184 lines
3.7 KiB
C
184 lines
3.7 KiB
C
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/*++
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Copyright (c) 1996-1997 Microsoft Corporation
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Module Name:
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notify.c
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Abstract:
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Interface for reporting resource notifications to cluster
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manager.
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Author:
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John Vert (jvert) 12-Jan-1996
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Revision History:
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--*/
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#include "resmonp.h"
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#define RESMON_MODULE RESMON_MODULE_NOTIFY
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//
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// Define queue to post notifications to
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//
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CL_QUEUE RmpNotifyQueue;
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//
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// Define notification block structure
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//
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typedef struct _NOTIFY {
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LIST_ENTRY ListEntry;
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RM_NOTIFY_KEY Key;
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NOTIFY_REASON Reason;
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CLUSTER_RESOURCE_STATE State;
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} NOTIFY, *PNOTIFY;
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BOOL
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s_RmNotifyChanges(
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IN handle_t IDL_handle,
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OUT RM_NOTIFY_KEY *lpNotifyKey,
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OUT DWORD *lpNotifyEvent,
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OUT DWORD *lpCurrentState
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)
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/*++
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Routine Description:
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This is a blocking RPC call which is used to implement notification.
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The client calls this API and blocks until a notification event
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occurs. Any notification events wake up the blocked thread and
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it returns to the client with the notification information.
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Arguments:
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IDL_handle - Supplies binding handle, currently unused
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lpNotifyKey - Returns the notification key of the resource
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lpCurrentState - Returns the current state of the resource
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Return Value:
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TRUE - A notification event was successfully delivered
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FALSE - No notification events were delivered, the process is
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shutting down.
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--*/
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{
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PLIST_ENTRY ListEntry;
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PNOTIFY Notify;
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DWORD Status;
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BOOL Continue;
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//
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// Wait for something to be posted to the queue, pull it off, and
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// return it.
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//
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ListEntry = ClRtlRemoveHeadQueue(&RmpNotifyQueue);
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if ( ListEntry == NULL ) {
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// If we got nothing - assume we are shutting down!
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return(FALSE);
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}
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Notify = CONTAINING_RECORD(ListEntry,
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NOTIFY,
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ListEntry);
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if (Notify->Reason == NotifyShutdown) {
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//
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// System is shutting down.
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//
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RmpFree(Notify);
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ClRtlLogPrint( LOG_NOISE, "[RM] NotifyChanges shutting down.\n");
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return(FALSE);
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}
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//
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// Return to the client with the notification data
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//
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*lpNotifyKey = Notify->Key;
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*lpNotifyEvent = Notify->Reason;
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*lpCurrentState = Notify->State;
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RmpFree(Notify);
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return(TRUE);
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} // RmNotifyChanges
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VOID
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RmpPostNotify(
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IN PRESOURCE Resource,
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IN NOTIFY_REASON Reason
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)
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/*++
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Routine Description:
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Posts a notification block to the notify queue.
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Arguments:
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Resource - Supplies the resource to post the notification for
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Reason - Supplies the reason for the notification.
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Return Value:
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None.
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--*/
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{
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PNOTIFY Notify;
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Notify = RmpAlloc(sizeof(NOTIFY));
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if (Notify != NULL) {
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Notify->Reason = Reason;
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switch ( Reason ) {
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case NotifyResourceStateChange:
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Notify->Key = Resource->NotifyKey;
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Notify->State = Resource->State;
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break;
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case NotifyResourceResuscitate:
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Notify->Key = Resource->NotifyKey;
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Notify->State = 0;
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break;
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case NotifyShutdown:
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Notify->Key = 0;
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Notify->State = 0;
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break;
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default:
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Notify->Key = 0;
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Notify->State = 0;
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}
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ClRtlInsertTailQueue(&RmpNotifyQueue, &Notify->ListEntry);
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} else {
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//
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// The notification will get dropped on the floor, but there's
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// not too much we can do about it anyway.
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//
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ClRtlLogPrint( LOG_ERROR, "[RM] RmpPostNotify dropped notification for %1!ws!, reason %2!u!\n",
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Resource->ResourceName,
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Reason);
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CL_UNEXPECTED_ERROR(ERROR_NOT_ENOUGH_MEMORY);
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}
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} // RmpPostNotify
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