118 lines
3.6 KiB
Groff
118 lines
3.6 KiB
Groff
.\" Copyright (c) 2002,2003 Alexey Zelkin <phantom@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, 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.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
|
|
.\"
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.Dd January 31, 2003
|
|
.Dt PTHREAD_ATTR_GET_NP 3
|
|
.Os
|
|
.Sh NAME
|
|
.Nm pthread_attr_get_np
|
|
.Nd get attributes of existent thread
|
|
.Sh LIBRARY
|
|
.Lb libpthread
|
|
.Lb libthr
|
|
.Sh SYNOPSIS
|
|
.In pthread_np.h
|
|
.Ft int
|
|
.Fn pthread_attr_get_np "pthread_t pid" "pthread_attr_t *dst"
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Fn pthread_attr_get_np
|
|
function is used to get existent thread's attributes.
|
|
Most fields of
|
|
.Vt pthread_attr_t
|
|
structure are exact values of attributes provided at thread creation
|
|
time (as parameter to
|
|
.Xr pthread_create 3
|
|
function), except for the stack address.
|
|
.Pp
|
|
Value returned as
|
|
.Fa dst
|
|
is supposed to be used in conjunction with
|
|
.Fn pthread_attr_get*
|
|
functions to retrieve individual values from
|
|
.Vt pthread_attr_t
|
|
structure.
|
|
Parameter
|
|
.Fa dst
|
|
should point to allocated memory area big enough to fit this structure.
|
|
.Pp
|
|
It is HIGHLY RECOMMENDED to use
|
|
.Xr pthread_attr_init 3
|
|
function to allocate attribute storage.
|
|
.Sh IMPLEMENTATION NOTES
|
|
The
|
|
.Fn pthread_attr_get_np
|
|
function will always return a pointer to the thread's real stack address,
|
|
regardless of its value in the original attributes structure.
|
|
.Sh RETURN VALUES
|
|
If successful,
|
|
.Fn pthread_attr_get_np
|
|
function returns 0.
|
|
Otherwise, an error number is returned to indicate the error.
|
|
.Sh EXAMPLES
|
|
.Bd -literal
|
|
size_t
|
|
my_thread_stack_size(pthread_t pid)
|
|
{
|
|
pthread_attr_t attr;
|
|
size_t size;
|
|
|
|
pthread_attr_init(&attr);
|
|
pthread_attr_get_np(pid, &attr);
|
|
pthread_attr_getstacksize(&attr, &size);
|
|
pthread_attr_destroy(&attr);
|
|
return(size);
|
|
}
|
|
.Ed
|
|
.Sh ERRORS
|
|
The
|
|
.Fn pthread_attr_get_np
|
|
function will fail if:
|
|
.Bl -tag -width Er
|
|
.It Bq Er EINVAL
|
|
Invalid value for one of given parameters.
|
|
.It Bq Er ESRC
|
|
No thread could be found corresponding to that specified by the given
|
|
thread ID.
|
|
.El
|
|
.Sh SEE ALSO
|
|
.Xr pthread_attr_destroy 3 ,
|
|
.Xr pthread_attr_getdetachstate 3 ,
|
|
.Xr pthread_attr_getinheritsched 3 ,
|
|
.Xr pthread_attr_getschedparam 3 ,
|
|
.Xr pthread_attr_getschedpolicy 3 ,
|
|
.Xr pthread_attr_getscope 3 ,
|
|
.Xr pthread_attr_getstack 3 ,
|
|
.Xr pthread_attr_getstackaddr 3 ,
|
|
.Xr pthread_attr_getstacksize 3 ,
|
|
.Xr pthread_attr_init 3
|
|
.Sh AUTHORS
|
|
The
|
|
.Fn pthread_attr_get_np
|
|
function and this manual page were written by
|
|
.An Alexey Zelkin
|
|
.Aq phantom@FreeBSD.org .
|