pthread_attr_getstackaddr_np man page on DigitalUNIX

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pthread_attr_getstackaddr(3)			  pthread_attr_getstackaddr(3)

NAME
       pthread_attr_getstackaddr  - Obtains the stack address attribute of the
       specified thread attributes object

SYNOPSIS
       #include <pthread.h>

       int pthread_attr_getstackaddr_np(
	       const pthread_attr_t *attr,
	       void **stackaddr,
	       size_t *size );

LIBRARY
       DECthreads POSIX 1003.1c Library (libpthread.so)

STANDARDS
       Interfaces documented on this reference page conform to industry	 stan‐
       dards as follows:

       IEEE Std 1003.1c-1995, POSIX System Application Program Interface

PARAMETERS
       Address	of  the thread attributes object whose stack address attribute
       is obtained.  Receives the address of the stack region  of  the	thread
       attributes  object  specified by attr.  The size of the stack region in
       bytes.

DESCRIPTION
       This routine obtains the value of the stack address  attribute  of  the
       thread  attributes  object specified in the attr argument and stores it
       in the location specified by  the  stackaddr  argument.	The  specified
       attributes  object must already be initialized at the time this routine
       is called.

       The stack address attribute of a thread attributes object points to the
       origin of the stack for a new thread.

       Unlike  pthread_attr_getstackaddr(3), this routine is a much more reli‐
       able portable interface. With the POSIX standard pthread_attr_getstack‐
       addr(3),	 a  stack  is specified using a single, undefined, address. An
       implementation of the standard can only assume that the specified value
       represents  the value to which the thread's stack pointer should be set
       when beginning execution.  However, this requires  the  application  to
       know  how  the  machine	uses the stack.	 For example, a stack may grow
       either up (to higher addresses) or down (to lower addresses),  and  may
       be decreased (or increased) either before or after storing a new value.

       DECthreads  provides  an	 alternative  interface with pthread_attr_get‐
       stackaddr_np(3). Instead of returning a stack address, it  returns  the
       base (lowest) address and the size.

RETURN VALUES
       If  an  error  condition	 occurs, this routine returns an integer value
       indicating the type of error. Possible return values  are  as  follows:
       Successful  completion.	 The  value  specified	by attr is not a valid
       thread attributes object.

ERRORS
       None

SEE ALSO
       Functions: pthread_attr_setstackaddr_np(3)

       Manuals: Guide to DECthreads and Programmer's Guide

						  pthread_attr_getstackaddr(3)
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