af33553b47
This basically adds makes use of the C99 restrict keyword, and also adds some 'const's to four threading functions: pthread_mutexattr_gettype(), pthread_mutexattr_getprioceiling(), pthread_mutexattr_getprotocol(), and pthread_mutex_getprioceiling. The changes are in accordance to POSIX/SUSv4-2018. Hinted by: DragonFlyBSD Relnotes: yes MFC after: 1 month Differential Revision: D16722
239 lines
6.7 KiB
Groff
239 lines
6.7 KiB
Groff
.\" 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.
|
|
.\"
|
|
.\" $FreeBSD$
|
|
.Dd August 17, 2018
|
|
.Dt PTHREAD_ATTR 3
|
|
.Os
|
|
.Sh NAME
|
|
.Nm pthread_attr_init ,
|
|
.Nm pthread_attr_destroy ,
|
|
.Nm pthread_attr_setstack ,
|
|
.Nm pthread_attr_getstack ,
|
|
.Nm pthread_attr_setstacksize ,
|
|
.Nm pthread_attr_getstacksize ,
|
|
.Nm pthread_attr_setguardsize ,
|
|
.Nm pthread_attr_getguardsize ,
|
|
.Nm pthread_attr_setstackaddr ,
|
|
.Nm pthread_attr_getstackaddr ,
|
|
.Nm pthread_attr_setdetachstate ,
|
|
.Nm pthread_attr_getdetachstate ,
|
|
.Nm pthread_attr_setinheritsched ,
|
|
.Nm pthread_attr_getinheritsched ,
|
|
.Nm pthread_attr_setschedparam ,
|
|
.Nm pthread_attr_getschedparam ,
|
|
.Nm pthread_attr_setschedpolicy ,
|
|
.Nm pthread_attr_getschedpolicy ,
|
|
.Nm pthread_attr_setscope ,
|
|
.Nm pthread_attr_getscope
|
|
.Nd thread attribute operations
|
|
.Sh LIBRARY
|
|
.Lb libpthread
|
|
.Sh SYNOPSIS
|
|
.In pthread.h
|
|
.Ft int
|
|
.Fn pthread_attr_init "pthread_attr_t *attr"
|
|
.Ft int
|
|
.Fn pthread_attr_destroy "pthread_attr_t *attr"
|
|
.Ft int
|
|
.Fn pthread_attr_setstack "pthread_attr_t *attr" " void *stackaddr" "size_t stacksize"
|
|
.Ft int
|
|
.Fn pthread_attr_getstack "const pthread_attr_t * restrict attr" "void ** restrict stackaddr" "size_t * restrict stacksize"
|
|
.Ft int
|
|
.Fn pthread_attr_setstacksize "pthread_attr_t *attr" "size_t stacksize"
|
|
.Ft int
|
|
.Fn pthread_attr_getstacksize "const pthread_attr_t *restrict attr" "size_t *restrict stacksize"
|
|
.Ft int
|
|
.Fn pthread_attr_setguardsize "pthread_attr_t *attr" "size_t guardsize"
|
|
.Ft int
|
|
.Fn pthread_attr_getguardsize "const pthread_attr_t * restrict attr" "size_t * restrict guardsize"
|
|
.Ft int
|
|
.Fn pthread_attr_setstackaddr "pthread_attr_t *attr" "void *stackaddr"
|
|
.Ft int
|
|
.Fn pthread_attr_getstackaddr "const pthread_attr_t *attr" "void **stackaddr"
|
|
.Ft int
|
|
.Fn pthread_attr_setdetachstate "pthread_attr_t *attr" "int detachstate"
|
|
.Ft int
|
|
.Fn pthread_attr_getdetachstate "const pthread_attr_t *attr" "int *detachstate"
|
|
.Ft int
|
|
.Fn pthread_attr_setinheritsched "pthread_attr_t *attr" "int inheritsched"
|
|
.Ft int
|
|
.Fn pthread_attr_getinheritsched "const pthread_attr_t *restrict attr" "int *restrct inheritsched"
|
|
.Ft int
|
|
.Fn pthread_attr_setschedparam "pthread_attr_t *attr" "const struct sched_param *param"
|
|
.Ft int
|
|
.Fn pthread_attr_getschedparam "const pthread_attr_t *attr" "struct sched_param *param"
|
|
.Ft int
|
|
.Fn pthread_attr_setschedpolicy "pthread_attr_t *attr" "int policy"
|
|
.Ft int
|
|
.Fn pthread_attr_getschedpolicy "const pthread_attr_t *restrict attr" "int *restrict policy"
|
|
.Ft int
|
|
.Fn pthread_attr_setscope "pthread_attr_t *attr" "int contentionscope"
|
|
.Ft int
|
|
.Fn pthread_attr_getscope "const pthread_attr_t *restrict attr" "int *restrict contentionscope"
|
|
.Sh DESCRIPTION
|
|
Thread attributes are used to specify parameters to
|
|
.Fn pthread_create .
|
|
One attribute object can be used in multiple calls to
|
|
.Fn pthread_create ,
|
|
with or without modifications between calls.
|
|
.Pp
|
|
The
|
|
.Fn pthread_attr_init
|
|
function initializes
|
|
.Fa attr
|
|
with all the default thread attributes.
|
|
.Pp
|
|
The
|
|
.Fn pthread_attr_destroy
|
|
function destroys
|
|
.Fa attr .
|
|
.Pp
|
|
The
|
|
.Fn pthread_attr_set*
|
|
functions set the attribute that corresponds to each function name.
|
|
.Pp
|
|
The
|
|
.Fn pthread_attr_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
|
|
The
|
|
.Fn pthread_attr_init
|
|
function will fail if:
|
|
.Bl -tag -width Er
|
|
.It Bq Er ENOMEM
|
|
Out of memory.
|
|
.El
|
|
.Pp
|
|
The
|
|
.Fn pthread_attr_destroy
|
|
function will fail if:
|
|
.Bl -tag -width Er
|
|
.It Bq Er EINVAL
|
|
Invalid value for
|
|
.Fa attr .
|
|
.El
|
|
.Pp
|
|
The
|
|
.Fn pthread_attr_setstacksize
|
|
and
|
|
.Fn pthread_attr_setstack
|
|
functions will fail if:
|
|
.Bl -tag -width Er
|
|
.It Bq Er EINVAL
|
|
.Fa stacksize
|
|
is less than
|
|
.Dv PTHREAD_STACK_MIN .
|
|
.El
|
|
.Pp
|
|
The
|
|
.Fn pthread_attr_setdetachstate
|
|
function will fail if:
|
|
.Bl -tag -width Er
|
|
.It Bq Er EINVAL
|
|
Invalid value for
|
|
.Fa detachstate .
|
|
.El
|
|
.Pp
|
|
The
|
|
.Fn pthread_attr_setinheritsched
|
|
function will fail if:
|
|
.Bl -tag -width Er
|
|
.It Bq Er EINVAL
|
|
Invalid value for
|
|
.Fa attr .
|
|
.El
|
|
.Pp
|
|
The
|
|
.Fn pthread_attr_setschedparam
|
|
function will fail if:
|
|
.Bl -tag -width Er
|
|
.It Bq Er EINVAL
|
|
Invalid value for
|
|
.Fa attr .
|
|
.It Bq Er ENOTSUP
|
|
Invalid value for
|
|
.Fa param .
|
|
.El
|
|
.Pp
|
|
The
|
|
.Fn pthread_attr_setschedpolicy
|
|
function will fail if:
|
|
.Bl -tag -width Er
|
|
.It Bq Er EINVAL
|
|
Invalid value for
|
|
.Fa attr .
|
|
.It Bq Er ENOTSUP
|
|
Invalid or unsupported value for
|
|
.Fa policy .
|
|
.El
|
|
.Pp
|
|
The
|
|
.Fn pthread_attr_setscope
|
|
function will fail if:
|
|
.Bl -tag -width Er
|
|
.It Bq Er EINVAL
|
|
Invalid value for
|
|
.Fa attr .
|
|
.It Bq Er ENOTSUP
|
|
Invalid or unsupported value for
|
|
.Fa contentionscope .
|
|
.El
|
|
.Sh SEE ALSO
|
|
.Xr pthread_attr_affinity_np 3 ,
|
|
.Xr pthread_attr_get_np 3 ,
|
|
.Xr pthread_create 3
|
|
.Sh STANDARDS
|
|
.Fn pthread_attr_init ,
|
|
.Fn pthread_attr_destroy ,
|
|
.Fn pthread_attr_setstacksize ,
|
|
.Fn pthread_attr_getstacksize ,
|
|
.Fn pthread_attr_setstackaddr ,
|
|
.Fn pthread_attr_getstackaddr ,
|
|
.Fn pthread_attr_setdetachstate ,
|
|
and
|
|
.Fn pthread_attr_getdetachstate
|
|
functions conform to
|
|
.St -p1003.1-96
|
|
.Pp
|
|
The
|
|
.Fn pthread_attr_setinheritsched ,
|
|
.Fn pthread_attr_getinheritsched ,
|
|
.Fn pthread_attr_setschedparam ,
|
|
.Fn pthread_attr_getschedparam ,
|
|
.Fn pthread_attr_setschedpolicy ,
|
|
.Fn pthread_attr_getschedpolicy ,
|
|
.Fn pthread_attr_setscope ,
|
|
and
|
|
.Fn pthread_attr_getscope
|
|
functions conform to
|
|
.St -susv2
|