thr_stksegment(3C)					   Standard C Library Functions 					thr_stksegment(3C)

NAME

       thr_stksegment - get thread stack address and size

SYNOPSIS

       cc -mt [ flag... ] file...[ library... ]
       #include <thread.h>
       #include <signal.h>

       int thr_stksegment(stack_t *ss);

DESCRIPTION

       The thr_stksegment() function returns, in its stack_t argument, the address and size of the calling thread's stack.

       The stack_t structure includes the following members:

	 void	*ss_sp
	 size_t ss_size
	 int	ss_flags

       On  successful  return  from  thr_stksegment(),	ss_sp contains the high address of the caller's stack and ss_size contains the size of the
       stack in bytes.	The ss_flags member is always 0. Note that the meaning of ss_sp is reversed from other uses of	stack_t  such  as  sigalt-
       stack(2) where ss_sp is the low address.

       The  stack  information	provided  by  thr_stksegment()	is typically used by debuggers, garbage collectors, and similar applications. Most
       applications should not require such information.

RETURN VALUES

       The  thr_stksegment() function returns  0 if the thread stack address and size were successfully retrieved.  Otherwise, it returns  a  non-
       zero error value.

ERRORS

       The  thr_stksegment() function will fail if:

       EAGAIN	  The  stack information for the thread is not available because the thread's initialization is not yet complete, or the thread is
		  an internal thread.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |MT-Safe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       sigaltstack(2), thr_create(3C), attributes(5)

SunOS 5.11							    15 Jun 2000 						thr_stksegment(3C)