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pthread_attr_setstackaddr(3)
NAME
  pthread_attr_setstackaddr - Changes the stack address attribute of the
  specified thread attributes object

SYNOPSIS
  #include <pthread.h>

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

LIBRARY
  DECthreads POSIX 1003.1c Library (libpthread.so)

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

SEE ALSO
  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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