)))))
  34
  35 ;;;
  36 ;;; Bootcode interface
  37 ;;;
  38
  39 (export make-bootcode bootcode? bootcode-version
  40         bootcode-nlocs bootcode-nexts bootcode-bytecode)
  41
  42 (define *bootcode-cookie* (string-append "\0GBC-" (vm-version)))
  43
  44 (define (make-bootcode nlocs nexts bytes)
  45   (string-append *bootcode-cookie*
  46                  (integer->bytes nlocs)
  47                  (integer->bytes nexts)
  48                  bytes))
  49
  50 (define (bootcode? x)
  51   (and (string? x)
  52        (> (string-length x) 10)
  53        (string=? (substring x 1 4) "GBC")))
  54
  55 (define (bootcode-version x)
  56   (substring x 5 8))
  57
  58 (define (bootcode-nlocs x)
  59   (bytes->integer x 8))
  60
  61 (define (bootcode-nexts x)
  62   (bytes->integer x 9))
  63
  64 (define (bootcode-bytecode x)
  65   (substring x 10))
  66
  67 (define (integer->bytes n)
  68   (string (integer->char n)))
  69
  70 (define (bytes->integer bytes start)
  71   (char->integer (string-ref bytes start)))
  72
  73 ;;;
  74 ;;; Statistics interface
  75 ;;;
  76
  77 (export vms:time vms:clock)
  78
  79 (define (vms:time stat) (vector-ref stat 0))
  80 (define (vms:clock stat) (vector-ref stat 1))