Changeset 85985 in vbox

Timestamp:

Sep 1, 2020 5:46:22 PM (5 years ago)

Author:

vboxsync

svn:sync-xref-src-repo-rev:

140181

Message:

Shared Clipboard/Host Service: Automatically unregister event if it has no (more) references in ShClSvcGuestDataReceived(). bugref:9437

Location:

trunk

Files:

trunk/include/VBox/GuestHost/SharedClipboard.h

r83624	r85985
175	175	SHCLEVENTID ShClEventIdGenerateAndRegister(PSHCLEVENTSOURCE pSource);
176	176	SHCLEVENTID ShClEventGetLast(PSHCLEVENTSOURCE pSource);
	177	uint32_t ShClEventGetRefs(PSHCLEVENTSOURCE pSource, SHCLEVENTID idEvent);
177	178	uint32_t ShClEventRetain(PSHCLEVENTSOURCE pSource, SHCLEVENTID idEvent);
178	179	uint32_t ShClEventRelease(PSHCLEVENTSOURCE pSource, SHCLEVENTID idEvent);

-              r85864
+              r85985
         return pEvent->idEvent;
+    return 0;
+}
+/**
+ * Returns the current reference count for a specific event.
+ *
+ * @returns Reference count.
+ * @param   pSource             Event source the specific event is part of.
+ * @param   idEvent             Event ID to return reference count for.
+ */
+uint32_t ShClEventGetRefs(PSHCLEVENTSOURCE pSource, SHCLEVENTID idEvent)
+{
+    PSHCLEVENT pEvent = shclEventGet(pSource, idEvent);
+    if (pEvent)
+        return pEvent->cRefs;
+    AssertMsgFailed(("No event with %RU32\n", idEvent));
     return 0;
+}

-              r85983
+              r85985
         if (RT_FAILURE(rc))
             ShClPayloadFree(pPayload);
+        /* No one holding a reference to the event event anymore? Unregister it. */
+        if (ShClEventGetRefs(&pClient->EventSrc, idEvent) == 0)
+        {
+            int rc2 = ShClEventUnregister(&pClient->EventSrc, idEvent);
+            if (RT_SUCCESS(rc))
+                rc = rc2;
+        }
+    }

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