/* UserDetachMonitor
*
* Deletes a MONITOR and removes it from the list of monitors.
*
* Arguments
*
* pGdiDevice Pointer to the PDEVOBJ from which the monitor was detached
*
* Return value
* Returns a NTSTATUS
*/
NTSTATUS NTAPI
UserDetachMonitor(IN HDEV hDev)
{
PMONITOR pMonitor = gMonitorList, *pLink = &gMonitorList;
/* Find monitor attached to given device */
while (pMonitor != NULL)
{
if (pMonitor->hDev == hDev)
break;
pLink = &pMonitor->pMonitorNext;
pMonitor = pMonitor->pMonitorNext;
}
if (pMonitor == NULL)
{
/* No monitor has been found */
return STATUS_INVALID_PARAMETER;
}
/* We destroy primary monitor - set next as primary */
if (pMonitor->IsPrimary && pMonitor->pMonitorNext != NULL)
pMonitor->pMonitorNext->IsPrimary = TRUE;
/* Update Next ptr in previous monitor */
*pLink = pMonitor->pMonitorNext;
/* Finally destroy monitor */
IntDestroyMonitorObject(pMonitor);
return STATUS_SUCCESS;
}
/* IntDetachMonitor
*
* Deletes a MONITOR and removes it from the list of monitors.
*
* Arguments
*
* pGdiDevice Pointer to the PDEVOBJ from which the monitor was detached
*
* Return value
* Returns a NTSTATUS
*/
NTSTATUS
IntDetachMonitor(IN PDEVOBJ *pGdiDevice)
{
PMONITOR Monitor;
for (Monitor = gMonitorList; Monitor != NULL; Monitor = Monitor->Next)
{
if (Monitor->GdiDevice == pGdiDevice)
break;
}
if (Monitor == NULL)
{
/* no monitor for given device found */
return STATUS_INVALID_PARAMETER;
}
if (Monitor->IsPrimary && (Monitor->Next != NULL || Monitor->Prev != NULL))
{
PMONITOR NewPrimaryMonitor = (Monitor->Prev != NULL) ? (Monitor->Prev) : (Monitor->Next);
ExEnterCriticalRegionAndAcquireFastMutexUnsafe(&NewPrimaryMonitor->Lock);
NewPrimaryMonitor->IsPrimary = TRUE;
ExReleaseFastMutexUnsafeAndLeaveCriticalRegion(&NewPrimaryMonitor->Lock);
}
if (gMonitorList == Monitor)
{
gMonitorList = Monitor->Next;
if (Monitor->Next != NULL)
Monitor->Next->Prev = NULL;
}
else
{
Monitor->Prev->Next = Monitor->Next;
if (Monitor->Next != NULL)
Monitor->Next->Prev = Monitor->Prev;
}
if (Monitor->hrgnMonitor)
GreDeleteObject(Monitor->hrgnMonitor);
IntDestroyMonitorObject(Monitor);
return STATUS_SUCCESS;
}
