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pthread_attr_setstackaddr(3)
NAME
  pthread_attr_setstackaddr - Changes 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_setstackaddr(
		   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
  attr	    Address of the thread attributes object whose stack address
	    attribute is to be modified.

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

DESCRIPTION
  This routine uses the value specified in the stackaddr argument to set the
  stack address attribute 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 stack address attribute of a
  thread attributes object points to the origin of the stack for a new
  thread.

  The default value for the stack address attribute of an initialized thread
  attributes object is NULL.

  For your program to calculate a value for the stackaddr attribute, note
  that:

    ·  Your program must allocate the memory that will be used for the new
       thread's stack.

    ·  On Tru64 UNIX, to create a new thread using a thread attributes
       object, the stackaddr attribute must be an address that points to the
       high-memory end of the memory region allocated for the stack. This
       address must point to the highest even-boundary quadword in the
       allocated memory region.
  Also note that:

    ·
  If you use the pthread_attr_setstackaddr(3) routine to set a thread
  attributes object's stack address attribute and use that attributes object
  to create a new thread, DECthreads ignores the attributes object's
  guardsize attribute and provides no thread stack guard area for the new
  thread.

    ·
  If you use the same thread attributes object to create more than one thread
  and each created thread uses a nondefault stack address, you must use the
  pthread_attr_setstackaddr(3) routine to set a unique stack address
  attribute value for each new thread created using that attributes object.

NOTES
  Correct use of this routine depends upon details of the target platform's
  stack architecture.  Thus, this routine cannot be used in a portable
  manner.

  The size of the stack must be at least PTHREAD_STACK_MIN bytes (see
  pthread.h).  However, because DECthreads must use a portion of this stack
  memory to begin thread execution and to maintain thread state, your
  program's "user thread code" cannot rely on using all of the stack memory
  allocated.

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.

ERRORS
  None

RELATED INFORMATION
  Functions: pthread_attr_getguardsize(3), pthread_attr_getstackaddr(3),
  pthread_attr_getstacksize(3), pthread_attr_init(3),
  pthread_attr_setguardsize(3), pthread_attr_setstacksize(3),
  pthread_create(3)

  Manuals: Guide to DECthreads and Programmer's Guide

Index for Section 3

Alphabetical listing for P

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