[apple/libc.git] / pthreads / pthread_mutexattr.3

.\" $NetBSD: pthread_mutexattr.3,v 1.3 2003/07/04 08:36:06 wiz Exp $
.\"
.\" Copyright (c) 2002 The NetBSD Foundation, Inc.
.\" All rights reserved.
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\"    notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\"    notice, this list of conditions and the following disclaimer in the
.\"    documentation and/or other materials provided with the distribution.
.\" 3. Neither the name of The NetBSD Foundation nor the names of its
.\"    contributors may be used to endorse or promote products derived
.\"    from this software without specific prior written permission.
.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
.\" PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
.\" POSSIBILITY OF SUCH DAMAGE.
.\"
.\" Copyright (C) 2000 Jason Evans <jasone@FreeBSD.org>.
.\" All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\"    notice(s), this list of conditions and the following disclaimer as
.\"    the first lines of this file unmodified other than the possible
.\"    addition of one or more copyright notices.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\"    notice(s), this list of conditions and the following disclaimer in
.\"    the documentation and/or other materials provided with the
.\"    distribution.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
.\" EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
.\" PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
.\" LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
.\" BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
.\" WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
.\" OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
.\" EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
.\"
.\" $FreeBSD: src/lib/libpthread/man/pthread_mutexattr.3,v 1.8 2002/09/16 19:29:29 mini Exp $
.Dd January 30, 2003
.Dt PTHREAD_MUTEXATTR 3
.Os
.Sh NAME
.Nm pthread_mutexattr_destroy ,
.Nm pthread_mutexattr_getprioceiling ,
.Nm pthread_mutexattr_getprotocol ,
.Nm pthread_mutexattr_gettype ,
.Nm pthread_mutexattr_init ,
.Nm pthread_mutexattr_setprioceiling ,
.Nm pthread_mutexattr_setprotocol ,
.Nm pthread_mutexattr_settype
.Nd mutex attribute operations
.Sh SYNOPSIS
.Fd #include <pthread.h>
.Ft int
.Fo pthread_mutexattr_destroy
.Fa "pthread_mutexattr_t *attr"
.Fc
.Ft int
.Fo pthread_mutexattr_getprioceiling
.Fa "const pthread_mutexattr_t *attr"
.Fa "int *prioceiling"
.Fc
.\" To match the SUS, this should be:
.\" .Ft int
.\" .Fo pthread_mutexattr_getprioceiling
.\" .Fa "pthread_mutexattr_t *restrict attr"
.\" .Fa "int *restrict prioceiling"
.\" .Fc
.Ft int
.Fo pthread_mutexattr_getprotocol
.Fa "const pthread_mutexattr_t *attr"
.Fa "int *protocol"
.Fc
.\" To match the SUS, this should be:
.\" .Ft int
.\" .Fo pthread_mutexattr_getprotocol
.\" .Fa "pthread_mutexattr_t *restrict attr"
.\" .Fa "int *restrict protocol"
.\" .Fc
.Ft int
.Fo pthread_mutexattr_gettype
.Fa "const pthread_mutexattr_t *attr"
.Fa "int *type"
.Fc
.\" To match the SUS, this should be:
.\" .Ft int
.\" .Fo pthread_mutexattr_gettype
.\" .Fa "pthread_mutexattr_t *restrict attr"
.\" .Fa "int *restrict type"
.\" .Fc
.Ft int
.Fo pthread_mutexattr_init
.Fa "pthread_mutexattr_t *attr"
.Fc
.Ft int
.Fo pthread_mutexattr_setprioceiling
.Fa "pthread_mutexattr_t *attr"
.Fa "int prioceiling"
.Fc
.Ft int
.Fo pthread_mutexattr_setprotocol
.Fa "pthread_mutexattr_t *attr"
.Fa "int protocol"
.Fc
.Ft int
.Fo pthread_mutexattr_settype
.Fa "pthread_mutexattr_t *attr"
.Fa "int type"
.Fc
.Sh DESCRIPTION
Mutex attributes are used to specify parameters to
.Fn pthread_mutex_init .
One attribute object can be used in multiple calls to
.Fn pthread_mutex_init ,
with or without modifications between calls.
.Pp
The
.Fn pthread_mutexattr_init
function initializes
.Fa attr
with all of the default mutex attributes.
.Pp
The
.Fn pthread_mutexattr_destroy
function destroys
.Fa attr .
.Pp
The
.Fn pthread_mutexattr_settype
function sets the mutex type value of the attribute.  Valid mutex types are:
.Dv PTHREAD_MUTEX_NORMAL ,
.Dv PTHREAD_MUTEX_ERRORCHECK ,
.Dv PTHREAD_MUTEX_RECURSIVE ,
and
.Dv PTHREAD_MUTEX_DEFAULT .
The default mutex type for
.Fn pthread_mutexaddr_init
is
.Dv PTHREAD_MUTEX_DEFAULT .
.Pp
.Dv PTHREAD_MUTEX_NORMAL
mutexes do not check for usage errors.
.Dv PTHREAD_MUTEX_NORMAL
mutexes will deadlock if reentered, and result in undefined behavior if a
locked mutex is unlocked by another thread.  Attempts to unlock an already
unlocked
.Dv PTHREAD_MUTEX_NORMAL
mutex will result in undefined behavior.
.Pp
.Dv PTHREAD_MUTEX_ERRORCHECK
mutexes do check for usage errors.
If an attempt is made to relock a
.Dv PTHREAD_MUTEX_ERRORCHECK
mutex without first dropping the lock, an error will be returned.
If a thread attempts to unlock a
.Dv PTHREAD_MUTEX_ERRORCHECK
mutex that is locked by another thread, an error will be returned.  If a
thread attempts to unlock a
.Dv PTHREAD_MUTEX_ERRORCHECK
thread that is unlocked, an error will be returned.
.Pp
.Dv PTHREAD_MUTEX_RECURSIVE
mutexes allow recursive locking.
An attempt to relock a
.Dv PTHREAD_MUTEX_RECURSIVE
mutex that is already locked by the same thread succeeds.  An equivalent
number of
.Xr pthread_mutex_unlock 3
calls are needed before the mutex will wake another thread waiting on this
lock.  If a thread attempts to unlock a
.Dv PTHREAD_MUTEX_RECURSIVE
mutex that is locked by another thread, an error will be returned.  If a thread attemps to unlock a
.Dv PTHREAD_MUTEX_RECURSIVE
thread that is unlocked, an error will be returned.
.Pp
.Dv PTHREAD_MUTEX_DEFAULT
mutexes result in undefined behavior if reentered.
Unlocking a
.Dv PTHREAD_MUTEX_DEFAULT
mutex locked by another thread will result in undefined behavior.  Attempts to unlock an already
unlocked
.Dv PTHREAD_MUTEX_DEFAULT
mutex will result in undefined behavior.
.Pp
.Fn pthread_mutexattr_gettype
functions copy the type value of the attribute to the location pointed to by the second parameter.
.Pp
The
.Fn pthread_mutexattr_set*
functions set the attribute that corresponds to each function name.
.Pp
The
.Fn pthread_mutexattr_get*
functions copy the value of the attribute that corresponds to each function name
to the location pointed to by the second function parameter.
.Sh RETURN VALUES
If successful, these functions return 0.
Otherwise, an error number is returned to indicate the error.
.Sh ERRORS
.Fn pthread_mutexattr_init
will fail if:
.Bl -tag -width Er
.It Bq Er ENOMEM
Out of memory.
.El
.Pp
.Fn pthread_mutexattr_destroy
will fail if:
.Bl -tag -width Er
.It Bq Er EINVAL
Invalid value for
.Fa attr .
.El
.Pp
.Fn pthread_mutexattr_setprioceiling
will fail if:
.Bl -tag -width Er
.It Bq Er EINVAL
Invalid value for
.Fa attr ,
or invalid value for
.Fa prioceiling .
.El
.Pp
.Fn pthread_mutexattr_getprioceiling
will fail if:
.Bl -tag -width Er
.It Bq Er EINVAL
Invalid value for
.Fa attr .
.El
.Pp
.Fn pthread_mutexattr_setprotocol
will fail if:
.Bl -tag -width Er
.It Bq Er EINVAL
Invalid value for
.Fa attr ,
or invalid value for
.Fa protocol .
.El
.Pp
.Fn pthread_mutexattr_getprotocol
will fail if:
.Bl -tag -width Er
.It Bq Er EINVAL
Invalid value for
.Fa attr .
.El
.Pp
.Fn pthread_mutexattr_settype
will fail if:
.Bl -tag -width Er
.It Bq Er EINVAL
Invalid value for
.Fa attr ,
or invalid value for
.Fa type .
.El
.Pp
.Fn pthread_mutexattr_gettype
will fail if:
.Bl -tag -width Er
.It Bq Er EINVAL
Invalid value for
.Fa attr .
.El
.Sh SEE ALSO
.Xr pthread_mutex_init 3
.Sh STANDARDS
.Fn pthread_mutexattr_init
and
.Fn pthread_mutexattr_destroy
conform to
.St -p1003.1-96
.Pp
.Fn pthread_mutexattr_setprioceiling ,
.Fn pthread_mutexattr_getprioceiling ,
.Fn pthread_mutexattr_setprotocol ,
.Fn pthread_mutexattr_getprotocol ,
.Fn pthread_mutexattr_settype ,
and
.Fn pthread_mutexattr_gettype
conform to
.St -susv2
Commit	Line	Data
9385eb3d A	1	.\" $NetBSD: pthread_mutexattr.3,v 1.3 2003/07/04 08:36:06 wiz Exp $
	2	.\"
	3	.\" Copyright (c) 2002 The NetBSD Foundation, Inc.
	4	.\" All rights reserved.
	5	.\" Redistribution and use in source and binary forms, with or without
	6	.\" modification, are permitted provided that the following conditions
	7	.\" are met:
	8	.\" 1. Redistributions of source code must retain the above copyright
	9	.\" notice, this list of conditions and the following disclaimer.
	10	.\" 2. Redistributions in binary form must reproduce the above copyright
	11	.\" notice, this list of conditions and the following disclaimer in the
	12	.\" documentation and/or other materials provided with the distribution.
	13	.\" 3. Neither the name of The NetBSD Foundation nor the names of its
	14	.\" contributors may be used to endorse or promote products derived
	15	.\" from this software without specific prior written permission.
	16	.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
	17	.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
	18	.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
	19	.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
	20	.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
	21	.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
	22	.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
	23	.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
	24	.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
	25	.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
	26	.\" POSSIBILITY OF SUCH DAMAGE.
	27	.\"
5b2abdfb A	28	.\" Copyright (C) 2000 Jason Evans <jasone@FreeBSD.org>.
	29	.\" All rights reserved.
	30	.\"
	31	.\" Redistribution and use in source and binary forms, with or without
	32	.\" modification, are permitted provided that the following conditions
	33	.\" are met:
	34	.\" 1. Redistributions of source code must retain the above copyright
	35	.\" notice(s), this list of conditions and the following disclaimer as
	36	.\" the first lines of this file unmodified other than the possible
	37	.\" addition of one or more copyright notices.
	38	.\" 2. Redistributions in binary form must reproduce the above copyright
	39	.\" notice(s), this list of conditions and the following disclaimer in
	40	.\" the documentation and/or other materials provided with the
	41	.\" distribution.
	42	.\"
	43	.\" THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
	44	.\" EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	45	.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
	46	.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
	47	.\" LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
	48	.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
	49	.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
	50	.\" BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
	51	.\" WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
	52	.\" OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
	53	.\" EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	54	.\"
9385eb3d A	55	.\" $FreeBSD: src/lib/libpthread/man/pthread_mutexattr.3,v 1.8 2002/09/16 19:29:29 mini Exp $
9385eb3d A	56	.Dd January 30, 2003
5b2abdfb A	57	.Dt PTHREAD_MUTEXATTR 3
	58	.Os
	59	.Sh NAME
5b2abdfb	60	.Nm pthread_mutexattr_destroy ,
5b2abdfb	61	.Nm pthread_mutexattr_getprioceiling ,
5b2abdfb	62	.Nm pthread_mutexattr_getprotocol ,
224c7076 A	63	.Nm pthread_mutexattr_gettype ,
	64	.Nm pthread_mutexattr_init ,
	65	.Nm pthread_mutexattr_setprioceiling ,
	66	.Nm pthread_mutexattr_setprotocol ,
	67	.Nm pthread_mutexattr_settype
5b2abdfb A	68	.Nd mutex attribute operations
	69	.Sh SYNOPSIS
	70	.Fd #include <pthread.h>
	71	.Ft int
224c7076 A	72	.Fo pthread_mutexattr_destroy
	73	.Fa "pthread_mutexattr_t *attr"
	74	.Fc
5b2abdfb	75	.Ft int
224c7076 A	76	.Fo pthread_mutexattr_getprioceiling
	77	.Fa "const pthread_mutexattr_t *attr"
	78	.Fa "int *prioceiling"
	79	.Fc
	80	.\" To match the SUS, this should be:
	81	.\" .Ft int
	82	.\" .Fo pthread_mutexattr_getprioceiling
	83	.\" .Fa "pthread_mutexattr_t *restrict attr"
	84	.\" .Fa "int *restrict prioceiling"
	85	.\" .Fc
5b2abdfb	86	.Ft int
224c7076 A	87	.Fo pthread_mutexattr_getprotocol
	88	.Fa "const pthread_mutexattr_t *attr"
	89	.Fa "int *protocol"
	90	.Fc
	91	.\" To match the SUS, this should be:
	92	.\" .Ft int
	93	.\" .Fo pthread_mutexattr_getprotocol
	94	.\" .Fa "pthread_mutexattr_t *restrict attr"
	95	.\" .Fa "int *restrict protocol"
	96	.\" .Fc
5b2abdfb	97	.Ft int
224c7076 A	98	.Fo pthread_mutexattr_gettype
	99	.Fa "const pthread_mutexattr_t *attr"
	100	.Fa "int *type"
	101	.Fc
	102	.\" To match the SUS, this should be:
	103	.\" .Ft int
	104	.\" .Fo pthread_mutexattr_gettype
	105	.\" .Fa "pthread_mutexattr_t *restrict attr"
	106	.\" .Fa "int *restrict type"
	107	.\" .Fc
5b2abdfb	108	.Ft int
224c7076 A	109	.Fo pthread_mutexattr_init
	110	.Fa "pthread_mutexattr_t *attr"
	111	.Fc
5b2abdfb	112	.Ft int
224c7076 A	113	.Fo pthread_mutexattr_setprioceiling
	114	.Fa "pthread_mutexattr_t *attr"
	115	.Fa "int prioceiling"
	116	.Fc
5b2abdfb	117	.Ft int
224c7076 A	118	.Fo pthread_mutexattr_setprotocol
	119	.Fa "pthread_mutexattr_t *attr"
	120	.Fa "int protocol"
	121	.Fc
5b2abdfb	122	.Ft int
224c7076 A	123	.Fo pthread_mutexattr_settype
	124	.Fa "pthread_mutexattr_t *attr"
	125	.Fa "int type"
	126	.Fc
5b2abdfb A	127	.Sh DESCRIPTION
	128	Mutex attributes are used to specify parameters to
	129	.Fn pthread_mutex_init .
	130	One attribute object can be used in multiple calls to
	131	.Fn pthread_mutex_init ,
	132	with or without modifications between calls.
	133	.Pp
	134	The
	135	.Fn pthread_mutexattr_init
	136	function initializes
	137	.Fa attr
224c7076	138	with all of the default mutex attributes.
5b2abdfb A	139	.Pp
	140	The
	141	.Fn pthread_mutexattr_destroy
	142	function destroys
	143	.Fa attr .
	144	.Pp
	145	The
9385eb3d	146	.Fn pthread_mutexattr_settype
224c7076	147	function sets the mutex type value of the attribute. Valid mutex types are:
9385eb3d A	148	.Dv PTHREAD_MUTEX_NORMAL ,
	149	.Dv PTHREAD_MUTEX_ERRORCHECK ,
	150	.Dv PTHREAD_MUTEX_RECURSIVE ,
	151	and
	152	.Dv PTHREAD_MUTEX_DEFAULT .
	153	The default mutex type for
	154	.Fn pthread_mutexaddr_init
	155	is
	156	.Dv PTHREAD_MUTEX_DEFAULT .
	157	.Pp
224c7076	158	.Dv PTHREAD_MUTEX_NORMAL
9385eb3d A	159	mutexes do not check for usage errors.
	160	.Dv PTHREAD_MUTEX_NORMAL
	161	mutexes will deadlock if reentered, and result in undefined behavior if a
	162	locked mutex is unlocked by another thread. Attempts to unlock an already
	163	unlocked
	164	.Dv PTHREAD_MUTEX_NORMAL
	165	mutex will result in undefined behavior.
	166	.Pp
	167	.Dv PTHREAD_MUTEX_ERRORCHECK
	168	mutexes do check for usage errors.
	169	If an attempt is made to relock a
	170	.Dv PTHREAD_MUTEX_ERRORCHECK
224c7076 A	171	mutex without first dropping the lock, an error will be returned.
224c7076 A	172	If a thread attempts to unlock a
9385eb3d A	173	.Dv PTHREAD_MUTEX_ERRORCHECK
9385eb3d A	174	mutex that is locked by another thread, an error will be returned. If a
224c7076	175	thread attempts to unlock a
9385eb3d	176	.Dv PTHREAD_MUTEX_ERRORCHECK
224c7076	177	thread that is unlocked, an error will be returned.
9385eb3d A	178	.Pp
	179	.Dv PTHREAD_MUTEX_RECURSIVE
	180	mutexes allow recursive locking.
	181	An attempt to relock a
	182	.Dv PTHREAD_MUTEX_RECURSIVE
	183	mutex that is already locked by the same thread succeeds. An equivalent
	184	number of
	185	.Xr pthread_mutex_unlock 3
	186	calls are needed before the mutex will wake another thread waiting on this
	187	lock. If a thread attempts to unlock a
	188	.Dv PTHREAD_MUTEX_RECURSIVE
	189	mutex that is locked by another thread, an error will be returned. If a thread attemps to unlock a
	190	.Dv PTHREAD_MUTEX_RECURSIVE
	191	thread that is unlocked, an error will be returned.
	192	.Pp
	193	.Dv PTHREAD_MUTEX_DEFAULT
	194	mutexes result in undefined behavior if reentered.
	195	Unlocking a
	196	.Dv PTHREAD_MUTEX_DEFAULT
	197	mutex locked by another thread will result in undefined behavior. Attempts to unlock an already
	198	unlocked
	199	.Dv PTHREAD_MUTEX_DEFAULT
	200	mutex will result in undefined behavior.
	201	.Pp
	202	.Fn pthread_mutexattr_gettype
	203	functions copy the type value of the attribute to the location pointed to by the second parameter.
	204	.Pp
	205	The
5b2abdfb A	206	.Fn pthread_mutexattr_set*
	207	functions set the attribute that corresponds to each function name.
	208	.Pp
	209	The
	210	.Fn pthread_mutexattr_get*
	211	functions copy the value of the attribute that corresponds to each function name
	212	to the location pointed to by the second function parameter.
	213	.Sh RETURN VALUES
	214	If successful, these functions return 0.
9385eb3d	215	Otherwise, an error number is returned to indicate the error.
5b2abdfb A	216	.Sh ERRORS
	217	.Fn pthread_mutexattr_init
	218	will fail if:
	219	.Bl -tag -width Er
	220	.It Bq Er ENOMEM
	221	Out of memory.
	222	.El
	223	.Pp
	224	.Fn pthread_mutexattr_destroy
	225	will fail if:
	226	.Bl -tag -width Er
	227	.It Bq Er EINVAL
	228	Invalid value for
	229	.Fa attr .
	230	.El
	231	.Pp
	232	.Fn pthread_mutexattr_setprioceiling
	233	will fail if:
	234	.Bl -tag -width Er
	235	.It Bq Er EINVAL
	236	Invalid value for
	237	.Fa attr ,
	238	or invalid value for
	239	.Fa prioceiling .
	240	.El
	241	.Pp
	242	.Fn pthread_mutexattr_getprioceiling
	243	will fail if:
	244	.Bl -tag -width Er
	245	.It Bq Er EINVAL
	246	Invalid value for
	247	.Fa attr .
	248	.El
	249	.Pp
	250	.Fn pthread_mutexattr_setprotocol
	251	will fail if:
	252	.Bl -tag -width Er
	253	.It Bq Er EINVAL
	254	Invalid value for
	255	.Fa attr ,
	256	or invalid value for
	257	.Fa protocol .
	258	.El
	259	.Pp
	260	.Fn pthread_mutexattr_getprotocol
	261	will fail if:
	262	.Bl -tag -width Er
	263	.It Bq Er EINVAL
	264	Invalid value for
	265	.Fa attr .
	266	.El
	267	.Pp
	268	.Fn pthread_mutexattr_settype
	269	will fail if:
	270	.Bl -tag -width Er
	271	.It Bq Er EINVAL
	272	Invalid value for
	273	.Fa attr ,
	274	or invalid value for
	275	.Fa type .
	276	.El
	277	.Pp
	278	.Fn pthread_mutexattr_gettype
	279	will fail if:
280	.Bl -tag -width Er
281	.It Bq Er EINVAL
282	Invalid value for
283	.Fa attr .
284	.El
285	.Sh SEE ALSO
286	.Xr pthread_mutex_init 3
287	.Sh STANDARDS
288	.Fn pthread_mutexattr_init
289	and
290	.Fn pthread_mutexattr_destroy
291	conform to
292	.St -p1003.1-96
293	.Pp
294	.Fn pthread_mutexattr_setprioceiling ,
295	.Fn pthread_mutexattr_getprioceiling ,
296	.Fn pthread_mutexattr_setprotocol ,
297	.Fn pthread_mutexattr_getprotocol ,
298	.Fn pthread_mutexattr_settype ,
299	and
300	.Fn pthread_mutexattr_gettype
301	conform to
302	.St -susv2