man/man3dat/dat_cno_free.3dat

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 This manual page is derived from the DAT/uDAPL 1.2 specification.
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 DAT_CNO_FREE 3DAT "Jul 16, 2004"
 NAME
dat_cno_free - destroy an instance of the CNO
 SYNOPSIS

cc [ flag.\|.\|. ] file.\|.\|. -ldat [ library.\|.\|. ]
#include <dat/udat.h>

DAT_RETURN
 dat_cno_free (
 IN DAT_CNO_HANDLE cno_handle
 )


 PARAMETERS
cno_handle

Handle for an instance of the CNO


 DESCRIPTION

The dat_cno_free() function destroys a specified instance of the CNO.

A CNO cannot be deleted while it is referenced by an Event Dispatcher or while
a thread is blocked on it.
 RETURN VALUES
DAT_SUCCESS

The operation was successful.


DAT_INVALID_HANDLE

The cno_handle() parameter is invalid.


DAT_INVALID_STATE

Parameter in an invalid state. CNO is in use by an EVD instance or there is a
thread blocked on it.


 USAGE

If there is a thread blocked in dat_cno_wait(3DAT), the Consumer can do
the following steps to unblock the waiter:


Create a temporary EVD that accepts software events. It can be created in
advance.


For a CNO with the waiter, attach that EVD to the CNO and post the software
event on the EVD.


This unblocks the CNO.


Repeat for other CNOs that have blocked waiters.


Destroy the temporary EVD after all CNOs are destroyed and the EVD is no longer
needed.

 ATTRIBUTES

See attributes(7) for descriptions of the following attributes:


ATTRIBUTE TYPE ATTRIBUTE VALUE
Interface Stability Standard: uDAPL, 1.1, 1.2
MT-Level Unsafe


 SEE ALSO

 dat_cno_wait (3DAT),  libdat (3LIB),  attributes (7)