1.\" Copyright (c) 2002 Alexey Zelkin <phantom@FreeBSD.org> 2.\" All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 13.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23.\" SUCH DAMAGE. 24.\" 25.\" $FreeBSD$ 26.\" 27.Dd October 26, 2002 28.Dt PTHREAD_ATTR_GET_NP 3 29.Os 30.Sh NAME 31.Nm pthread_attr_get_np 32.Nd get attributes of existent thread 33.Sh LIBRARY 34.Lb libc_r 35.Sh SYNOPSIS 36.In pthread_np.h 37.Ft int 38.Fn pthread_attr_get_np "pthread_t pid" "pthread_attr_t *dst" 39.Sh DESCRIPTION 40The 41.Fn pthread_attr_get_np 42function is used to get existent thread's attributes. 43Value returned as 44.Fa dst 45is supposed to be used in conjunction with 46.Fn pthread_attr_get* 47functions to retrieve individual values from 48.Vt pthread_attr_t 49structure. 50Parameter 51.Fa dst 52should point to allocated memory area big enough to fit this structure. 53It is HIGHLY RECOMMENDED to use 54.Xr pthread_attr_init 3 55function to allocate attribute storage. 56.Sh EXAMPLES 57.Bd -literal 58size_t 59my_thread_stack_size(pthread_t pid) 60{ 61 pthread_attr_t attr; 62 size_t size; 63 64 pthread_attr_init(&attr); 65 pthread_attr_get_np(pid, &attr); 66 pthread_attr_getstacksize(&attr, &size); 67 pthread_attr_destroy(&attr); 68 return(size); 69} 70.Ed 71.Sh RETURN VALUES 72If successful, 73.Fn pthread_attr_get_np 74function returns 0. 75Otherwise, an error number is returned to indicate the error. 76.Sh ERRORS 77.Fn pthread_attr_get_np 78will fail if: 79.Bl -tag -width Er 80.It Bq Er EINVAL 81Invalid value for one of given parameters. 82.It Bq Er ESRC 83No thread could be found corresponding to that specified by the given 84thread ID. 85.El 86.Sh SEE ALSO 87.Xr pthread_attr_destroy 3 , 88.Xr pthread_attr_getdetachstate 3 , 89.Xr pthread_attr_getinheritsched 3 , 90.Xr pthread_attr_getschedparam 3 , 91.Xr pthread_attr_getschedpolicy 3 , 92.Xr pthread_attr_getscope 3 , 93.Xr pthread_attr_getstackaddr 3 , 94.Xr pthread_attr_getstacksize 3 , 95.Xr pthread_attr_init 3 96