pthread_attr_getguardsize(3)				     Library Functions Manual				      pthread_attr_getguardsize(3)

NAME

       pthread_attr_getguardsize - Obtains the guardsize attribute of the specified thread attributes object.

LIBRARY

       DECthreads POSIX 1003.1c Library (libpthread.so)

SYNOPSIS

       #include <pthread.h>

       int pthread_attr_getguardsize(
		       const pthread_attr_t  *attr,
		       size_t		     *guardsize);

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 guardsize attribute is obtained.  Receives the value of the guardsize attribute of the thread
       attributes object specified by attr.

DESCRIPTION

       This routine obtains the value of the guardsize attribute of the thread attributes object specified in the attr argument and stores  it	in
       the  location specified by the guardsize argument.  The specified attributes object must already be initialized at the time this routine is
       called.

       When creating a thread, use a thread attributes object to specify nondefault values for thread attributes.  The guardsize  attribute  of  a
       thread attributes object specifies the minimum size (in bytes) of the guard area for the stack of a new thread.

       A  guard  area can help a multithreaded program detect overflow of a thread's stack. A guard area is a region of no-access memory that DEC-
       threads allocates at the overflow end of the thread's stack. When any thread attempts to access a memory location  within  this	region,  a
       memory addressing violation occurs.

NOTES

       The  value  of  the  guardsize attribute of a particular thread attributes object does not necessarily correspond to the actual size of the
       guard area of any existing thread in your multithreaded program.

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 does not refer to an existing thread attributes object.

ERRORS

       None

RELATED INFORMATION

       Functions: 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

														      pthread_attr_getguardsize(3)