Note
Access to this page requires authorization. You can try signing in or changing directories.
Access to this page requires authorization. You can try changing directories.
The current APPC implementation in Host Integration Server supports conversations with synclevel of AP_NONE, AP_CONFIRM_SYNC_LEVEL, or AP_SYNCPT. The DEALLOCATE, MC_DEALLOCATE, PREPARE_TO_RECEIVE, and MC_PREPARE_TO_RECEIVE verbs specify a type member indicating the synchronization level required. This parameter is interpreted as follows:
| Allocated synclevel | Type specified | Action performed |
|---|---|---|
| AP_NONE | AP_FLUSH | Action of FLUSH or MC_FLUSH verb before deallocation or change of direction. |
| AP_NONE | AP_SYNCLEVEL | Action of FLUSH or MC_FLUSH verb before deallocation or change of direction. |
| AP_SYNCPT | AP_FLUSH | Action of FLUSH or MC_FLUSH verb before deallocation or change of direction. |
| AP_SYNCPT or AP_CONFIRM_SYNC_LEVEL | AP_CONFIRM_TYPE | Action of CONFIRM or MC_CONFIRM verb before deallocation or change of direction. |
| AP_SYNCPT | AP_SYNCLEVEL | It is assumed that a Sync Point implementation built using the APPC API in Host Integration Server implements the defer states appropriately. See the note below. |
Note
With an allocated synclevel of AP_SYNCPT and a specified type of AP_SYNCLEVEL, it is assumed that a vendor-supplied Sync Point component implements the defer states appropriately. A vendor-supplied Sync Point system must:
Intercept DEALLOCATE, MC_DEALLOCATE, PREPARE_TO_RECEIVE, and MC_PREPARE_TO_RECEIVE verbs on Sync Point Level 2 conversations when type AP_SYNCLEVEL is specified for synclevel.
Maintain the defer state until one of the verbs valid in that state completes.
On completion of the verb, issue the original DEALLOCATE, MC_DEALLOCATE, PREPARE_TO_RECEIVE, or MC_PREPARE_TO_RECEIVE verb to Host Integration Server.
Host Integration Server does not implement the defer states directly. In particular, when a DEALLOCATE, MC_DEALLOCATE, PREPARE_TO_RECEIVE, or MC_PREPARE_TO_RECEIVE verb is received with a type specified as AP_SYNCLEVEL on a Sync Point conversation, this is treated as if the conversation has a synclevel of AP_NONE.
So that Sync Point Level 2 conversations can use confirm type synchronization, the DEALLOCATE, MC_DEALLOCATE, PREPARE_TO_RECEIVE, and MC_PREPARE_TO_RECEIVE verbs are modified to support a type member of AP_CONFIRM_TYPE.
The DEALLOCATE, MC_DEALLOCATE, PREPARE_TO_RECEIVE, and MC_PREPARE_TO_RECEIVE verbs specify a type member indicating the synchronization level required. This parameter is interpreted as follows:
| Allocated synclevel | Type specified | Action performed |
|---|---|---|
| AP_NONE | AP_FLUSH | Action of FLUSH or MC_FLUSH verb before deallocation or change of direction. |
| AP_NONE | AP_SYNCLEVEL | Action of FLUSH or MC_FLUSH verb before deallocation or change of direction. |
| AP_CONFIRM_SYNC_LEVEL | AP_FLUSH | Action of FLUSH or MC_FLUSH verb before deallocation or change of direction. |
| AP_CONFIRM_SYNC_LEVEL | AP_SYNCLEVEL | Action of CONFIRM or MC_CONFIRM verb before deallocation or change of direction. |