src/code/android-os.lisp

   1 ;;;; OS interface functions for SBCL under Linux
   2
   3 ;;;; This software is part of the SBCL system. See the README file for
   4 ;;;; more information.
   5 ;;;;
   6 ;;;; This software is derived from the CMU CL system, which was
   7 ;;;; written at Carnegie Mellon University and released into the
   8 ;;;; public domain. The software is in the public domain and is
   9 ;;;; provided with absolutely no warranty. See the COPYING and CREDITS
  10 ;;;; files for more information.
  11
  12 (in-package "SB!SYS")
  13
  14 ;;; Check that target machine features are set up consistently with
  15 ;;; this file.
  16 #!-android (error "missing :ANDROID feature")
  17
  18 (defun software-type ()
  19   #!+sb-doc
  20   "Return a string describing the supporting software."
  21   "Android")
  22
  23 ;;; FIXME: More duplicated logic here vrt. other oses. Abstract into
  24 ;;; uname-software-version?
  25 (defun software-version ()
  26   #!+sb-doc
  27   "Return a string describing version of the supporting software, or NIL
  28   if not available."
  29   (or *software-version*
  30       (setf *software-version*
  31             (sb!alien:with-alien
  32                 ((ptr (* char)
  33                       (sb!alien:alien-funcall
  34                        (sb!alien:extern-alien "software_version"
  35                                               (function (* sb!alien:char))))))
  36               (and (not (sb!alien:null-alien ptr))
  37                    (unwind-protect
  38                         (sb!alien:with-alien ((c-string sb!alien:c-string ptr))
  39                           c-string)
  40                      (sb!alien:free-alien ptr)))))))
  41
  42 ;;; Return user time, system time, and number of page faults.
  43 (defun get-system-info ()
  44   (multiple-value-bind
  45       (err? utime stime maxrss ixrss idrss isrss minflt majflt)
  46       (sb!unix:unix-getrusage sb!unix:rusage_self)
  47     (declare (ignore maxrss ixrss idrss isrss minflt))
  48     (unless err? ; FIXME: nonmnemonic (reversed) name for ERR?
  49       (error "Unix system call getrusage failed: ~A." (strerror utime)))
  50     (values utime stime majflt)))
  51
  52 ;;; Return the system page size.
  53 (defun get-page-size ()
  54   sb!c:*backend-page-bytes*)
  55
  56 ;;; support for CL:MACHINE-VERSION defined OAOO elsewhere
  57 (defun get-machine-version ()
  58   (or
  59    #!+(and mips little-endian)
  60    "little-endian"
  61    #!+(and mips big-endian)
  62    "big-endian"
  63    (let ((marker
  64           ;; hoping "cpu" exists and gives something useful in
  65           ;; all relevant Linuxen...
  66           ;;
  67           ;; from Lars Brinkhoff sbcl-devel 26 Jun 2003:
  68           ;;   I examined different versions of Linux/PPC at
  69           ;;   http://lxr.linux.no/ (the file that outputs
  70           ;;   /proc/cpuinfo is arch/ppc/kernel/setup.c, if
  71           ;;   you want to check), and all except 2.0.x
  72           ;;   seemed to do the same thing as far as the
  73           ;;   "cpu" field is concerned, i.e. it always
  74           ;;   starts with the (C-syntax) string "cpu\t\t: ".
  75           #!+ppc "cpu"
  76           ;; The field "model name" exists on kernel 2.4.21-rc6-ac1
  77           ;; anyway, with values e.g.
  78           ;;   "AMD Athlon(TM) XP 2000+"
  79           ;;   "Intel(R) Pentium(R) M processor 1300MHz"
  80           ;; which seem comparable to the information in the example
  81           ;; in the MACHINE-VERSION page of the ANSI spec.
  82           #!+(or x86 x86-64) "model name"
  83           #!+arm "Processor"))
  84      (when marker
  85        (with-open-file (stream "/proc/cpuinfo"
  86                                ;; Even on Linux it's an option to build
  87                                ;; kernels without /proc filesystems, so
  88                                ;; degrade gracefully.
  89                                :if-does-not-exist nil)
  90          (loop with line while (setf line (read-line stream nil))
  91                when (eql (search marker line) 0)
  92                return (string-trim " " (subseq line (1+ (position #\: line))))))))))