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 # define MQ_IO_MARK(mq) ((void)(0))
27 # define MQ_IO_SET(mq,val) ((void)(0))
31 # define MQ_IO_MARK(mq) rb_gc_mark((mq)->io)
32 # define MQ_IO_SET(mq,val) do { (mq)->io = (val); } while (0)
45 static VALUE cPOSIX_MQ
, cAttr
;
46 static ID id_new
, id_kill
, id_fileno
;
47 static ID sym_r
, sym_w
, sym_rw
;
48 static const mqd_t MQD_INVALID
= (mqd_t
)-1;
50 /* Ruby 1.8.6+ macros (for compatibility with Ruby 1.9) */
52 # define RSTRING_PTR(s) (RSTRING(s)->ptr)
55 # define RSTRING_LEN(s) (RSTRING(s)->len)
58 # define RSTRUCT_PTR(s) (RSTRUCT(s)->ptr)
61 # define RSTRUCT_LEN(s) (RSTRUCT(s)->len)
64 #ifndef HAVE_RB_STR_SET_LEN
66 # define rb_str_set_len(str,len) rb_str_resize(str,len)
67 # else /* 1.8.6 optimized version */
68 /* this is taken from Ruby 1.8.7, 1.8.6 may not have it */
69 static void rb_18_str_set_len(VALUE str
, long len
)
71 RSTRING(str
)->len
= len
;
72 RSTRING(str
)->ptr
[len
] = '\0';
74 # define rb_str_set_len(str,len) rb_18_str_set_len(str,len)
75 # endif /* ! RUBINIUS */
76 #endif /* !defined(HAVE_RB_STR_SET_LEN) */
78 #ifndef HAVE_RB_STRUCT_ALLOC_NOINIT
79 static VALUE
rb_struct_alloc_noinit(VALUE
class)
81 return rb_funcall(class, id_new
, 0, 0);
83 #endif /* !defined(HAVE_RB_STRUCT_ALLOC_NOINIT) */
85 /* partial emulation of the 1.9 rb_thread_blocking_region under 1.8 */
86 #ifndef HAVE_RB_THREAD_BLOCKING_REGION
88 # define RUBY_UBF_IO ((rb_unblock_function_t *)-1)
89 typedef void rb_unblock_function_t(void *);
90 typedef VALUE
rb_blocking_function_t(void *);
92 rb_thread_blocking_region(
93 rb_blocking_function_t
*func
, void *data1
,
94 rb_unblock_function_t
*ubf
, void *data2
)
98 assert(RUBY_UBF_IO
== ubf
&& "RUBY_UBF_IO required for emulation");
106 #endif /* ! HAVE_RB_THREAD_BLOCKING_REGION */
108 /* used to pass arguments to mq_open inside blocking region */
117 /* used to pass arguments to mq_send/mq_receive inside blocking region */
123 struct timespec
*timeout
;
126 /* hope it's there..., TODO: a better version that works in rbx */
127 struct timeval
rb_time_interval(VALUE
);
129 static struct timespec
*convert_timeout(struct timespec
*dest
, VALUE t
)
131 struct timeval tv
, now
;
136 tv
= rb_time_interval(t
); /* aggregate return :( */
137 gettimeofday(&now
, NULL
);
138 dest
->tv_sec
= now
.tv_sec
+ tv
.tv_sec
;
139 dest
->tv_nsec
= (now
.tv_usec
+ tv
.tv_usec
) * 1000;
141 if (dest
->tv_nsec
> 1000000000) {
142 dest
->tv_nsec
-= 1000000000;
149 /* (may) run without GVL */
150 static VALUE
xopen(void *ptr
)
152 struct open_args
*x
= ptr
;
156 case 2: rv
= mq_open(x
->name
, x
->oflags
); break;
157 case 3: rv
= mq_open(x
->name
, x
->oflags
, x
->mode
, NULL
); break;
158 case 4: rv
= mq_open(x
->name
, x
->oflags
, x
->mode
, &x
->attr
); break;
159 default: rv
= MQD_INVALID
;
165 /* runs without GVL */
166 static VALUE
xsend(void *ptr
)
168 struct rw_args
*x
= ptr
;
171 return (VALUE
)mq_timedsend(x
->des
, x
->msg_ptr
, x
->msg_len
,
172 x
->msg_prio
, x
->timeout
);
174 return (VALUE
)mq_send(x
->des
, x
->msg_ptr
, x
->msg_len
, x
->msg_prio
);
177 /* runs without GVL */
178 static VALUE
xrecv(void *ptr
)
180 struct rw_args
*x
= ptr
;
183 return (VALUE
)mq_timedreceive(x
->des
, x
->msg_ptr
, x
->msg_len
,
184 &x
->msg_prio
, x
->timeout
);
186 return (VALUE
)mq_receive(x
->des
, x
->msg_ptr
, x
->msg_len
, &x
->msg_prio
);
190 static void mark(void *ptr
)
192 struct posix_mq
*mq
= ptr
;
194 rb_gc_mark(mq
->name
);
195 rb_gc_mark(mq
->thread
);
200 static void _free(void *ptr
)
202 struct posix_mq
*mq
= ptr
;
204 if (mq
->des
!= MQD_INVALID
) {
205 /* we ignore errors when gc-ing */
206 int saved_errno
= errno
;
214 /* automatically called at creation (before initialize) */
215 static VALUE
alloc(VALUE klass
)
218 VALUE rv
= Data_Make_Struct(klass
, struct posix_mq
, mark
, _free
, mq
);
220 mq
->des
= MQD_INVALID
;
221 mq
->attr
.mq_flags
= 0;
222 mq
->attr
.mq_maxmsg
= 0;
223 mq
->attr
.mq_msgsize
= -1;
224 mq
->attr
.mq_curmsgs
= 0;
232 /* unwraps the posix_mq struct from self */
233 static struct posix_mq
*get(VALUE self
, int need_valid
)
237 Data_Get_Struct(self
, struct posix_mq
, mq
);
239 if (need_valid
&& mq
->des
== MQD_INVALID
)
240 rb_raise(rb_eIOError
, "closed queue descriptor");
245 /* converts the POSIX_MQ::Attr astruct into a struct mq_attr attr */
246 static void attr_from_struct(struct mq_attr
*attr
, VALUE astruct
, int all
)
250 if (CLASS_OF(astruct
) != cAttr
)
251 rb_raise(rb_eArgError
, "not a POSIX_MQ::Attr: %s",
252 RSTRING_PTR(rb_inspect(astruct
)));
254 ptr
= RSTRUCT_PTR(astruct
);
256 attr
->mq_flags
= NUM2LONG(ptr
[0]);
258 if (all
|| !NIL_P(ptr
[1]))
259 attr
->mq_maxmsg
= NUM2LONG(ptr
[1]);
260 if (all
|| !NIL_P(ptr
[2]))
261 attr
->mq_msgsize
= NUM2LONG(ptr
[2]);
263 attr
->mq_curmsgs
= NUM2LONG(ptr
[3]);
268 * POSIX_MQ.new(name [, flags [, mode [, mq_attr]]) => mq
270 * Opens a POSIX message queue given by +name+. +name+ should start
271 * with a slash ("/") for portable applications.
273 * If a Symbol is given in place of integer +flags+, then:
275 * * +:r+ is equivalent to IO::RDONLY
276 * * +:w+ is equivalent to IO::CREAT|IO::WRONLY
277 * * +:rw+ is equivalent to IO::CREAT|IO::RDWR
279 * +mode+ is an integer and only used when IO::CREAT is used.
280 * +mq_attr+ is a POSIX_MQ::Attr and only used if IO::CREAT is used.
281 * If +mq_attr+ is not specified when creating a queue, then the
282 * system defaults will be used.
284 * See the manpage for mq_open(3) for more details on this function.
286 static VALUE
init(int argc
, VALUE
*argv
, VALUE self
)
288 struct posix_mq
*mq
= get(self
, 0);
290 VALUE name
, oflags
, mode
, attr
;
292 rb_scan_args(argc
, argv
, "13", &name
, &oflags
, &mode
, &attr
);
294 if (TYPE(name
) != T_STRING
)
295 rb_raise(rb_eArgError
, "name must be a string");
297 switch (TYPE(oflags
)) {
304 else if (oflags
== sym_w
)
305 x
.oflags
= O_CREAT
|O_WRONLY
;
306 else if (oflags
== sym_rw
)
307 x
.oflags
= O_CREAT
|O_RDWR
;
309 rb_raise(rb_eArgError
,
310 "symbol must be :r, :w, or :rw: %s",
311 RSTRING_PTR(rb_inspect(oflags
)));
315 x
.oflags
= NUM2INT(oflags
);
318 rb_raise(rb_eArgError
, "flags must be an int, :r, :w, or :wr");
321 x
.name
= RSTRING_PTR(name
);
324 switch (TYPE(mode
)) {
327 x
.mode
= NUM2UINT(mode
);
330 if (x
.oflags
& O_CREAT
) {
336 rb_raise(rb_eArgError
, "mode not an integer");
339 switch (TYPE(attr
)) {
342 attr_from_struct(&x
.attr
, attr
, 1);
344 /* principle of least surprise */
345 if (x
.attr
.mq_flags
& O_NONBLOCK
)
346 x
.oflags
|= O_NONBLOCK
;
351 rb_raise(rb_eArgError
, "attr must be a POSIX_MQ::Attr: %s",
352 RSTRING_PTR(rb_inspect(attr
)));
355 mq
->des
= (mqd_t
)xopen(&x
);
356 if (mq
->des
== MQD_INVALID
)
357 rb_sys_fail("mq_open");
359 mq
->name
= rb_str_dup(name
);
360 if (x
.oflags
& O_NONBLOCK
)
361 mq
->attr
.mq_flags
= O_NONBLOCK
;
368 * POSIX_MQ.unlink(name) => 1
370 * Unlinks the message queue given by +name+. The queue will be destroyed
371 * when the last process with the queue open closes its queue descriptors.
373 static VALUE
s_unlink(VALUE self
, VALUE name
)
377 if (TYPE(name
) != T_STRING
)
378 rb_raise(rb_eArgError
, "argument must be a string");
380 rv
= mq_unlink(RSTRING_PTR(name
));
381 if (rv
== MQD_INVALID
)
382 rb_sys_fail("mq_unlink");
391 * Unlinks the message queue to prevent other processes from accessing it.
392 * All existing queue descriptors to this queue including those opened by
393 * other processes are unaffected. The queue will only be destroyed
394 * when the last process with open descriptors to this queue closes
397 static VALUE
_unlink(VALUE self
)
399 struct posix_mq
*mq
= get(self
, 0);
402 assert(TYPE(mq
->name
) == T_STRING
&& "mq->name is not a string");
404 rv
= mq_unlink(RSTRING_PTR(mq
->name
));
405 if (rv
== MQD_INVALID
)
406 rb_sys_fail("mq_unlink");
411 static void setup_send_buffer(struct rw_args
*x
, VALUE buffer
)
413 buffer
= rb_obj_as_string(buffer
);
414 x
->msg_ptr
= RSTRING_PTR(buffer
);
415 x
->msg_len
= (size_t)RSTRING_LEN(buffer
);
420 * mq.send(string [,priority[, timeout]]) => nil
422 * Inserts the given +string+ into the message queue with an optional,
423 * unsigned integer +priority+. If the optional +timeout+ is specified,
424 * then Errno::ETIMEDOUT will be raised if the operation cannot complete
425 * before +timeout+ seconds has elapsed. Without +timeout+, this method
426 * may block until the queue is writable.
428 static VALUE
_send(int argc
, VALUE
*argv
, VALUE self
)
430 struct posix_mq
*mq
= get(self
, 1);
432 VALUE buffer
, prio
, timeout
;
434 struct timespec expire
;
436 rb_scan_args(argc
, argv
, "12", &buffer
, &prio
, &timeout
);
438 setup_send_buffer(&x
, buffer
);
440 x
.timeout
= convert_timeout(&expire
, timeout
);
441 x
.msg_prio
= NIL_P(prio
) ? 0 : NUM2UINT(prio
);
443 if (mq
->attr
.mq_flags
& O_NONBLOCK
)
444 rv
= (mqd_t
)xsend(&x
);
446 rv
= (mqd_t
)rb_thread_blocking_region(xsend
, &x
,
448 if (rv
== MQD_INVALID
)
449 rb_sys_fail("mq_send");
458 * Inserts the given +string+ into the message queue with a
459 * default priority of 0 and no timeout.
461 static VALUE
send0(VALUE self
, VALUE buffer
)
463 struct posix_mq
*mq
= get(self
, 1);
467 setup_send_buffer(&x
, buffer
);
472 if (mq
->attr
.mq_flags
& O_NONBLOCK
)
473 rv
= (mqd_t
)xsend(&x
);
475 rv
= (mqd_t
)rb_thread_blocking_region(xsend
, &x
,
478 if (rv
== MQD_INVALID
)
479 rb_sys_fail("mq_send");
489 * Returns an IO.select-able +IO+ object. This method is only available
490 * under Linux and FreeBSD and is not intended to be portable.
492 static VALUE
to_io(VALUE self
)
494 struct posix_mq
*mq
= get(self
, 1);
495 int fd
= MQD_TO_FD(mq
->des
);
498 mq
->io
= rb_funcall(rb_cIO
, id_new
, 1, INT2NUM(fd
));
504 static VALUE
_receive(int wantarray
, int argc
, VALUE
*argv
, VALUE self
);
508 * mq.receive([buffer, [timeout]]) => [ message, priority ]
510 * Takes the highest priority message off the queue and returns
511 * an array containing the message as a String and the Integer
512 * priority of the message.
514 * If the optional +buffer+ is present, then it must be a String
515 * which will receive the data.
517 * If the optional +timeout+ is present, then it may be a Float
518 * or Integer specifying the timeout in seconds. Errno::ETIMEDOUT
519 * will be raised if +timeout+ has elapsed and there are no messages
522 static VALUE
receive(int argc
, VALUE
*argv
, VALUE self
)
524 return _receive(1, argc
, argv
, self
);
529 * mq.shift([buffer, [timeout]]) => message
531 * Takes the highest priority message off the queue and returns
532 * the message as a String.
534 * If the optional +buffer+ is present, then it must be a String
535 * which will receive the data.
537 * If the optional +timeout+ is present, then it may be a Float
538 * or Integer specifying the timeout in seconds. Errno::ETIMEDOUT
539 * will be raised if +timeout+ has elapsed and there are no messages
542 static VALUE
shift(int argc
, VALUE
*argv
, VALUE self
)
544 return _receive(0, argc
, argv
, self
);
547 static VALUE
_receive(int wantarray
, int argc
, VALUE
*argv
, VALUE self
)
549 struct posix_mq
*mq
= get(self
, 1);
551 VALUE buffer
, timeout
;
553 struct timespec expire
;
555 if (mq
->attr
.mq_msgsize
< 0) {
556 if (mq_getattr(mq
->des
, &mq
->attr
) < 0)
557 rb_sys_fail("mq_getattr");
560 rb_scan_args(argc
, argv
, "02", &buffer
, &timeout
);
561 x
.timeout
= convert_timeout(&expire
, timeout
);
564 buffer
= rb_str_new(0, mq
->attr
.mq_msgsize
);
567 rb_str_modify(buffer
);
568 rb_str_resize(buffer
, mq
->attr
.mq_msgsize
);
571 x
.msg_ptr
= RSTRING_PTR(buffer
);
572 x
.msg_len
= (size_t)mq
->attr
.mq_msgsize
;
575 if (mq
->attr
.mq_flags
& O_NONBLOCK
) {
576 r
= (ssize_t
)xrecv(&x
);
578 r
= (ssize_t
)rb_thread_blocking_region(xrecv
, &x
,
582 rb_sys_fail("mq_receive");
584 rb_str_set_len(buffer
, r
);
587 return rb_ary_new3(2, buffer
, UINT2NUM(x
.msg_prio
));
595 * Returns a POSIX_MQ::Attr struct containing the attributes
596 * of the message queue. See the mq_getattr(3) manpage for
599 static VALUE
getattr(VALUE self
)
601 struct posix_mq
*mq
= get(self
, 1);
605 if (mq_getattr(mq
->des
, &mq
->attr
) < 0)
606 rb_sys_fail("mq_getattr");
608 astruct
= rb_struct_alloc_noinit(cAttr
);
609 ptr
= RSTRUCT_PTR(astruct
);
610 ptr
[0] = LONG2NUM(mq
->attr
.mq_flags
);
611 ptr
[1] = LONG2NUM(mq
->attr
.mq_maxmsg
);
612 ptr
[2] = LONG2NUM(mq
->attr
.mq_msgsize
);
613 ptr
[3] = LONG2NUM(mq
->attr
.mq_curmsgs
);
620 * mq.attr = POSIX_MQ::Attr(IO::NONBLOCK) => mq_attr
622 * Only the IO::NONBLOCK flag may be set or unset (zero) in this manner.
623 * See the mq_setattr(3) manpage for more details.
625 * Consider using the POSIX_MQ#nonblock= method as it is easier and
626 * more natural to use.
628 static VALUE
setattr(VALUE self
, VALUE astruct
)
630 struct posix_mq
*mq
= get(self
, 1);
631 struct mq_attr newattr
;
633 attr_from_struct(&newattr
, astruct
, 0);
635 if (mq_setattr(mq
->des
, &newattr
, NULL
) < 0)
636 rb_sys_fail("mq_setattr");
645 * Closes the underlying message queue descriptor.
646 * If this descriptor had a registered notification request, the request
647 * will be removed so another descriptor or process may register a
648 * notification request. Message queue descriptors are automatically
649 * closed by garbage collection.
651 static VALUE
_close(VALUE self
)
653 struct posix_mq
*mq
= get(self
, 1);
655 if (mq_close(mq
->des
) < 0)
656 rb_sys_fail("mq_close");
658 mq
->des
= MQD_INVALID
;
666 * mq.closed? => true or false
668 * Returns +true+ if the message queue descriptor is closed and therefore
669 * unusable, otherwise +false+
671 static VALUE
closed(VALUE self
)
673 struct posix_mq
*mq
= get(self
, 0);
675 return mq
->des
== MQD_INVALID
? Qtrue
: Qfalse
;
682 * Returns the string name of message queue associated with +mq+
684 static VALUE
name(VALUE self
)
686 struct posix_mq
*mq
= get(self
, 0);
688 return rb_str_dup(mq
->name
);
691 static int lookup_sig(VALUE sig
)
697 sig
= rb_obj_as_string(sig
);
698 len
= RSTRING_LEN(sig
);
699 ptr
= RSTRING_PTR(sig
);
701 if (len
> 3 && !memcmp("SIG", ptr
, 3))
702 sig
= rb_str_new(ptr
+ 3, len
- 3);
705 VALUE mSignal
= rb_const_get(rb_cObject
, rb_intern("Signal"));
707 list
= rb_funcall(mSignal
, rb_intern("list"), 0, 0);
708 rb_global_variable(&list
);
711 sig
= rb_hash_aref(list
, sig
);
713 rb_raise(rb_eArgError
, "invalid signal: %s\n",
714 RSTRING_PTR(rb_inspect(sig
)));
719 /* we spawn a thread just to write ONE byte into an fd (usually a pipe) */
720 static void thread_notify_fd(union sigval sv
)
722 int fd
= sv
.sival_int
;
724 while ((write(fd
, "", 1) < 0) && (errno
== EINTR
|| errno
== EAGAIN
));
728 * TODO: Under Linux, we could just use netlink directly
729 * the same way glibc does...
731 static void setup_notify_io(struct sigevent
*not, VALUE io
)
733 int fd
= NUM2INT(rb_funcall(io
, id_fileno
, 0, 0));
737 if ((e
= pthread_attr_init(&attr
)))
739 if ((e
= pthread_attr_setdetachstate(&attr
, PTHREAD_CREATE_DETACHED
)))
741 #ifdef PTHREAD_STACK_MIN
742 (void)pthread_attr_setstacksize(&attr
, PTHREAD_STACK_MIN
);
744 not->sigev_notify
= SIGEV_THREAD
;
745 not->sigev_notify_function
= thread_notify_fd
;
746 not->sigev_notify_attributes
= &attr
;
747 not->sigev_value
.sival_int
= fd
;
750 rb_raise(rb_eRuntimeError
, "pthread failure: %s\n", strerror(e
));
755 * mq.notify = signal => signal
757 * Registers the notification request to deliver a given +signal+
758 * to the current process when message is received.
759 * If +signal+ is +nil+, it will unregister and disable the notification
760 * request to allow other processes to register a request.
761 * If +signal+ is +false+, it will register a no-op notification request
762 * which will prevent other processes from registering a notification.
763 * If +signal+ is an +IO+ object, it will spawn a thread upon the
764 * arrival of the next message and write one "\\0" byte to the file
765 * descriptor belonging to that IO object.
766 * Only one process may have a notification request for a queue
767 * at a time, Errno::EBUSY will be raised if there is already
768 * a notification request registration for the queue.
770 * Notifications are only fired once and processes must reregister
771 * for subsequent notifications.
773 * For readers of the mq_notify(3) manpage, passing +false+
774 * is equivalent to SIGEV_NONE, and passing +nil+ is equivalent
775 * of passing a NULL notification pointer to mq_notify(3).
777 static VALUE
setnotify(VALUE self
, VALUE arg
)
779 struct posix_mq
*mq
= get(self
, 1);
781 struct sigevent
* notification
= ¬
784 if (!NIL_P(mq
->thread
)) {
785 rb_funcall(mq
->thread
, id_kill
, 0, 0);
788 not.sigev_notify
= SIGEV_SIGNAL
;
792 not.sigev_notify
= SIGEV_NONE
;
798 not.sigev_signo
= NUM2INT(arg
);
802 not.sigev_signo
= lookup_sig(arg
);
803 rv
= INT2NUM(not.sigev_signo
);
806 setup_notify_io(¬, arg
);
809 /* maybe support Proc+thread via sigev_notify_function.. */
810 rb_raise(rb_eArgError
, "must be a signal or nil");
813 if (mq_notify(mq
->des
, notification
) < 0)
814 rb_sys_fail("mq_notify");
821 * mq.nonblock? => true or false
823 * Returns the current non-blocking state of the message queue descriptor.
825 static VALUE
getnonblock(VALUE self
)
827 struct posix_mq
*mq
= get(self
, 1);
829 return mq
->attr
.mq_flags
& O_NONBLOCK
? Qtrue
: Qfalse
;
834 * mq.nonblock = boolean => boolean
836 * Enables or disables non-blocking operation for the message queue
837 * descriptor. Errno::EAGAIN will be raised in situations where
838 * the queue would block. This is not compatible with +timeout+
839 * arguments to POSIX_MQ#send and POSIX_MQ#receive.
841 static VALUE
setnonblock(VALUE self
, VALUE nb
)
843 struct mq_attr newattr
;
844 struct posix_mq
*mq
= get(self
, 1);
847 newattr
.mq_flags
= O_NONBLOCK
;
848 else if (nb
== Qfalse
)
849 newattr
.mq_flags
= 0;
851 rb_raise(rb_eArgError
, "must be true or false");
853 if (mq_setattr(mq
->des
, &newattr
, &mq
->attr
) < 0)
854 rb_sys_fail("mq_setattr");
856 mq
->attr
.mq_flags
= newattr
.mq_flags
;
862 static VALUE
setnotifythread(VALUE self
, VALUE thread
)
864 struct posix_mq
*mq
= get(self
, 1);
870 void Init_posix_mq_ext(void)
872 cPOSIX_MQ
= rb_define_class("POSIX_MQ", rb_cObject
);
873 rb_define_alloc_func(cPOSIX_MQ
, alloc
);
874 cAttr
= rb_const_get(cPOSIX_MQ
, rb_intern("Attr"));
877 * The maximum number of open message descriptors supported
878 * by the system. This may be -1, in which case it is dynamically
879 * set at runtime. Consult your operating system documentation
880 * for system-specific information about this.
882 rb_define_const(cPOSIX_MQ
, "OPEN_MAX",
883 LONG2NUM(sysconf(_SC_MQ_OPEN_MAX
)));
886 * The maximum priority that may be specified for POSIX_MQ#send
887 * On POSIX-compliant systems, this is at least 31, but some
888 * systems allow higher limits.
889 * The minimum priority is always zero.
891 rb_define_const(cPOSIX_MQ
, "PRIO_MAX",
892 LONG2NUM(sysconf(_SC_MQ_PRIO_MAX
)));
894 rb_define_singleton_method(cPOSIX_MQ
, "unlink", s_unlink
, 1);
896 rb_define_method(cPOSIX_MQ
, "initialize", init
, -1);
897 rb_define_method(cPOSIX_MQ
, "send", _send
, -1);
898 rb_define_method(cPOSIX_MQ
, "<<", send0
, 1);
899 rb_define_method(cPOSIX_MQ
, "receive", receive
, -1);
900 rb_define_method(cPOSIX_MQ
, "shift", shift
, -1);
901 rb_define_method(cPOSIX_MQ
, "attr", getattr
, 0);
902 rb_define_method(cPOSIX_MQ
, "attr=", setattr
, 1);
903 rb_define_method(cPOSIX_MQ
, "close", _close
, 0);
904 rb_define_method(cPOSIX_MQ
, "closed?", closed
, 0);
905 rb_define_method(cPOSIX_MQ
, "unlink", _unlink
, 0);
906 rb_define_method(cPOSIX_MQ
, "name", name
, 0);
907 rb_define_method(cPOSIX_MQ
, "notify=", setnotify
, 1);
908 rb_define_method(cPOSIX_MQ
, "nonblock=", setnonblock
, 1);
909 rb_define_method(cPOSIX_MQ
, "notify_thread=", setnotifythread
, 1);
910 rb_define_method(cPOSIX_MQ
, "nonblock?", getnonblock
, 0);
912 rb_define_method(cPOSIX_MQ
, "to_io", to_io
, 0);
915 id_new
= rb_intern("new");
916 id_kill
= rb_intern("kill");
917 id_fileno
= rb_intern("fileno");
918 sym_r
= ID2SYM(rb_intern("r"));
919 sym_w
= ID2SYM(rb_intern("w"));
920 sym_rw
= ID2SYM(rb_intern("rw"));