1 ;;;; This software is part of the SBCL system. See the README file for
4 ;;;; This software is derived from the CMU CL system, which was written at
5 ;;;; Carnegie Mellon University and released into the public domain. The
6 ;;;; software is in the public domain and is provided with absolutely no
7 ;;;; warranty. See the COPYING and CREDITS files for more information.
9 (in-package :sb-concurrency-test)
11 (deftest mailbox-trivia.1
12 (values (mailboxp (make-mailbox))
17 (deftest mailbox-trivia.2
18 (let ((mbox1 (make-mailbox :name "foof"))
19 (mbox2 (make-mailbox)))
20 (values (mailbox-name mbox1)
21 (mailbox-name mbox2)))
25 (deftest mailbox-trivia.3
26 (flet ((test (initial-contents)
27 (let ((mbox (make-mailbox :initial-contents initial-contents)))
28 (list (mailbox-count mbox)
29 (mailbox-empty-p mbox)
30 (list-mailbox-messages mbox)
31 (eq (list-mailbox-messages mbox) initial-contents)))))
32 (values (test '(1 2 3))
38 (3 nil (#\1 #\2 #\3) nil)
42 (deftest mailbox-timeouts
43 (let* ((mbox (make-mailbox))
44 (writers (loop for i from 1 upto 20
48 do (send-message mbox x)
51 (readers (loop repeat 10
54 (loop while (receive-message mbox :timeout 0.1)
56 (mapc #'join-thread writers)
57 (apply #'+ (mapcar #'join-thread readers)))
60 ;;; FIXME: Several tests disabled on SunOS due to hangs.
62 ;;; The issues don't seem to have anything to do with mailboxes
63 ;;; per-se, but are rather related to our usage of signal-unsafe
64 ;;; pthread functions inside signal handlers.
65 #+(and sb-thread (not sunos))
68 ;; Dummy struct for ATOMIC-INCF to work.
70 (ref 0 :type sb-vm:word))
72 (defun receiver-distribution (n-receivers)
73 (let* ((aux (floor n-receivers 2))
74 (n-recv-msg (- n-receivers aux))
75 (n-recv-pend-msgs (floor aux 3))
76 (n-recv-msg-n-h (- aux n-recv-pend-msgs)))
81 (defun test-mailbox-producers-consumers
82 (&key n-senders n-receivers n-messages interruptor)
83 (let ((mbox (make-mailbox))
84 (counter (make-counter))
86 (+fin-token+ :finish) ; end token for receivers to stop
87 (+blksize+ 5)) ; "block size" for RECEIVE-PENDING-MESSAGES
88 (multiple-value-bind (n-recv-msg
91 ;; We have three groups of receivers, one using
92 ;; RECEIVE-MESSAGE, one RECEIVE-MESSAGE-NO-HANG, and
93 ;; another one RECEIVE-PENDING-MESSAGES.
94 (receiver-distribution n-receivers)
96 (make-threads n-senders "SENDER"
98 (dotimes (i n-messages t)
100 (sleep (random +sleep+))))))
102 (flet ((process-msg (msg out)
104 ((eq msg +fin-token+)
106 ((not (< -1 msg n-messages))
109 (sb-ext:atomic-incf (counter-ref counter))))))
111 (make-threads n-recv-msg "RECV-MSG"
113 (sleep (random +sleep+))
114 (loop (process-msg (receive-message mbox)
115 #'(lambda (x) (return x))))))
116 (make-threads n-recv-pend-msgs "RECV-PEND-MSGS"
119 (sleep (random +sleep+))
120 (mapc #'(lambda (msg)
121 (process-msg msg #'(lambda (x) (return x))))
122 (receive-pending-messages mbox +blksize+)))))
123 (make-threads n-recv-msg-n-h "RECV-MSG-NO-HANG"
126 (sleep (random +sleep+))
127 (multiple-value-bind (msg ok)
128 (receive-message-no-hang mbox)
130 (process-msg msg #'(lambda (x)
131 (return x))))))))))))
134 (funcall interruptor (append receivers senders)))
138 (flet ((wait-for (threads)
139 (mapc #'(lambda (thread)
140 (ecase (timed-join-thread thread)
142 ((nil) (incf garbage))
143 ((:aborted) (incf errors))
144 ((:timeout) (incf timeouts)
145 (kill-thread thread))))
147 ;; First wait until all messages are propagating.
149 ;; Senders are finished, inform and wait for the
151 (loop repeat (+ n-recv-msg
153 (* n-recv-pend-msgs +blksize+))
154 ;; The number computed above is an upper bound; if
155 ;; we send as many FINs as that, we can be sure that
156 ;; every receiver must have got at least one FIN.
157 do (send-message mbox +fin-token+))
159 ;; We may in fact have sent too many FINs, so make sure
160 ;; it's only FINs in the mailbox now.
161 (mapc #'(lambda (msg) (unless (eq msg +fin-token+)
163 (list-mailbox-messages mbox))
164 (values `(:received . ,(counter-ref counter))
165 `(:garbage . ,garbage)
167 `(:timeouts . ,timeouts))))))))
170 (deftest mailbox.single-producer-single-consumer
171 (test-mailbox-producers-consumers :n-senders 1
180 (deftest mailbox.single-producer-multiple-consumers
181 (test-mailbox-producers-consumers :n-senders 1
190 (deftest mailbox.multiple-producers-single-consumer
191 (test-mailbox-producers-consumers :n-senders 10
200 (deftest mailbox.multiple-producers-multiple-consumers
201 (test-mailbox-producers-consumers :n-senders 50
209 (deftest mailbox.interrupts-safety.1
210 (multiple-value-bind (received garbage errors timeouts)
211 (test-mailbox-producers-consumers
215 :interruptor #'(lambda (threads &aux (n (length threads)))
216 ;; 99 so even in the unlikely case that only
217 ;; receivers (or only senders) are shot
218 ;; dead, there's still one that survives to
219 ;; properly end the test.
221 for victim = (nth (random n) threads)
222 do (kill-thread victim)
223 (sleep (random 0.0001)))))
225 ;; We may have killed a receiver before it got to incrementing
227 (if (<= (cdr received) 1000000)
231 ;; we may have gotten errors due to our killing spree.
237 ) ; #+sb-thread (progn ...