/* 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;
}
/* IntGetMonitorsFromRect
*
* Returns a list of monitor handles/rectangles. The rectangles in the list are
* the areas of intersection with the monitors.
*
* Arguments
*
* pRect
* Rectangle in desktop coordinates. If this is NULL all monitors are
* returned and the rect list is filled with the sizes of the monitors.
*
* hMonitorList
* Pointer to an array of HMONITOR which is filled with monitor handles.
* Can be NULL
*
* monitorRectList
* Pointer to an array of RECT which is filled with intersection rects in
* desktop coordinates.
* Can be NULL, will be ignored if no intersecting monitor is found and
* flags is MONITOR_DEFAULTTONEAREST
*
* listSize
* Size of the hMonitorList and monitorRectList arguments. If this is zero
* hMonitorList and monitorRectList are ignored.
*
* flags
* Either 0 or MONITOR_DEFAULTTONEAREST (ignored if rect is NULL)
*
* Returns
* The number of monitors which intersect the specified region.
*/
static
UINT
IntGetMonitorsFromRect(OPTIONAL IN LPCRECTL pRect,
OPTIONAL OUT HMONITOR *hMonitorList,
OPTIONAL OUT PRECTL monitorRectList,
OPTIONAL IN DWORD listSize,
OPTIONAL IN DWORD flags)
{
PMONITOR Monitor, NearestMonitor = NULL, PrimaryMonitor = NULL;
UINT iCount = 0;
ULONG iNearestDistance = 0xffffffff;
/* Find monitors which intersect the rectangle */
for (Monitor = gMonitorList; Monitor != NULL; Monitor = Monitor->Next)
{
RECTL MonitorRect, IntersectionRect;
ExEnterCriticalRegionAndAcquireFastMutexUnsafe(&Monitor->Lock);
MonitorRect = Monitor->rcMonitor;
ExReleaseFastMutexUnsafeAndLeaveCriticalRegion(&Monitor->Lock);
TRACE("MonitorRect: left = %d, top = %d, right = %d, bottom = %d\n",
MonitorRect.left, MonitorRect.top, MonitorRect.right, MonitorRect.bottom);
if (flags == MONITOR_DEFAULTTOPRIMARY && Monitor->IsPrimary)
{
PrimaryMonitor = Monitor;
}
/* Check if a rect is given */
if (pRect == NULL)
{
/* No rect given, so use the full monitor rect */
IntersectionRect = MonitorRect;
}
/* We have a rect, calculate intersection */
else if (!RECTL_bIntersectRect(&IntersectionRect, &MonitorRect, pRect))
{
/* Rects did not intersect */
if (flags == MONITOR_DEFAULTTONEAREST)
{
ULONG cx, cy, iDistance;
/* Get x and y distance */
cx = min(abs(MonitorRect.left - pRect->right),
abs(pRect->left - MonitorRect.right));
cy = min(abs(MonitorRect.top - pRect->bottom),
abs(pRect->top - MonitorRect.bottom));
/* Calculate distance square */
iDistance = cx * cx + cy * cy;
/* Check if this is the new nearest monitor */
if (iDistance < iNearestDistance)
{
iNearestDistance = iDistance;
NearestMonitor = Monitor;
}
}
continue;
}
/* Check if there's space in the buffer */
if (iCount < listSize)
{
if (hMonitorList != NULL)
hMonitorList[iCount] = UserHMGetHandle(Monitor);
if (monitorRectList != NULL)
monitorRectList[iCount] = IntersectionRect;
}
/* Increase count of found monitors */
iCount++;
}
/* Found nothing intersecting? */
if (iCount == 0)
{
/* Check if we shall default to the nearest monitor */
if (flags == MONITOR_DEFAULTTONEAREST && NearestMonitor)
{
if (hMonitorList && listSize > 0)
hMonitorList[iCount] = UserHMGetHandle(NearestMonitor);
iCount++;
}
/* Check if we shall default to the primary monitor */
else if (flags == MONITOR_DEFAULTTOPRIMARY && PrimaryMonitor)
{
if (hMonitorList != NULL && listSize > 0)
hMonitorList[iCount] = UserHMGetHandle(PrimaryMonitor);
iCount++;
}
}
return iCount;
}
static
VOID
TestFastMutex(
PFAST_MUTEX Mutex,
KIRQL OriginalIrql)
{
PKTHREAD Thread = KeGetCurrentThread();
ok_irql(OriginalIrql);
/* acquire/release normally */
ExAcquireFastMutex(Mutex);
CheckMutex(Mutex, 0L, Thread, 0LU, OriginalIrql, APC_LEVEL);
ok_bool_false(ExTryToAcquireFastMutex(Mutex), "ExTryToAcquireFastMutex returned");
CheckMutex(Mutex, 0L, Thread, 0LU, OriginalIrql, APC_LEVEL);
ExReleaseFastMutex(Mutex);
CheckMutex(Mutex, 1L, NULL, 0LU, OriginalIrql, OriginalIrql);
#ifdef _M_IX86
/* ntoskrnl's fastcall version */
ExiAcquireFastMutex(Mutex);
CheckMutex(Mutex, 0L, Thread, 0LU, OriginalIrql, APC_LEVEL);
ok_bool_false(ExiTryToAcquireFastMutex(Mutex), "ExiTryToAcquireFastMutex returned");
CheckMutex(Mutex, 0L, Thread, 0LU, OriginalIrql, APC_LEVEL);
ExiReleaseFastMutex(Mutex);
CheckMutex(Mutex, 1L, NULL, 0LU, OriginalIrql, OriginalIrql);
#endif
/* try to acquire */
ok_bool_true(ExTryToAcquireFastMutex(Mutex), "ExTryToAcquireFastMutex returned");
CheckMutex(Mutex, 0L, Thread, 0LU, OriginalIrql, APC_LEVEL);
ExReleaseFastMutex(Mutex);
CheckMutex(Mutex, 1L, NULL, 0LU, OriginalIrql, OriginalIrql);
/* shortcut functions with critical region */
ExEnterCriticalRegionAndAcquireFastMutexUnsafe(Mutex);
ok_bool_true(KeAreApcsDisabled(), "KeAreApcsDisabled returned");
ExReleaseFastMutexUnsafeAndLeaveCriticalRegion(Mutex);
/* acquire/release unsafe */
if (!KmtIsCheckedBuild || OriginalIrql == APC_LEVEL)
{
ExAcquireFastMutexUnsafe(Mutex);
CheckMutex(Mutex, 0L, Thread, 0LU, OriginalIrql, OriginalIrql);
ExReleaseFastMutexUnsafe(Mutex);
CheckMutex(Mutex, 1L, NULL, 0LU, OriginalIrql, OriginalIrql);
/* mismatched acquire/release */
ExAcquireFastMutex(Mutex);
CheckMutex(Mutex, 0L, Thread, 0LU, OriginalIrql, APC_LEVEL);
ExReleaseFastMutexUnsafe(Mutex);
CheckMutex(Mutex, 1L, NULL, 0LU, OriginalIrql, APC_LEVEL);
KmtSetIrql(OriginalIrql);
CheckMutex(Mutex, 1L, NULL, 0LU, OriginalIrql, OriginalIrql);
Mutex->OldIrql = 0x55555555LU;
ExAcquireFastMutexUnsafe(Mutex);
CheckMutex(Mutex, 0L, Thread, 0LU, 0x55555555LU, OriginalIrql);
Mutex->OldIrql = PASSIVE_LEVEL;
ExReleaseFastMutex(Mutex);
CheckMutex(Mutex, 1L, NULL, 0LU, PASSIVE_LEVEL, PASSIVE_LEVEL);
KmtSetIrql(OriginalIrql);
CheckMutex(Mutex, 1L, NULL, 0LU, PASSIVE_LEVEL, OriginalIrql);
}
if (!KmtIsCheckedBuild)
{
/* release without acquire */
ExReleaseFastMutexUnsafe(Mutex);
CheckMutex(Mutex, 2L, NULL, 0LU, PASSIVE_LEVEL, OriginalIrql);
--Mutex->Count;
Mutex->OldIrql = OriginalIrql;
ExReleaseFastMutex(Mutex);
CheckMutex(Mutex, 2L, NULL, 0LU, OriginalIrql, OriginalIrql);
ExReleaseFastMutex(Mutex);
CheckMutex(Mutex, 3L, NULL, 0LU, OriginalIrql, OriginalIrql);
Mutex->Count -= 2;
}
/* make sure we survive this in case of error */
ok_eq_long(Mutex->Count, 1L);
Mutex->Count = 1;
ok_irql(OriginalIrql);
KmtSetIrql(OriginalIrql);
}