/*
Called from IntDereferenceThreadInfo.
*/
VOID
FASTCALL
UserDeleteW32Thread(PTHREADINFO pti)
{
if (!pti->RefCount)
{
TRACE_CH(UserThread,"UserDeleteW32Thread pti 0x%p\n",pti);
if (pti->hEventQueueClient != NULL)
ZwClose(pti->hEventQueueClient);
pti->hEventQueueClient = NULL;
/* Free the message queue */
if (pti->MessageQueue)
{
MsqDestroyMessageQueue(pti);
}
MsqCleanupThreadMsgs(pti);
IntSetThreadDesktop(NULL, TRUE);
PsSetThreadWin32Thread(pti->pEThread, NULL, pti);
ExFreePoolWithTag(pti, USERTAG_THREADINFO);
}
}
NTSTATUS FASTCALL
UserAttachThreadInput(PTHREADINFO ptiFrom, PTHREADINFO ptiTo, BOOL fAttach)
{
MSG msg;
PATTACHINFO pai;
/* Can not be the same thread. */
if (ptiFrom == ptiTo) return STATUS_INVALID_PARAMETER;
/* Do not attach to system threads or between different desktops. */
if (ptiFrom->TIF_flags & TIF_DONTATTACHQUEUE ||
ptiTo->TIF_flags & TIF_DONTATTACHQUEUE ||
ptiFrom->rpdesk != ptiTo->rpdesk)
return STATUS_ACCESS_DENIED;
/* MSDN Note:
Keyboard and mouse events received by both threads are processed by the thread specified by the idAttachTo.
*/
/* If Attach set, allocate and link. */
if (fAttach)
{
pai = ExAllocatePoolWithTag(PagedPool, sizeof(ATTACHINFO), USERTAG_ATTACHINFO);
if (!pai) return STATUS_NO_MEMORY;
pai->paiNext = gpai;
pai->pti1 = ptiFrom;
pai->pti2 = ptiTo;
gpai = pai;
paiCount++;
ERR("Attach Allocated! ptiFrom 0x%p ptiTo 0x%p paiCount %d\n",ptiFrom,ptiTo,paiCount);
if (ptiTo->MessageQueue != ptiFrom->MessageQueue)
{
ptiTo->MessageQueue->iCursorLevel -= ptiFrom->iCursorLevel;
// FIXME: conditions?
if (ptiTo->MessageQueue == gpqForeground)
{
ERR("ptiTo is Foreground\n");
}
else
{
ERR("ptiTo NOT Foreground\n");
}
if (ptiFrom->MessageQueue == gpqForeground)
{
ERR("ptiFrom is Foreground\n");
ptiTo->MessageQueue->spwndActive = ptiFrom->MessageQueue->spwndActive;
ptiTo->MessageQueue->spwndFocus = ptiFrom->MessageQueue->spwndFocus;
ptiTo->MessageQueue->CursorObject = ptiFrom->MessageQueue->CursorObject;
ptiTo->MessageQueue->spwndCapture = ptiFrom->MessageQueue->spwndCapture;
ptiTo->MessageQueue->QF_flags ^= ((ptiTo->MessageQueue->QF_flags ^ ptiFrom->MessageQueue->QF_flags) & QF_CAPTURELOCKED);
ptiTo->MessageQueue->CaretInfo = ptiFrom->MessageQueue->CaretInfo;
IntSetFocusMessageQueue(NULL);
IntSetFocusMessageQueue(ptiTo->MessageQueue);
gptiForeground = ptiTo;
}
else
{
ERR("ptiFrom NOT Foreground\n");
}
MsqDestroyMessageQueue(ptiFrom);
ptiFrom->MessageQueue = ptiTo->MessageQueue;
ptiFrom->MessageQueue->cThreads++;
ERR("ptiTo S Share count %d\n", ptiFrom->MessageQueue->cThreads);
IntReferenceMessageQueue(ptiTo->MessageQueue);
}
else
{
ERR("Attach Threads are already associated!\n");
}
}
else /* If clear, unlink and free it. */
{
BOOL Hit = FALSE;
PATTACHINFO *ppai;
if (!gpai) return STATUS_INVALID_PARAMETER;
/* Search list and free if found or return false. */
ppai = &gpai;
while (*ppai != NULL)
{
if ( (*ppai)->pti2 == ptiTo && (*ppai)->pti1 == ptiFrom )
{
pai = *ppai;
/* Remove it from the list */
*ppai = (*ppai)->paiNext;
ExFreePoolWithTag(pai, USERTAG_ATTACHINFO);
paiCount--;
Hit = TRUE;
break;
}
ppai = &((*ppai)->paiNext);
}
if (!Hit) return STATUS_INVALID_PARAMETER;
ERR("Attach Free! ptiFrom 0x%p ptiTo 0x%p paiCount %d\n",ptiFrom,ptiTo,paiCount);
if (ptiTo->MessageQueue == ptiFrom->MessageQueue)
{
if (gptiForeground == ptiFrom)
{
ERR("ptiTo is now pti FG.\n");
// MessageQueue foreground is set so switch threads.
gptiForeground = ptiTo;
}
ptiTo->MessageQueue->cThreads--;
ERR("ptiTo E Share count %d\n", ptiTo->MessageQueue->cThreads);
ASSERT(ptiTo->MessageQueue->cThreads >= 1);
IntDereferenceMessageQueue(ptiTo->MessageQueue);
ptiFrom->MessageQueue = MsqCreateMessageQueue(ptiFrom);
ptiTo->MessageQueue->iCursorLevel -= ptiFrom->iCursorLevel;
}
else
{
ERR("Detaching Threads are not associated!\n");
}
}
/* Note that key state, which can be ascertained by calls to the GetKeyState
or GetKeyboardState function, is reset after a call to AttachThreadInput.
ATM which one?
*/
RtlCopyMemory(ptiTo->MessageQueue->afKeyState, gafAsyncKeyState, sizeof(gafAsyncKeyState));
/* Generate mouse move message */
msg.message = WM_MOUSEMOVE;
msg.wParam = UserGetMouseButtonsState();
msg.lParam = MAKELPARAM(gpsi->ptCursor.x, gpsi->ptCursor.y);
msg.pt = gpsi->ptCursor;
co_MsqInsertMouseMessage(&msg, 0, 0, TRUE);
return STATUS_SUCCESS;
}
