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[WIN32K]

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- Add missing locks in monitors API
- Set proper last error when allocation fails

svn path=/trunk/; revision=54195
This commit is contained in:
Rafal Harabien
2011-10-18 23:01:29 +00:00
parent 9368b91f31
commit 4ba68ec5ab
2 changed files with 39 additions and 32 deletions
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reactos/subsystems/win32/win32k/include/monitor.h
+1 -2
View File
@@ -5,7 +5,6 @@ typedef struct _MONITOR
{
HEAD head;
//
FAST_MUTEX Lock; /* R/W lock */
UNICODE_STRING DeviceName; /* name of the monitor */
PDEVOBJ *GdiDevice; /* pointer to the GDI device to
which this monitor is attached */
@@ -21,7 +20,7 @@ typedef struct _MONITOR
RECT rcMonitor;
RECT rcWork;
HRGN hrgnMonitor;
SHORT Spare0;
SHORT cFullScreen;
SHORT cWndStack;
HDEV hDev;
HDEV hDevReal;
reactos/subsystems/win32/win32k/ntuser/monitor.c
+38 -30
View File
@@ -46,8 +46,6 @@ IntCreateMonitorObject()
return NULL;
}
ExInitializeFastMutex(&Monitor->Lock);
return Monitor;
}
@@ -187,9 +185,7 @@ IntDetachMonitor(IN PDEVOBJ *pGdiDevice)
{
PMONITOR NewPrimaryMonitor = (Monitor->Prev != NULL) ? (Monitor->Prev) : (Monitor->Next);
ExEnterCriticalRegionAndAcquireFastMutexUnsafe(&NewPrimaryMonitor->Lock);
NewPrimaryMonitor->IsPrimary = TRUE;
ExReleaseFastMutexUnsafeAndLeaveCriticalRegion(&NewPrimaryMonitor->Lock);
}
if (gMonitorList == Monitor)
@@ -332,9 +328,7 @@ IntGetMonitorsFromRect(OPTIONAL IN LPCRECTL pRect,
{
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);
@@ -524,13 +518,15 @@ NtUserEnumDisplayMonitors(
else
myRect = ▭
UserEnterShared();
/* find intersecting monitors */
numMonitors = IntGetMonitorsFromRect(myRect, NULL, NULL, 0, 0);
if (numMonitors == 0 || listSize == 0 ||
(hMonitorList == NULL && monitorRectList == NULL))
{
TRACE("numMonitors = %d\n", numMonitors);
return numMonitors;
goto cleanup;
}
if (hMonitorList != NULL && listSize != 0)
@@ -538,8 +534,9 @@ NtUserEnumDisplayMonitors(
safeHMonitorList = ExAllocatePoolWithTag(PagedPool, sizeof (HMONITOR) * listSize, USERTAG_MONITORRECTS);
if (safeHMonitorList == NULL)
{
/* FIXME: EngSetLastError? */
return -1;
EngSetLastError(ERROR_NOT_ENOUGH_MEMORY);
numMonitors = -1;
goto cleanup;
}
}
if (monitorRectList != NULL && listSize != 0)
@@ -548,8 +545,9 @@ NtUserEnumDisplayMonitors(
if (safeRectList == NULL)
{
ExFreePoolWithTag(safeHMonitorList, USERTAG_MONITORRECTS);
/* FIXME: EngSetLastError? */
return -1;
EngSetLastError(ERROR_NOT_ENOUGH_MEMORY);
numMonitors = -1;
goto cleanup;
}
}
@@ -570,12 +568,13 @@ NtUserEnumDisplayMonitors(
if (hMonitorList != NULL && listSize != 0)
{
status = MmCopyToCaller(hMonitorList, safeHMonitorList, sizeof (HMONITOR) * listSize);
ExFreePool(safeHMonitorList);
ExFreePoolWithTag(safeHMonitorList, USERTAG_MONITORRECTS);
if (!NT_SUCCESS(status))
{
ExFreePoolWithTag(safeRectList, USERTAG_MONITORRECTS);
SetLastNtError(status);
return -1;
numMonitors = -1;
goto cleanup;
}
}
if (monitorRectList != NULL && listSize != 0)
@@ -585,10 +584,12 @@ NtUserEnumDisplayMonitors(
if (!NT_SUCCESS(status))
{
SetLastNtError(status);
return -1;
numMonitors = -1;
}
}
cleanup:
UserLeave();
return numMonitors;
}
@@ -725,13 +726,14 @@ NtUserMonitorFromPoint(
InRect.top = point.y;
InRect.bottom = point.y + 1;
UserEnterShared();
/* find intersecting monitor */
NumMonitors = IntGetMonitorsFromRect(&InRect, &hMonitor, NULL, 1, dwFlags);
if (NumMonitors < 0)
{
return (HMONITOR)NULL;
}
hMonitor = NULL;
UserLeave();
return hMonitor;
}
@@ -759,8 +761,8 @@ NtUserMonitorFromRect(
IN DWORD dwFlags)
{
ULONG numMonitors, iLargestArea = 0, i;
PRECTL rectList;
HMONITOR *hMonitorList;
PRECTL rectList = NULL;
HMONITOR *hMonitorList = NULL;
HMONITOR hMonitor = NULL;
RECTL rect;
NTSTATUS status;
@@ -773,11 +775,13 @@ NtUserMonitorFromRect(
return (HMONITOR)NULL;
}
UserEnterShared();
/* find intersecting monitors */
numMonitors = IntGetMonitorsFromRect(&rect, &hMonitor, NULL, 1, dwFlags);
if (numMonitors <= 1)
{
return hMonitor;
goto cleanup;
}
hMonitorList = ExAllocatePoolWithTag(PagedPool,
@@ -785,8 +789,9 @@ NtUserMonitorFromRect(
USERTAG_MONITORRECTS);
if (hMonitorList == NULL)
{
/* FIXME: EngSetLastError? */
return (HMONITOR)NULL;
EngSetLastError(ERROR_NOT_ENOUGH_MEMORY);
hMonitor = NULL;
goto cleanup;
}
rectList = ExAllocatePoolWithTag(PagedPool,
@@ -794,9 +799,9 @@ NtUserMonitorFromRect(
USERTAG_MONITORRECTS);
if (rectList == NULL)
{
ExFreePoolWithTag(hMonitorList, USERTAG_MONITORRECTS);
/* FIXME: EngSetLastError? */
return (HMONITOR)NULL;
EngSetLastError(ERROR_NOT_ENOUGH_MEMORY);
hMonitor = NULL;
goto cleanup;
}
/* get intersecting monitors */
@@ -804,9 +809,8 @@ NtUserMonitorFromRect(
numMonitors, 0);
if (numMonitors == 0)
{
ExFreePoolWithTag(hMonitorList, USERTAG_MONITORRECTS);
ExFreePoolWithTag(rectList, USERTAG_MONITORRECTS);
return (HMONITOR)NULL;
hMonitor = NULL;
goto cleanup;
}
/* find largest intersection */
@@ -820,8 +824,12 @@ NtUserMonitorFromRect(
}
}
ExFreePoolWithTag(hMonitorList, USERTAG_MONITORRECTS);
ExFreePoolWithTag(rectList, USERTAG_MONITORRECTS);
cleanup:
if (hMonitorList)
ExFreePoolWithTag(hMonitorList, USERTAG_MONITORRECTS);
if (rectList)
ExFreePoolWithTag(rectList, USERTAG_MONITORRECTS);
UserLeave();
return hMonitor;
}