Libc-997.1.1.tar.gz

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

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-.\" Copyright (c) 2004-2007 Apple Inc. All rights reserved.
-.Dd December 31, 2007
-.Dt PTHREAD_ATTR 3
-.Os
-.Sh NAME
-.Nm pthread_attr_getstacksize ,
-.Nm pthread_attr_setstacksize
-.Nd thread attribute operations
-.Sh SYNOPSIS
-.Fd #include <pthread.h>
-.Ft int
-.Fo pthread_attr_getstacksize
-.Fa "const pthread_attr_t *restrict attr"
-.Fa "size_t *restrict stacksize"
-.Fc
-.Ft int
-.Fo pthread_attr_setstacksize
-.Fa "pthread_attr_t *attr"
-.Fa "size_t stacksize"
-.Fc
-.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 functions 
-.Fn pthread_attr_setstacksize
-and 
-.Fn pthread_attr_getstacksize , 
-respectively, set and get the size of the stack that is to be created for the new thread. The stack size attribute is set within the
-.Fa attr
-argument, which can subsequently be used as an argument to 
-.Fn pthread_create .
-.Sh RETURN VALUES
-If successful, these functions return 0.
-Otherwise, an error number is returned to indicate the error. 
-.Fn pthread_attr_getstacksize
-returns the stacksize attribute value in 
-.Fa stacksize 
-if successful.
-.Sh ERRORS
-.Fn pthread_attr_getstacksize
-will fail if:
-.Bl -tag -width Er
-.\" ========
-.It Bq Er EINVAL
-Invalid value for
-.Fa attr .
-.El
-.Pp
-.Fn pthread_attr_setstacksize
-will fail if:
-.Bl -tag -width Er
-.\" ========
-.It Bq Er EINVAL
-Invalid value for
-.Fa attr .
-.\" ========
-.It Bq Er EINVAL
-.Fa stacksize
-is less than
-.Dv PTHREAD_STACK_MIN .
-.\" ========
-.It Bq Er EINVAL
-.Fa stacksize
-is not a multiple of the system page size.
-.El
-.Sh SEE ALSO
-.Xr pthread_create 3 ,
-.Xr pthread_attr_init 3 ,
-.Xr pthread_attr_setstackaddr 3 
-.Sh STANDARDS
-.Fn pthread_attr_setstacksize ,
-.Fn pthread_attr_getstacksize 
-conform to
-.St -p1003.1-96