Content-type: text/html Man page of pthread_attr_setstackaddr

pthread_attr_setstackaddr

Section: C Library Functions (3)
Index Return to Main Contents
 

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

Address of the thread attributes object whose stack address attribute is to be modified. 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: 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 delim off


 

Index

NAME
LIBRARY
SYNOPSIS
STANDARDS
PARAMETERS
DESCRIPTION
NOTES
RETURN VALUES
ERRORS
RELATED INFORMATION

This document was created by man2html, using the manual pages.
Time: 02:41:35 GMT, October 02, 2010