pthread_attr_getstackaddr(3) [osf1 man page]

pthread_attr_getstackaddr(3)				     Library Functions Manual				      pthread_attr_getstackaddr(3)

NAME

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

LIBRARY

       DECthreads POSIX 1003.1c Library (libpthread.so)

SYNOPSIS

       #include <pthread.h>

       int pthread_attr_getstackaddr(
			const pthread_attr_t  *attr,
			void		      *stackaddr);

STANDARDS

       Interfaces documented on this reference page conform to industry standards 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 value of the stack address attribute of
       the thread attributes object specified by attr.

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.

NOTES

       The value of the stack address attribute of a particular thread attributes object does not necessarily correspond to the actual stack  ori-
       gin of any existing thread in your multithreaded program.

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.

ERRORS

       None

RELATED INFORMATION

       Functions:     pthread_attr_getguardsize(3),	pthread_attr_getstacksize(3),	  pthread_attr_init(3),      pthread_attr_setguardsize(3),
       pthread_attr_setstackaddr(3), pthread_attr_setstacksize(3), pthread_create(3)

       Manuals: Guide to DECthreads and Programmer's Guide

       delim off

														      pthread_attr_getstackaddr(3)

pthread_attr_setstackaddr(3)				     Library Functions Manual				      pthread_attr_setstackaddr(3)

NAME

       pthread_attr_setstackaddr - Changes the stack address and size of the specified thread attributes object.

LIBRARY

       DECthreads POSIX 1003.1c Library (libpthread.so)

SYNOPSIS

       #include <pthread.h>

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

STANDARDS

       Interfaces documented on this reference page conform to industry standards as follows:

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

PARAMETERS

       Address	of the thread attributes object whose stack address attribute is to be modified.  New value for 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 uses the values specified in the stackaddr and size arguments to set the base stack address and size of the thread	attributes
       object specified in the attr argument.

       When creating a thread, use a thread attributes object to specify nondefault values for thread attributes.  The default value for the stack
       address attribute of an initialized thread attributes object is NULL.

       Unlike pthread_attr_setstackaddr(3), this routine is a much more reliable portable interface.  With the	POSIX  standard  pthread_attr_set-
       stackaddr(3),  a  stack is specified using a single, undefined, address.  An implementation of the standard can only assume that the speci-
       fied 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_setstackaddr_np(3). Instead of specifying a stack address, you  specify  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

RELATED INFORMATION

       Functions: pthread_attr_getstackaddr_np(3)

       Manuals: Guide to DECthreads and Programmer's Guide delim off

														      pthread_attr_setstackaddr(3)