source: branches/home/psmith/restructure/src/utils/utils.lisp

#|
Copyright (c) 2007
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|#

(in-package :nio-utils)

(declaim (optimize (debug 3) (speed 3) (space 0)))

(defun get-readable (format-string &optional (time (get-universal-time)))
  (multiple-value-bind (second minute hour date month year) (decode-universal-time time)
    (with-output-to-string (out)
      (format out format-string year month date hour minute second))))

(defun get-readable-time ( &optional (time (get-universal-time)))
  (get-readable "~A/~2,'0d/~2,'0d ~2,'0d:~2,'0d:~2,'0d" time))


;;High res timer

(let ((internal-base (get-internal-real-time))
      (universal-base (get-universal-time)))
;
; Gets the time including milliseconds by using a base time from universal time and 
; tracking high res passing of time using the get-internal-real-time
; Probably not that accurate in absolute terms i.e. may drift from the base, 
; but good enough for performance timings
;
  (defun get-universal-high-res()
    (let ((current-internal (get-internal-real-time)))
      (+ universal-base (/ (- current-internal internal-base) internal-time-units-per-second) )))

  (defun get-readable-high-res-time()
    (let ((estimated-universal-float (get-universal-high-res)))
      (multiple-value-bind (estimated-universal estimated-universal-rem) (floor estimated-universal-float)
        (format nil "~A.~3,'0d"(get-readable-time estimated-universal) (* 1000 estimated-universal-rem)))))
  
  )

(defparameter *format-mutex* (nio-compat:make-mutex "format lock"))

;Format the message to destination but prepend a high res time to the message, useful for logging
(defmacro format-log (destination control-string &rest format-arguments)
  `(nio-compat:with-mutex (*format-mutex*)
     (format ,destination (concatenate 'string "~A - " ,control-string) (get-readable-high-res-time) ,@format-arguments)))