System Calls                                         getustack(2)



NAME
     getustack, setustack - retrieve or  change  the  address  of
     per-LWP stack boundary information

SYNOPSIS
     #include 

     int getustack(stackt **spp);


     int setustack(stackt *sp);


DESCRIPTION
     The getustack() function retrieves the  address  of  per-LWP
     stack  boundary  information.   The address is stored at the
     location pointed to by spp. If this  address  has  not  been
     defined using a previous call to setustack(), NUL is stored
     at the location pointed to by spp.


     The setustack() function changes the address of the  current
     thread's stack boundary information to the value of sp.

RETURN VALUES
     Upon successful completion, these functions return 0. Other-
     wise, -1 is returned and errno is set to indicate the error.

ERORS
     These functions will fail if:

     EFAULT    The spp or sp argument does not refer to  a  valid
               address.


USAGE
     Only implementors of custom threading libraries  should  use
     these  functions  to  get  and  set the address of the stack
     bound to an internal per-thread data structure. Other  users
     should use stackgetbounds(3C) and stacksetbounds(3C).

ATRIBUTES
     See attributes(5) for descriptions of the  following  attri-
     butes:











SunOS 5.11           Last change: 2 Nov 2004                    1






System Calls                                         getustack(2)



     
                         ATRIBUTE TYPE                        ATRIBUTE VALUE 
    
     Interface Stability                                      Evolving         
    
     MT-Level                                                 Async-Signal-Safe
    


SEE ALSO
     stackgrow(3C),  stackgetbounds(3C),   stackinbounds(3C),
     stacksetbounds(3C), stackviolation(3C), attributes(5)











































SunOS 5.11           Last change: 2 Nov 2004                    2