rsm_memseg_get_pollfd(3RSM)			      Remote Shared Memory Library Functions			       rsm_memseg_get_pollfd(3RSM)

NAME

       rsm_memseg_get_pollfd, rsm_memseg_release_pollfd - get or release a poll descriptor

SYNOPSIS

       cc [ flag... ] file... -lrsm [ library... ]
       #include <rsmapi.h>

       int rsm_memseg_get_pollfd(void *memseg, struct pollfd *fd);

       int rsm_memseg_release_pollfd(void *memseg);

DESCRIPTION

       The  rsm_memseg_get_pollfd()  and  rsm_memseg_release_pollfd()  functions provide an alternative to rsm_intr_signal_wait(3RSM). The waiting
       process can multiplex event waiting using the poll(2) function after first obtaining a poll descriptor using  rsm_memseg_get_pollfd().  The
       descriptor can subsequently be released using rsm_memseg_release_pollfd().

       As  a  result  of a call rsm_memseg_get_pollfd(), the specified pollfd structure is initialized with a descriptor for the specified segment
       (memseg) and the event generated by rsm_intr_signal_post(3RSM). Either an export segment handle or an import segment  handle  can  be  type
       cast  to  a  void pointer. The pollfd argument can subsequently be used with the rsm_intr_signal_wait_pollfd(3RSM) function to wait for the
       event; it cannot be used with poll(). If memseg references an export segment, the segment must be currently published.	If  memseg  refer-
       ences an import segment, the segment must be connected.

       The  rsm_memseg_reslease_pollfd() function decrements the reference count of the pollfd structure associated with the specified segment.  A
       segment unpublish, destroy or unmap operation will fail if the reference count is non-zero.

RETURN VALUES

       Upon successful completion, these functions return 0.  Otherwise, an error value is returned to indicate the error.

ERRORS

       The rsm_memseg_get_pollfd() and rsm_memseg_release_pollfd() function can return the following error:

       RSMERR_BAD_SEG_HNDL     Invalid segment handle.

ATTRIBUTES

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

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Evolving			   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |MT-Safe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       poll(2), rsm_intr_signal_post(3RSM), rsm_intr_signal_wait_pollfd(3RSM), attributes(5)

SunOS 5.10							    1 Dec 2002					       rsm_memseg_get_pollfd(3RSM)