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;; Copyright (c) 2009 Vitaly Mayatskikh <v.mayatskih@gmail.com>
;;
;; This file is part of 0MQ.
;;
;; 0MQ is free software; you can redistribute it and/or modify it under
;; the terms of the Lesser GNU General Public License as published by
;; the Free Software Foundation; either version 3 of the License, or
;; (at your option) any later version.
;;
;; 0MQ 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
;; Lesser GNU General Public License for more details.
;;
;; You should have received a copy of the Lesser GNU General Public License
;; along with this program. If not, see <http://www.gnu.org/licenses/>.
(in-package :zeromq)
;; Stolen from CFFI. Uses custom allocator (alloc-fn) instead of foreign-alloc
(defun copy-lisp-string-octets (string alloc-fn &key (encoding cffi::*default-foreign-encoding*)
(null-terminated-p t) (start 0) end)
"Allocate a foreign string containing Lisp string STRING.
The string must be freed with FOREIGN-STRING-FREE."
(check-type string string)
(cffi::with-checked-simple-vector ((string (coerce string 'babel:unicode-string))
(start start) (end end))
(declare (type simple-string string))
(let* ((mapping (cffi::lookup-mapping cffi::*foreign-string-mappings* encoding))
(count (funcall (cffi::octet-counter mapping) string start end 0))
(length (if null-terminated-p
(+ count (cffi::null-terminator-len encoding))
count))
(ptr (funcall alloc-fn length)))
(funcall (cffi::encoder mapping) string start end ptr 0)
(when null-terminated-p
(dotimes (i (cffi::null-terminator-len encoding))
(setf (mem-ref ptr :char (+ count i)) 0)))
(values ptr length))))
(defclass msg ()
((raw :accessor msg-raw :initform nil)))
(defmethod initialize-instance :after ((inst msg) &key size data)
(let ((obj (foreign-alloc 'msg)))
(tg:finalize inst (lambda ()
(%msg-close obj)
(foreign-free obj)))
(cond (size (%msg-init-size obj size))
(data
(etypecase data
(string (copy-lisp-string-octets
data (lambda (sz)
(%msg-init-size obj sz)
(%msg-data obj))))
(array (progn
(%msg-init-size obj (length data))
(let ((ptr (%msg-data obj))
(i -1))
(map nil (lambda (x)
(setf (mem-aref ptr :uchar (incf i)) x))
data))))))
(t (msg-init obj)))
(setf (msg-raw inst) obj)))
(defclass pollitem ()
((raw :accessor pollitem-raw :initform nil)
(socket :accessor pollitem-socket :initform nil :initarg :socket)
(fd :accessor pollitem-fd :initform -1 :initarg :fd)
(events :accessor pollitem-events :initform 0 :initarg :events)
(revents :accessor pollitem-revents :initform 0)))
(defmethod initialize-instance :after ((inst pollitem) &key)
(let ((obj (foreign-alloc 'pollitem)))
(setf (pollitem-raw inst) obj)
(tg:finalize inst (lambda () (foreign-free obj)))))
(defun bind (s address)
(with-foreign-string (addr address)
(%bind s addr)))
(defun connect (s address)
(with-foreign-string (addr address)
(%connect s addr)))
(defmacro with-context ((context app-threads io-threads &optional flags) &body body)
`(let ((,context (init ,app-threads ,io-threads (or ,flags 0))))
,@body
(term ,context)))
(defmacro with-socket ((socket context type) &body body)
`(let ((,socket (socket ,context ,type)))
,@body
(close ,socket)))
(defmacro with-stopwatch (&body body)
(let ((watch (gensym)))
`(with-foreign-object (,watch :long 2)
(setq ,watch (stopwatch-start))
,@body
(stopwatch-stop ,watch))))
(defun msg-data-as-is (msg)
(%msg-data (msg-raw msg)))
(defun msg-data-as-string (msg)
(let ((data (%msg-data (msg-raw msg))))
(unless (zerop (pointer-address data))
(convert-from-foreign data :string))))
(defun msg-data-as-array (msg)
(let ((data (%msg-data (msg-raw msg))))
(unless (zerop (pointer-address data))
(let* ((len (msg-size msg))
(arr (make-array len :element-type '(unsigned-byte))))
(dotimes (i len)
(setf (aref arr i) (mem-aref data :uchar i)))
arr))))
(defun send (s msg &optional flags)
(%send s (msg-raw msg) (or flags 0)))
(defun recv (s msg &optional flags)
(%recv s (msg-raw msg) (or flags 0)))
(defun msg-init-size (msg size)
(%msg-init-size (msg-raw msg) size))
(defun msg-close (msg)
(%msg-close (msg-raw msg)))
(defun msg-size (msg)
(%msg-size (msg-raw msg)))
(defun msg-move (dst src)
(%msg-move (msg-raw dst) (msg-raw src)))
(defun msg-copy (dst src)
(%msg-copy (msg-raw dst) (msg-raw src)))
(defun setsockopt (socket option value)
(etypecase value
(string (with-foreign-string (string value)
(%setsockopt socket option string (length value))))
(integer (with-foreign-object (int :long 2)
(setf (mem-aref int :long 0) value)
(%setsockopt socket option int (foreign-type-size :long))))))
(defun poll (items)
(let ((len (length items)))
(with-foreign-object (%items 'pollitem len)
(dotimes (i len)
(let ((item (nth i items))
(%item (mem-aref %items 'pollitem i)))
(with-foreign-slots ((socket fd events revents) %item pollitem)
(setf socket (pollitem-socket item)
fd (pollitem-fd item)
events (pollitem-events item)))))
(let ((ret (%poll %items len)))
(if (> ret 0)
(loop for i below len
for revent = (foreign-slot-value (mem-aref %items 'pollitem i)
'pollitem
'revents)
collect (setf (pollitem-revents (nth i items)) revent))
(error (convert-from-foreign (%strerror *errno*) :string)))))))
(defmacro with-polls (list &body body)
`(let ,(loop for (name . polls) in list
collect `(,name
(list
,@(loop for (socket . events) in polls
collect `(make-instance 'pollitem
:socket ,socket
:events ,events)))))
,@body))
;
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