Changeset 31453 in vbox for trunk/src/VBox/Runtime/r3/win

Timestamp:

Aug 8, 2010 1:30:35 PM (15 years ago)

Author:

vboxsync

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

64526

Message:

Runtime/poll: Add a method to change the events to poll for without removing and adding the source again

File:

• trunk/src/VBox/Runtime/r3/win/poll-win.cpp (modified) (1 diff)

trunk/src/VBox/Runtime/r3/win/poll-win.cpp

@@ -552 +552 @@
 }
 
+RTDECL(int) RTPollSetEventsChange(RTPOLLSET hPollSet, uint32_t id, uint32_t fEvents)
+{
+    /*
+     * Validate the input.
+     */
+    RTPOLLSETINTERNAL *pThis = hPollSet;
+    AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
+    AssertReturn(pThis->u32Magic == RTPOLLSET_MAGIC, VERR_INVALID_HANDLE);
+    AssertReturn(id != UINT32_MAX, VERR_INVALID_PARAMETER);
+    AssertReturn(!(fEvents & ~RTPOLL_EVT_VALID_MASK), VERR_INVALID_PARAMETER);
+    AssertReturn(fEvents, VERR_INVALID_PARAMETER);
+
+    /*
+     * Set the busy flag and do the job.
+     */
+    AssertReturn(ASMAtomicCmpXchgBool(&pThis->fBusy, true,  false), VERR_CONCURRENT_ACCESS);
+
+    int         rc = VERR_POLL_HANDLE_ID_NOT_FOUND;
+    uint32_t    i  = pThis->cHandles;
+    while (i-- > 0)
+        if (pThis->paHandles[i].id == id)
+        {
+            pThis->aHandles[i].fEvents = fEvents;
+            rc = VINF_SUCCESS;
+            break;
+        }
+
+    ASMAtomicWriteBool(&pThis->fBusy, false);
+    return rc;
+}
+
+