178 lines
4.7 KiB
Groff
178 lines
4.7 KiB
Groff
.\" Copyright (C) 2000 Jason Evans <jasone@freebsd.org>.
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice(s), this list of conditions and the following disclaimer as
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.\" the first lines of this file unmodified other than the possible
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.\" addition of one or more copyright notices.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice(s), this list of conditions and the following disclaimer in
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.\" the documentation and/or other materials provided with the
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.\" distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
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.\" EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
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.\" LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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.\" BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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.\" WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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.\" OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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.\" EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.Dd May 1, 2000
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.Dt PTHREAD_MUTEXATTR 3
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.Os
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.Sh NAME
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.Nm pthread_mutexattr_init ,
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.Nm pthread_mutexattr_destroy ,
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.Nm pthread_mutexattr_setprioceiling ,
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.Nm pthread_mutexattr_getprioceiling ,
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.Nm pthread_mutexattr_setprotocol ,
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.Nm pthread_mutexattr_getprotocol ,
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.Nm pthread_mutexattr_settype ,
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.Nm pthread_mutexattr_gettype
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.Nd mutex attribute operations
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.Sh LIBRARY
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.Lb libc_r
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.Sh SYNOPSIS
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.Fd #include <pthread.h>
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.Ft int
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.Fn pthread_mutexattr_init "pthread_mutexattr_t *attr"
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.Ft int
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.Fn pthread_mutexattr_destroy "pthread_mutexattr_t *attr"
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.Ft int
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.Fn pthread_mutexattr_setprioceiling "pthread_mutexattr_t *attr" "int prioceiling"
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.Ft int
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.Fn pthread_mutexattr_getprioceiling "pthread_mutexattr_t *attr" "int *prioceiling"
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.Ft int
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.Fn pthread_mutexattr_setprotocol "pthread_mutexattr_t *attr" "int protocol"
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.Ft int
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.Fn pthread_mutexattr_getprotocol "pthread_mutexattr_t *attr" "int *protocol"
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.Ft int
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.Fn pthread_mutexattr_settype "pthread_mutexattr_t *attr" "int type"
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.Ft int
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.Fn pthread_mutexattr_gettype "pthread_mutexattr_t *attr" "int *type"
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.Sh DESCRIPTION
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Mutex attributes are used to specify parameters to
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.Fn pthread_mutex_init .
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One attribute object can be used in multiple calls to
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.Fn pthread_mutex_init ,
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with or without modifications between calls.
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.Pp
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The
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.Fn pthread_mutexattr_init
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function initializes
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.Fa attr
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with all the default mutex attributes.
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.Pp
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The
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.Fn pthread_mutexattr_destroy
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function destroys
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.Fa attr .
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.Pp
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The
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.Fn pthread_mutexattr_set*
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functions set the attribute that corresponds to each function name.
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.Pp
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The
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.Fn pthread_mutexattr_get*
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functions copy the value of the attribute that corresponds to each function name
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to the location pointed to by the second function parameter.
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.Sh RETURN VALUES
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If successful, these functions return 0.
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Otherwise, an error number is returned to indicacte the error.
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.Sh ERRORS
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.Fn pthread_mutexattr_init
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will fail if:
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.Bl -tag -width Er
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.It Bq Er ENOMEM
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Out of memory.
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.El
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.Pp
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.Fn pthread_mutexattr_destroy
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will fail if:
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.Bl -tag -width Er
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.It Bq Er EINVAL
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Invalid value for
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.Fa attr .
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.El
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.Pp
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.Fn pthread_mutexattr_setprioceiling
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will fail if:
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.Bl -tag -width Er
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.It Bq Er EINVAL
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Invalid value for
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.Fa attr ,
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or invalid value for
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.Fa prioceiling .
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.El
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.Pp
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.Fn pthread_mutexattr_getprioceiling
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will fail if:
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.Bl -tag -width Er
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.It Bq Er EINVAL
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Invalid value for
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.Fa attr .
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.El
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.Pp
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.Fn pthread_mutexattr_setprotocol
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will fail if:
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.Bl -tag -width Er
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.It Bq Er EINVAL
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Invalid value for
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.Fa attr ,
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or invalid value for
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.Fa protocol .
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.El
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.Pp
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.Fn pthread_mutexattr_getprotocol
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will fail if:
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.Bl -tag -width Er
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.It Bq Er EINVAL
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Invalid value for
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.Fa attr .
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.El
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.Pp
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.Fn pthread_mutexattr_settype
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will fail if:
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.Bl -tag -width Er
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.It Bq Er EINVAL
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Invalid value for
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.Fa attr ,
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or invalid value for
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.Fa type .
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.El
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.Pp
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.Fn pthread_mutexattr_gettype
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will fail if:
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.Bl -tag -width Er
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.It Bq Er EINVAL
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Invalid value for
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.Fa attr .
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.El
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.Sh SEE ALSO
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.Xr pthread_mutex_init 3
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.Sh STANDARDS
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.Fn pthread_mutexattr_init
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and
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.Fn pthread_mutexattr_destroy
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conform to
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.St -iso9945-1
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.Pp
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.Fn pthread_mutexattr_setprioceiling ,
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.Fn pthread_mutexattr_getprioceiling ,
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.Fn pthread_mutexattr_setprotocol ,
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.Fn pthread_mutexattr_getprotocol ,
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.Fn pthread_mutexattr_settype ,
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and
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.Fn pthread_mutexattr_gettype
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conform to
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.St -susv2
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