1 #define _XOPEN_SOURCE 600
2 #ifdef HAVE_SYS_SELECT_H
3 # include <sys/select.h>
21 #if defined(__linux__)
22 # define MQD_TO_FD(mqd) (int)(mqd)
23 #elif defined(HAVE___MQ_OSHANDLE) /* FreeBSD */
24 # define MQD_TO_FD(mqd) __mq_oshandle(mqd)
26 # warning mqd_t is not select()-able on your OS
27 # define MQ_IO_MARK(mq) ((void)(0))
28 # define MQ_IO_SET(mq,val) ((void)(0))
32 # define MQ_IO_MARK(mq) rb_gc_mark((mq)->io)
33 # define MQ_IO_SET(mq,val) do { (mq)->io = (val); } while (0)
46 static VALUE cPOSIX_MQ
, cAttr
;
47 static ID id_new
, id_kill
, id_fileno
;
48 static ID sym_r
, sym_w
, sym_rw
;
49 static const mqd_t MQD_INVALID
= (mqd_t
)-1;
51 /* Ruby 1.8.6+ macros (for compatibility with Ruby 1.9) */
53 # define RSTRING_PTR(s) (RSTRING(s)->ptr)
56 # define RSTRING_LEN(s) (RSTRING(s)->len)
59 # define RSTRUCT_PTR(s) (RSTRUCT(s)->ptr)
62 # define RSTRUCT_LEN(s) (RSTRUCT(s)->len)
65 #ifndef HAVE_RB_STR_SET_LEN
67 # define rb_str_set_len(str,len) rb_str_resize(str,len)
68 # else /* 1.8.6 optimized version */
69 /* this is taken from Ruby 1.8.7, 1.8.6 may not have it */
70 static void rb_18_str_set_len(VALUE str
, long len
)
72 RSTRING(str
)->len
= len
;
73 RSTRING(str
)->ptr
[len
] = '\0';
75 # define rb_str_set_len(str,len) rb_18_str_set_len(str,len)
76 # endif /* ! RUBINIUS */
77 #endif /* !defined(HAVE_RB_STR_SET_LEN) */
79 #ifndef HAVE_RB_STRUCT_ALLOC_NOINIT
80 static VALUE
rb_struct_alloc_noinit(VALUE
class)
82 return rb_funcall(class, id_new
, 0, 0);
84 #endif /* !defined(HAVE_RB_STRUCT_ALLOC_NOINIT) */
86 /* partial emulation of the 1.9 rb_thread_blocking_region under 1.8 */
87 #ifndef HAVE_RB_THREAD_BLOCKING_REGION
89 # define RUBY_UBF_IO ((rb_unblock_function_t *)-1)
90 typedef void rb_unblock_function_t(void *);
91 typedef VALUE
rb_blocking_function_t(void *);
93 rb_thread_blocking_region(
94 rb_blocking_function_t
*func
, void *data1
,
95 rb_unblock_function_t
*ubf
, void *data2
)
99 assert(RUBY_UBF_IO
== ubf
&& "RUBY_UBF_IO required for emulation");
107 #endif /* ! HAVE_RB_THREAD_BLOCKING_REGION */
109 /* used to pass arguments to mq_open inside blocking region */
118 /* used to pass arguments to mq_send/mq_receive inside blocking region */
124 struct timespec
*timeout
;
127 /* hope it's there..., TODO: a better version that works in rbx */
128 struct timeval
rb_time_interval(VALUE
);
130 static struct timespec
*convert_timeout(struct timespec
*dest
, VALUE time
)
132 struct timeval tv
, now
;
137 tv
= rb_time_interval(time
); /* aggregate return :( */
138 gettimeofday(&now
, NULL
);
139 dest
->tv_sec
= now
.tv_sec
+ tv
.tv_sec
;
140 dest
->tv_nsec
= (now
.tv_usec
+ tv
.tv_usec
) * 1000;
142 if (dest
->tv_nsec
> 1000000000) {
143 dest
->tv_nsec
-= 1000000000;
150 /* (may) run without GVL */
151 static VALUE
xopen(void *ptr
)
153 struct open_args
*x
= ptr
;
157 case 2: rv
= mq_open(x
->name
, x
->oflags
); break;
158 case 3: rv
= mq_open(x
->name
, x
->oflags
, x
->mode
, NULL
); break;
159 case 4: rv
= mq_open(x
->name
, x
->oflags
, x
->mode
, &x
->attr
); break;
160 default: rv
= MQD_INVALID
;
166 /* runs without GVL */
167 static VALUE
xsend(void *ptr
)
169 struct rw_args
*x
= ptr
;
172 return (VALUE
)mq_timedsend(x
->des
, x
->msg_ptr
, x
->msg_len
,
173 x
->msg_prio
, x
->timeout
);
175 return (VALUE
)mq_send(x
->des
, x
->msg_ptr
, x
->msg_len
, x
->msg_prio
);
178 /* runs without GVL */
179 static VALUE
xrecv(void *ptr
)
181 struct rw_args
*x
= ptr
;
184 return (VALUE
)mq_timedreceive(x
->des
, x
->msg_ptr
, x
->msg_len
,
185 &x
->msg_prio
, x
->timeout
);
187 return (VALUE
)mq_receive(x
->des
, x
->msg_ptr
, x
->msg_len
, &x
->msg_prio
);
191 static void mark(void *ptr
)
193 struct posix_mq
*mq
= ptr
;
195 rb_gc_mark(mq
->name
);
196 rb_gc_mark(mq
->thread
);
201 static void _free(void *ptr
)
203 struct posix_mq
*mq
= ptr
;
205 if (mq
->des
!= MQD_INVALID
) {
206 /* we ignore errors when gc-ing */
207 int saved_errno
= errno
;
215 /* automatically called at creation (before initialize) */
216 static VALUE
alloc(VALUE klass
)
219 VALUE rv
= Data_Make_Struct(klass
, struct posix_mq
, mark
, _free
, mq
);
221 mq
->des
= MQD_INVALID
;
222 mq
->attr
.mq_flags
= 0;
223 mq
->attr
.mq_maxmsg
= 0;
224 mq
->attr
.mq_msgsize
= -1;
225 mq
->attr
.mq_curmsgs
= 0;
233 /* unwraps the posix_mq struct from self */
234 static struct posix_mq
*get(VALUE self
, int need_valid
)
238 Data_Get_Struct(self
, struct posix_mq
, mq
);
240 if (need_valid
&& mq
->des
== MQD_INVALID
)
241 rb_raise(rb_eIOError
, "closed queue descriptor");
246 /* converts the POSIX_MQ::Attr astruct into a struct mq_attr attr */
247 static void attr_from_struct(struct mq_attr
*attr
, VALUE astruct
, int all
)
251 if (CLASS_OF(astruct
) != cAttr
)
252 rb_raise(rb_eArgError
, "not a POSIX_MQ::Attr: %s",
253 RSTRING_PTR(rb_inspect(astruct
)));
255 ptr
= RSTRUCT_PTR(astruct
);
257 attr
->mq_flags
= NUM2LONG(ptr
[0]);
259 if (all
|| !NIL_P(ptr
[1]))
260 attr
->mq_maxmsg
= NUM2LONG(ptr
[1]);
261 if (all
|| !NIL_P(ptr
[2]))
262 attr
->mq_msgsize
= NUM2LONG(ptr
[2]);
264 attr
->mq_curmsgs
= NUM2LONG(ptr
[3]);
269 * POSIX_MQ.new(name [, flags [, mode [, mq_attr]]) => mq
271 * Opens a POSIX message queue given by +name+. +name+ should start
272 * with a slash ("/") for portable applications.
274 * If a Symbol is given in place of integer +flags+, then:
276 * * +:r+ is equivalent to IO::RDONLY
277 * * +:w+ is equivalent to IO::CREAT|IO::WRONLY
278 * * +:rw+ is equivalent to IO::CREAT|IO::RDWR
280 * +mode+ is an integer and only used when IO::CREAT is used.
281 * +mq_attr+ is a POSIX_MQ::Attr and only used if IO::CREAT is used.
282 * If +mq_attr+ is not specified when creating a queue, then the
283 * system defaults will be used.
285 * See the manpage for mq_open(3) for more details on this function.
287 static VALUE
init(int argc
, VALUE
*argv
, VALUE self
)
289 struct posix_mq
*mq
= get(self
, 0);
291 VALUE name
, oflags
, mode
, attr
;
293 rb_scan_args(argc
, argv
, "13", &name
, &oflags
, &mode
, &attr
);
295 if (TYPE(name
) != T_STRING
)
296 rb_raise(rb_eArgError
, "name must be a string");
298 switch (TYPE(oflags
)) {
305 else if (oflags
== sym_w
)
306 x
.oflags
= O_CREAT
|O_WRONLY
;
307 else if (oflags
== sym_rw
)
308 x
.oflags
= O_CREAT
|O_RDWR
;
310 rb_raise(rb_eArgError
,
311 "symbol must be :r, :w, or :rw: %s",
312 RSTRING_PTR(rb_inspect(oflags
)));
316 x
.oflags
= NUM2INT(oflags
);
319 rb_raise(rb_eArgError
, "flags must be an int, :r, :w, or :wr");
322 x
.name
= RSTRING_PTR(name
);
325 switch (TYPE(mode
)) {
328 x
.mode
= NUM2UINT(mode
);
331 if (x
.oflags
& O_CREAT
) {
337 rb_raise(rb_eArgError
, "mode not an integer");
340 switch (TYPE(attr
)) {
343 attr_from_struct(&x
.attr
, attr
, 1);
345 /* principle of least surprise */
346 if (x
.attr
.mq_flags
& O_NONBLOCK
)
347 x
.oflags
|= O_NONBLOCK
;
352 rb_raise(rb_eArgError
, "attr must be a POSIX_MQ::Attr: %s",
353 RSTRING_PTR(rb_inspect(attr
)));
356 mq
->des
= (mqd_t
)xopen(&x
);
357 if (mq
->des
== MQD_INVALID
)
358 rb_sys_fail("mq_open");
360 mq
->name
= rb_str_dup(name
);
361 if (x
.oflags
& O_NONBLOCK
)
362 mq
->attr
.mq_flags
= O_NONBLOCK
;
369 * POSIX_MQ.unlink(name) => 1
371 * Unlinks the message queue given by +name+. The queue will be destroyed
372 * when the last process with the queue open closes its queue descriptors.
374 static VALUE
s_unlink(VALUE self
, VALUE name
)
378 if (TYPE(name
) != T_STRING
)
379 rb_raise(rb_eArgError
, "argument must be a string");
381 rv
= mq_unlink(RSTRING_PTR(name
));
382 if (rv
== MQD_INVALID
)
383 rb_sys_fail("mq_unlink");
392 * Unlinks the message queue to prevent other processes from accessing it.
393 * All existing queue descriptors to this queue including those opened by
394 * other processes are unaffected. The queue will only be destroyed
395 * when the last process with open descriptors to this queue closes
398 static VALUE
_unlink(VALUE self
)
400 struct posix_mq
*mq
= get(self
, 0);
403 assert(TYPE(mq
->name
) == T_STRING
&& "mq->name is not a string");
405 rv
= mq_unlink(RSTRING_PTR(mq
->name
));
406 if (rv
== MQD_INVALID
)
407 rb_sys_fail("mq_unlink");
412 static void setup_send_buffer(struct rw_args
*x
, VALUE buffer
)
414 buffer
= rb_obj_as_string(buffer
);
415 x
->msg_ptr
= RSTRING_PTR(buffer
);
416 x
->msg_len
= (size_t)RSTRING_LEN(buffer
);
421 * mq.send(string [,priority[, timeout]]) => nil
423 * Inserts the given +string+ into the message queue with an optional,
424 * unsigned integer +priority+. If the optional +timeout+ is specified,
425 * then Errno::ETIMEDOUT will be raised if the operation cannot complete
426 * before +timeout+ seconds has elapsed. Without +timeout+, this method
427 * may block until the queue is writable.
429 static VALUE
_send(int argc
, VALUE
*argv
, VALUE self
)
431 struct posix_mq
*mq
= get(self
, 1);
433 VALUE buffer
, prio
, timeout
;
435 struct timespec expire
;
437 rb_scan_args(argc
, argv
, "12", &buffer
, &prio
, &timeout
);
439 setup_send_buffer(&x
, buffer
);
441 x
.timeout
= convert_timeout(&expire
, timeout
);
442 x
.msg_prio
= NIL_P(prio
) ? 0 : NUM2UINT(prio
);
444 if (mq
->attr
.mq_flags
& O_NONBLOCK
)
445 rv
= (mqd_t
)xsend(&x
);
447 rv
= (mqd_t
)rb_thread_blocking_region(xsend
, &x
,
449 if (rv
== MQD_INVALID
)
450 rb_sys_fail("mq_send");
459 * Inserts the given +string+ into the message queue with a
460 * default priority of 0 and no timeout.
462 static VALUE
send0(VALUE self
, VALUE buffer
)
464 struct posix_mq
*mq
= get(self
, 1);
468 setup_send_buffer(&x
, buffer
);
473 rv
= (mqd_t
)rb_thread_blocking_region(xsend
, &x
, RUBY_UBF_IO
, 0);
474 if (rv
== MQD_INVALID
)
475 rb_sys_fail("mq_send");
485 * Returns an IO.select-able +IO+ object. This method is only available
486 * under Linux and is not intended to be portable.
488 static VALUE
to_io(VALUE self
)
490 struct posix_mq
*mq
= get(self
, 1);
491 int fd
= MQD_TO_FD(mq
->des
);
494 mq
->io
= rb_funcall(rb_cIO
, id_new
, 1, INT2NUM(fd
));
500 static VALUE
_receive(int wantarray
, int argc
, VALUE
*argv
, VALUE self
);
504 * mq.receive([buffer, [timeout]]) => [ message, priority ]
506 * Takes the highest priority message off the queue and returns
507 * an array containing the message as a String and the Integer
508 * priority of the message.
510 * If the optional +buffer+ is present, then it must be a String
511 * which will receive the data.
513 * If the optional +timeout+ is present, then it may be a Float
514 * or Integer specifying the timeout in seconds. Errno::ETIMEDOUT
515 * will be raised if +timeout+ has elapsed and there are no messages
518 static VALUE
receive(int argc
, VALUE
*argv
, VALUE self
)
520 return _receive(1, argc
, argv
, self
);
525 * mq.shift([buffer, [timeout]]) => message
527 * Takes the highest priority message off the queue and returns
528 * the message as a String.
530 * If the optional +buffer+ is present, then it must be a String
531 * which will receive the data.
533 * If the optional +timeout+ is present, then it may be a Float
534 * or Integer specifying the timeout in seconds. Errno::ETIMEDOUT
535 * will be raised if +timeout+ has elapsed and there are no messages
538 static VALUE
shift(int argc
, VALUE
*argv
, VALUE self
)
540 return _receive(0, argc
, argv
, self
);
543 static VALUE
_receive(int wantarray
, int argc
, VALUE
*argv
, VALUE self
)
545 struct posix_mq
*mq
= get(self
, 1);
547 VALUE buffer
, timeout
;
549 struct timespec expire
;
551 if (mq
->attr
.mq_msgsize
< 0) {
552 if (mq_getattr(mq
->des
, &mq
->attr
) < 0)
553 rb_sys_fail("mq_getattr");
556 rb_scan_args(argc
, argv
, "02", &buffer
, &timeout
);
557 x
.timeout
= convert_timeout(&expire
, timeout
);
560 buffer
= rb_str_new(0, mq
->attr
.mq_msgsize
);
563 rb_str_modify(buffer
);
564 rb_str_resize(buffer
, mq
->attr
.mq_msgsize
);
567 x
.msg_ptr
= RSTRING_PTR(buffer
);
568 x
.msg_len
= (size_t)mq
->attr
.mq_msgsize
;
571 if (mq
->attr
.mq_flags
& O_NONBLOCK
) {
572 r
= (ssize_t
)xrecv(&x
);
574 r
= (ssize_t
)rb_thread_blocking_region(xrecv
, &x
,
578 rb_sys_fail("mq_receive");
580 rb_str_set_len(buffer
, r
);
583 return rb_ary_new3(2, buffer
, UINT2NUM(x
.msg_prio
));
591 * Returns a POSIX_MQ::Attr struct containing the attributes
592 * of the message queue. See the mq_getattr(3) manpage for
595 static VALUE
getattr(VALUE self
)
597 struct posix_mq
*mq
= get(self
, 1);
601 if (mq_getattr(mq
->des
, &mq
->attr
) < 0)
602 rb_sys_fail("mq_getattr");
604 astruct
= rb_struct_alloc_noinit(cAttr
);
605 ptr
= RSTRUCT_PTR(astruct
);
606 ptr
[0] = LONG2NUM(mq
->attr
.mq_flags
);
607 ptr
[1] = LONG2NUM(mq
->attr
.mq_maxmsg
);
608 ptr
[2] = LONG2NUM(mq
->attr
.mq_msgsize
);
609 ptr
[3] = LONG2NUM(mq
->attr
.mq_curmsgs
);
616 * mq.attr = POSIX_MQ::Attr(IO::NONBLOCK) => mq_attr
618 * Only the IO::NONBLOCK flag may be set or unset (zero) in this manner.
619 * See the mq_setattr(3) manpage for more details.
621 * Consider using the POSIX_MQ#nonblock= method as it is easier and
622 * more natural to use.
624 static VALUE
setattr(VALUE self
, VALUE astruct
)
626 struct posix_mq
*mq
= get(self
, 1);
627 struct mq_attr newattr
;
629 attr_from_struct(&newattr
, astruct
, 0);
631 if (mq_setattr(mq
->des
, &newattr
, NULL
) < 0)
632 rb_sys_fail("mq_setattr");
641 * Closes the underlying message queue descriptor.
642 * If this descriptor had a registered notification request, the request
643 * will be removed so another descriptor or process may register a
644 * notification request. Message queue descriptors are automatically
645 * closed by garbage collection.
647 static VALUE
_close(VALUE self
)
649 struct posix_mq
*mq
= get(self
, 1);
651 if (mq_close(mq
->des
) < 0)
652 rb_sys_fail("mq_close");
654 mq
->des
= MQD_INVALID
;
662 * mq.closed? => true or false
664 * Returns +true+ if the message queue descriptor is closed and therefore
665 * unusable, otherwise +false+
667 static VALUE
closed(VALUE self
)
669 struct posix_mq
*mq
= get(self
, 0);
671 return mq
->des
== MQD_INVALID
? Qtrue
: Qfalse
;
678 * Returns the string name of message queue associated with +mq+
680 static VALUE
name(VALUE self
)
682 struct posix_mq
*mq
= get(self
, 0);
687 static int lookup_sig(VALUE sig
)
693 sig
= rb_obj_as_string(sig
);
694 len
= RSTRING_LEN(sig
);
695 ptr
= RSTRING_PTR(sig
);
697 if (len
> 3 && !memcmp("SIG", ptr
, 3))
698 sig
= rb_str_new(ptr
+ 3, len
- 3);
701 VALUE mSignal
= rb_define_module("Signal"""); /* avoid RDoc */
703 list
= rb_funcall(mSignal
, rb_intern("list"), 0, 0);
704 rb_global_variable(&list
);
707 sig
= rb_hash_aref(list
, sig
);
709 rb_raise(rb_eArgError
, "invalid signal: %s\n",
710 RSTRING_PTR(rb_inspect(sig
)));
715 /* we spawn a thread just to write ONE byte into an fd (usually a pipe) */
716 static void thread_notify_fd(union sigval sv
)
718 int fd
= sv
.sival_int
;
720 while ((write(fd
, "", 1) < 0) && (errno
== EINTR
|| errno
== EAGAIN
));
723 static void setup_notify_io(struct sigevent
*not, VALUE io
)
725 VALUE fileno
= rb_funcall(io
, id_fileno
, 0, 0);
726 int fd
= NUM2INT(fileno
);
730 if ((e
= pthread_attr_init(&attr
)))
732 if ((e
= pthread_attr_setdetachstate(&attr
, PTHREAD_CREATE_DETACHED
)))
734 #ifdef PTHREAD_STACK_MIN
735 (void)pthread_attr_setstacksize(&attr
, PTHREAD_STACK_MIN
);
737 # warning PTHREAD_STACK_MIN not available,
739 not->sigev_notify
= SIGEV_THREAD
;
740 not->sigev_notify_function
= thread_notify_fd
;
741 not->sigev_notify_attributes
= &attr
;
742 not->sigev_value
.sival_int
= fd
;
745 rb_raise(rb_eRuntimeError
, "pthread failure: %s\n", strerror(e
));
750 * mq.notify = signal => signal
752 * Registers the notification request to deliver a given +signal+
753 * to the current process when message is received.
754 * If +signal+ is +nil+, it will unregister and disable the notification
755 * request to allow other processes to register a request.
756 * If +signal+ is +false+, it will register a no-op notification request
757 * which will prevent other processes from registering a notification.
758 * If +signal+ is an +IO+ object, it will spawn a thread upon the
759 * arrival of the next message and write one "\\0" byte to the file
760 * descriptor belonging to that IO object.
761 * Only one process may have a notification request for a queue
762 * at a time, Errno::EBUSY will be raised if there is already
763 * a notification request registration for the queue.
765 * Notifications are only fired once and processes must reregister
766 * for subsequent notifications.
768 * For readers of the mq_notify(3) manpage, passing +false+
769 * is equivalent to SIGEV_NONE, and passing +nil+ is equivalent
770 * of passing a NULL notification pointer to mq_notify(3).
772 static VALUE
setnotify(VALUE self
, VALUE arg
)
774 struct posix_mq
*mq
= get(self
, 1);
776 struct sigevent
* notification
= ¬
779 if (!NIL_P(mq
->thread
)) {
780 rb_funcall(mq
->thread
, id_kill
, 0, 0);
783 not.sigev_notify
= SIGEV_SIGNAL
;
787 not.sigev_notify
= SIGEV_NONE
;
793 not.sigev_signo
= NUM2INT(arg
);
797 not.sigev_signo
= lookup_sig(arg
);
798 rv
= INT2NUM(not.sigev_signo
);
801 setup_notify_io(¬, arg
);
804 /* maybe support Proc+thread via sigev_notify_function.. */
805 rb_raise(rb_eArgError
, "must be a signal or nil");
808 if (mq_notify(mq
->des
, notification
) < 0)
809 rb_sys_fail("mq_notify");
816 * mq.nonblock? => true or false
818 * Returns the current non-blocking state of the message queue descriptor.
820 static VALUE
getnonblock(VALUE self
)
822 struct posix_mq
*mq
= get(self
, 1);
824 return mq
->attr
.mq_flags
& O_NONBLOCK
? Qtrue
: Qfalse
;
829 * mq.nonblock = boolean => boolean
831 * Enables or disables non-blocking operation for the message queue
832 * descriptor. Errno::EAGAIN will be raised in situations where
833 * the queue would block. This is not compatible with +timeout+
834 * arguments to POSIX_MQ#send and POSIX_MQ#receive.
836 static VALUE
setnonblock(VALUE self
, VALUE nb
)
838 struct mq_attr newattr
;
839 struct posix_mq
*mq
= get(self
, 1);
842 newattr
.mq_flags
= O_NONBLOCK
;
843 else if (nb
== Qfalse
)
844 newattr
.mq_flags
= 0;
846 rb_raise(rb_eArgError
, "must be true or false");
848 if (mq_setattr(mq
->des
, &newattr
, &mq
->attr
) < 0)
849 rb_sys_fail("mq_setattr");
851 mq
->attr
.mq_flags
= newattr
.mq_flags
;
857 static VALUE
setnotifythread(VALUE self
, VALUE thread
)
859 struct posix_mq
*mq
= get(self
, 1);
865 void Init_posix_mq_ext(void)
867 cPOSIX_MQ
= rb_define_class("POSIX_MQ", rb_cObject
);
868 rb_define_alloc_func(cPOSIX_MQ
, alloc
);
869 cAttr
= rb_const_get(cPOSIX_MQ
, rb_intern("Attr"));
872 * The maximum number of open message descriptors supported
873 * by the system. This may be -1, in which case it is dynamically
874 * set at runtime. Consult your operating system documentation
875 * for system-specific information about this.
877 rb_define_const(cPOSIX_MQ
, "OPEN_MAX",
878 LONG2NUM(sysconf(_SC_MQ_OPEN_MAX
)));
881 * The maximum priority that may be specified for POSIX_MQ#send
882 * On POSIX-compliant systems, this is at least 31, but some
883 * systems allow higher limits.
884 * The minimum priority is always zero.
886 rb_define_const(cPOSIX_MQ
, "PRIO_MAX",
887 LONG2NUM(sysconf(_SC_MQ_PRIO_MAX
)));
889 rb_define_singleton_method(cPOSIX_MQ
, "unlink", s_unlink
, 1);
891 rb_define_method(cPOSIX_MQ
, "initialize", init
, -1);
892 rb_define_method(cPOSIX_MQ
, "send", _send
, -1);
893 rb_define_method(cPOSIX_MQ
, "<<", send0
, 1);
894 rb_define_method(cPOSIX_MQ
, "receive", receive
, -1);
895 rb_define_method(cPOSIX_MQ
, "shift", shift
, -1);
896 rb_define_method(cPOSIX_MQ
, "attr", getattr
, 0);
897 rb_define_method(cPOSIX_MQ
, "attr=", setattr
, 1);
898 rb_define_method(cPOSIX_MQ
, "close", _close
, 0);
899 rb_define_method(cPOSIX_MQ
, "closed?", closed
, 0);
900 rb_define_method(cPOSIX_MQ
, "unlink", _unlink
, 0);
901 rb_define_method(cPOSIX_MQ
, "name", name
, 0);
902 rb_define_method(cPOSIX_MQ
, "notify=", setnotify
, 1);
903 rb_define_method(cPOSIX_MQ
, "nonblock=", setnonblock
, 1);
904 rb_define_method(cPOSIX_MQ
, "notify_thread=", setnotifythread
, 1);
905 rb_define_method(cPOSIX_MQ
, "nonblock?", getnonblock
, 0);
907 rb_define_method(cPOSIX_MQ
, "to_io", to_io
, 0);
910 id_new
= rb_intern("new");
911 id_kill
= rb_intern("kill");
912 id_fileno
= rb_intern("fileno");
913 sym_r
= ID2SYM(rb_intern("r"));
914 sym_w
= ID2SYM(rb_intern("w"));
915 sym_rw
= ID2SYM(rb_intern("rw"));