1dat_cno_wait(3DAT) Direct Access Transport Library Functionsdat_cno_wait(3DAT)
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6 dat_cno_wait - wait for notification events
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9 cc [ flag... ] file... -ldat [ library... ]
10 #include <dat/udat.h>
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12 DAT_RETURN
13 dat_cno_wait (
14 IN DAT_CNO_HANDLE cno_handle,
15 IN DAT_TIMEOUT timeout,
16 OUT DAT_EVD_HANDLE *evd_handle
17 )
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21 cno_handle Handle for an instance of CNO
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24 timeout The duration to wait for a notification. The value
25 DAT_TIMEOUT_INFINITE can be used to wait indefinitely.
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28 evd_handle Handle for an instance of EVD
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32 The dat_cno_wait() function allows the Consumer to wait for notifica‐
33 tion events from a set of Event Dispatchers all from the same Interface
34 Adapter. The Consumer blocks until notified or the timeout period
35 expires.
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38 An Event Dispatcher that is disabled or in the "Waited" state does not
39 deliver notifications. A uDAPL Consumer waiting directly upon an Event
40 Dispatcher preempts the CNO.
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43 The consumer can optionally specify a timeout, after which it is
44 unblocked even if there are no notification events. On a timeout,
45 evd_handle is explicitly set to a null handle.
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48 The returned evd_handle is only a hint. Another Consumer can reap the
49 Event before this Consumer can get around to checking the Event Dis‐
50 patcher. Additionally, other Event Dispatchers feeding this CNO might
51 have been notified. The Consumer is responsible for ensuring that all
52 EVDs feeding this CNO are polled regardless of whether they are identi‐
53 fied as the immediate cause of the CNO unblocking.
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56 All the waiters on the CNO, including the OS Wait Proxy Agent if it is
57 associated with the CNO, are unblocked with the NULL handle returns for
58 an unblocking EVD evd_handle when the IA instance is destroyed or when
59 all EVDs the CNO is associated with are freed.
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62 DAT_SUCCESS The operation was successful.
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65 DAT_INVALID_HANDLE The cno_handle parameter is invalid.
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68 DAT_QUEUE_EMPTY The operation timed out without a notifica‐
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72 DAT_INVALID_PARAMETER One of the parameters was invalid or out of
73 range, a combination of parameters was
74 invalid, or the timeout parameter is invalid.
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77 DAT_INTERRUPTED_CALL The operation was interrupted by a signal.
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81 See attributes(5) for descriptions of the following attributes:
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86 ┌─────────────────────────────┬─────────────────────────────┐
87 │ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
88 ├─────────────────────────────┼─────────────────────────────┤
89 │Interface Stability │Standard: uDAPL, 1.1, 1.2 │
90 ├─────────────────────────────┼─────────────────────────────┤
91 │MT-Level │Safe │
92 └─────────────────────────────┴─────────────────────────────┘
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95 libdat(3LIB), attributes(5)
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99SunOS 5.11 16 Jul 2004 dat_cno_wait(3DAT)