rsm_memseg_get_pollfd(3rsm) [sunos man page]

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)

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

NAME

       rsm_intr_signal_post, rsm_intr_signal_wait - signal or wait for an event

SYNOPSIS

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

       int rsm_intr_signal_post(void *memseg, uint_t flags);

       int rsm_intr_signal_wait(void *memseg, int timeout);

DESCRIPTION

       The  rsm_intr_signal_post() and	rsm_intr_signal_wait() functions are event functions that allow synchronization between importer processes
       and exporter processes.	A process may block to wait for an event occurance by calling rsm_intr_signal_wait(). A process can signal a wait-
       ing process when an event occurs by calling rsm_intr_signal_post().

       The  rsm_intr_signal_post()  function signals an event occurance. Either an import segment handle (rsm_memseg_import_handle_t) or an export
       segment handle (rsm_memseg_export_handle_t) may be type cast to a void pointer for the memseg argument. If memseg refers to an import  han-
       dle, the exporting process is signalled. If memseg refers to an export handle, all importers of that segment are signalled. The flags argu-
       ment may be set to RSM_SIGPOST_NO_ACCUMULATE; this will cause this event to be discarded if an event is already pending for the target seg-
       ment.

       The  rsm_intr_signal_wait()  function  allows a process to block and wait for an event occurance. Either an import segment handle (rsm_mem-
       seg_import_handle_t) or an export segment handle (rsm_memseg_export_handle_t) may be type cast to a void pointer for the  memseg  argument.
       The  process  blocks  for  up  to timeout milliseconds for an event to occur; if the timeout value is -1, the process blocks until an event
       occurs or until interrupted.

RETURN VALUES

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

ERRORS

       The rsm_intr_signal_post() and  rsm_intr_signal_wait() functions can return the following error:

       RSMERR_BAD_SEG_HNDL     Invalid segment handle.

       The rsm_intr_signal_post() function can return the following error:

       RSMERR_CONN_ABORTED

	   Connection aborted.

       RSMERR_REMOTE_NODE_UNREACHABL

	   Remote node not reachable.

       The rsm_intr_signal_wait() function can return the following errors:

       RSMERR_INTERRUPTED     Wait interrupted.

       RSMERR_TIMEOUT	      Timer expired.

ATTRIBUTES

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

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

SEE ALSO

       rsm_memseg_get_pollfd(3RSM), attributes(5)

SunOS 5.11							    7 Nov 2002						rsm_intr_signal_post(3RSM)