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index-vector.lisp
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index-vector.lisp
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(in-package :graph-db)
(defstruct
(index-vector
(:print-function
(lambda (i s d)
(declare (ignore d))
(let ((*print-base* 10))
(format s "#<INDEX-VECTOR~% :ADRESS ~S~% :SIZE ~S~% :VECTOR ~S>"
(index-vector-address i)
(index-vector-size i)
(map 'list
#'string-id
(index-vector-vector i))))))
(:constructor %make-index-vector))
(address 0 :type (unsigned-byte 64))
(size 0 :type integer)
(vector #() :type (array (simple-array (unsigned-byte 8) (16))))
heap)
(defun make-index-vector (heap key-vector)
(let* ((total-size (+ 8 (* 16 (length key-vector))))
(address (allocate heap total-size))
(index-vector (%make-index-vector :address address
:heap heap
:size (length key-vector)
:vector key-vector)))
(serialize-uint64 (memory-mmap heap) (index-vector-size index-vector) address)
(incf address 7)
(dotimes (i (index-vector-size index-vector))
(dotimes (j 16)
(set-byte (memory-mmap heap) (incf address) (aref (aref key-vector i) j))))
(if *graph*
(setf (gethash (index-vector-address index-vector)
(index-vector-cache *graph*)) index-vector)
index-vector)))
(defun get-index-vector (heap address)
(or (and *graph* *cache-enabled* (gethash address (index-vector-cache *graph*)))
(let* ((size (deserialize-uint64 (memory-mmap heap) address))
(index-vector
(%make-index-vector
:address address
:heap heap
:size size
:vector (make-array size
:element-type
'(simple-array (unsigned-byte 8) (16))))))
(incf address 7)
(dotimes (i size)
(let ((key (get-buffer 16)))
(dotimes (j 16)
(setf (aref key j) (get-byte (memory-mmap heap) (incf address))))
(setf (aref (index-vector-vector index-vector) i) key)))
(if *graph*
(setf (gethash (index-vector-address index-vector)
(index-vector-cache *graph*)) index-vector)
index-vector))))
(defun index-vector-push-extend (index-vector key &key free-old-p)
(let* ((heap (index-vector-heap index-vector))
(new-size (1+ (index-vector-size index-vector)))
(total-size (+ 8 (* 16 new-size)))
(old-address (index-vector-address index-vector))
(new-address (allocate heap total-size))
(current-address new-address)
(key-vector (make-array new-size
:initial-element +null-key+
:element-type
'(simple-array (unsigned-byte 8) (16)))))
(serialize-uint64 (memory-mmap heap) new-size current-address)
(incf current-address 7)
(dotimes (i (index-vector-size index-vector))
(setf (aref key-vector i) (aref (index-vector-vector index-vector) i))
(dotimes (j 16)
(set-byte (memory-mmap heap)
(incf current-address)
(aref (aref key-vector i) j))))
;; Add new key
(setf (aref key-vector (1- new-size)) key)
(dotimes (j 16)
(set-byte (memory-mmap heap)
(incf current-address)
(aref key j)))
(setf (index-vector-address index-vector)
new-address
(index-vector-vector index-vector)
key-vector
(index-vector-size index-vector)
new-size)
(when free-old-p
(free heap old-address))
;;(when *graph*
;; (setf (gethash (index-vector-address index-vector) (index-vector-cache *graph*))
;; index-vector))
(values index-vector old-address)))
(defun index-vector-remove (index-vector key &key free-old-p)
(let* ((heap (index-vector-heap index-vector))
(key-vector (remove key (index-vector-vector index-vector) :test 'equalp))
(new-size (length key-vector))
(total-size (+ 8 (* 16 new-size)))
(old-address (index-vector-address index-vector))
(new-address (allocate heap total-size))
(current-address new-address))
(serialize-uint64 (memory-mmap heap) new-size current-address)
(incf current-address 7)
(dotimes (i new-size)
(dotimes (j 16)
(set-byte (memory-mmap heap)
(incf current-address)
(aref (aref key-vector i) j))))
(setf (index-vector-address index-vector)
new-address
(index-vector-vector index-vector)
key-vector
(index-vector-size index-vector)
new-size)
(when free-old-p
(free heap old-address))
;;(when *graph*
;; (setf (gethash (index-vector-address index-vector) (index-vector-cache *graph*))
;; index-vector))
(values index-vector old-address)))
(defclass index-vector-cursor (cursor)
((node :initarg :node :accessor index-vector-cursor-node)
(index :initarg :index :accessor index :initform 0)
(index-vector :initarg :index-vector :accessor index-vector)
(key-fn :initarg :key-fn :accessor key-fn)
(value-fn :initarg :value-fn :accessor value-fn)
(lookup-fn :initarg :lookup-fn :accessor lookup-fn)))
(defmethod make-cursor ((index-vector index-vector) &key
(cursor-class 'index-vector-cursor)
key-fn value-fn lookup-fn)
(make-instance cursor-class
:index-vector index-vector
:node (aref (index-vector-vector index-vector) 0)
:index 0
:lookup-fn lookup-fn
:key-fn key-fn
:value-fn value-fn))
(defmethod cursor-next ((cursor index-vector-cursor) &optional eoc)
(with-slots (node index index-vector) cursor
(if node
(let ((result node))
(incf index)
(setq node (funcall (lookup-fn cursor)
(aref (index-vector-vector index-vector) index)))
result)
eoc)))
(defclass index-vector-value-cursor (index-vector-cursor)
())
(defmethod make-values-cursor ((index-vector index-vector) &key
key-fn value-fn lookup-fn)
(make-cursor index-vector
:cursor-class 'index-vector-value-cursor
:lookup-fn lookup-fn
:key-fn key-fn
:value-fn value-fn))
(defmethod cursor-next :around ((cursor index-vector-value-cursor) &optional eoc)
(let ((result (call-next-method)))
(if (eql result eoc)
eoc
(funcall (value-fn cursor) result))))
(defclass index-vector-key-cursor (index-vector-cursor)
())
(defmethod make-keys-cursor ((index-vector index-vector) &key
key-fn value-fn lookup-fn)
(make-cursor index-vector
:cursor-class 'index-vector-key-cursor
:lookup-fn lookup-fn
:key-fn key-fn
:value-fn value-fn))
(defmethod cursor-next :around ((cursor index-vector-key-cursor) &optional eoc)
(let ((result (call-next-method)))
(if (eql result eoc)
eoc
(funcall (key-fn cursor) result))))
(defmethod map-index-vector (fun (index-vector index-vector) &key lookup-fn key-fn value-fn)
(let ((cursor (make-cursor index-vector
:lookup-fn lookup-fn
:key-fn key-fn
:value-fn value-fn)))
(do ((val (cursor-next cursor)
(cursor-next cursor)))
((null val))
(apply fun val))))