1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
|
;; 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 &optional (timeout -1))
(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 timeout)))
(cond
((zerop ret) nil)
((> 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)))
(t (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))
;
|
