pthread_attr_getstackaddr_np(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_np(
		       const 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 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 reliable portable interface.  With the	POSIX  standard  pthread_attr_get-
       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_getstackaddr_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

RELATED INFORMATION

       Functions: pthread_attr_setstackaddr_np(3)

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

														      pthread_attr_getstackaddr(3)

PTHREAD_ATTR_SETSTACKADDR(3)				     Linux Programmer's Manual				      PTHREAD_ATTR_SETSTACKADDR(3)

NAME

       pthread_attr_setstackaddr, pthread_attr_getstackaddr - set/get stack address attribute in thread attributes object

SYNOPSIS

       #include <pthread.h>

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

       Compile and link with -pthread.

DESCRIPTION

       These functions are obsolete: do not use them.  Use pthread_attr_setstack(3) and pthread_attr_getstack(3) instead.

       The  pthread_attr_setstackaddr() function sets the stack address attribute of the thread attributes object referred to by attr to the value
       specified in stackaddr.	This attribute specifies the location of the stack that should be used by a  thread  that  is  created	using  the
       thread attributes object attr.

       stackaddr should point to a buffer of at least PTHREAD_STACK_MIN bytes that was allocated by the caller.  The pages of the allocated buffer
       should be both readable and writable.

       The pthread_attr_getstackaddr() function returns the stack address attribute of the thread attributes object referred to  by  attr  in  the
       buffer pointed to by stackaddr.

RETURN VALUE

       On success, these functions return 0; on error, they return a nonzero error number.

ERRORS

       No errors are defined (but applications should nevertheless handle a possible error return).

VERSIONS

       These functions are provided by glibc since version 2.1.

CONFORMING TO

       POSIX.1-2001 specifies these functions but marks them as obsolete.  POSIX.1-2008 removes the specification of these functions.

NOTES

       Do  not use these functions!  They cannot be portably used, since they provide no way of specifying the direction of growth or the range of
       the stack.  For example, on architectures with a stack that grows downwards, stackaddr specifies the next address past the highest  address
       of  the	allocated  stack  area.   However, on architectures with a stack that grows upwards, stackaddr specifies the lowest address in the
       allocated stack area.  By contrast, the stackaddr used by pthread_attr_setstack(3) and pthread_attr_getstack(3), is always a pointer to the
       lowest address in the allocated stack area (and the stacksize argument specifies the range of the stack).

SEE ALSO

       pthread_attr_init(3), pthread_attr_setstack(3), pthread_attr_setstacksize(3), pthread_create(3), pthreads(7)

COLOPHON

       This  page is part of release 3.25 of the Linux man-pages project.  A description of the project, and information about reporting bugs, can
       be found at http://www.kernel.org/doc/man-pages/.

Linux								    2008-10-24					      PTHREAD_ATTR_SETSTACKADDR(3)