pthread_attr_setstackaddr(3)

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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
  attr	    Address of the thread attributes object whose stack address
	    attribute is to be modified.

  stackaddr New value for the address of the stack region of the thread
	    attributes object specified by attr.

  size	    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_setstackaddr(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_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:

  0	    Successful completion.

  [EINVAL]  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
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