NTSTATUS NTAPI
ConDrvSetConsoleActiveScreenBuffer(IN PCONSOLE Console,
IN PCONSOLE_SCREEN_BUFFER Buffer)
{
if (Console == NULL || Buffer == NULL)
return STATUS_INVALID_PARAMETER;
/* Validity check */
ASSERT(Console == Buffer->Header.Console);
if (Buffer == Console->ActiveBuffer) return STATUS_SUCCESS;
/* If old buffer has no handles, it's now unreferenced */
if (Console->ActiveBuffer->Header.HandleCount == 0)
{
ConioDeleteScreenBuffer(Console->ActiveBuffer);
}
/* Tie console to new buffer */
ConioSetActiveScreenBuffer(Buffer);
return STATUS_SUCCESS;
}
static VOID
ConSrvCloseHandleEntry(PCONSOLE_IO_HANDLE Entry)
{
PCONSOLE_IO_OBJECT Object = Entry->Object;
if (Object != NULL)
{
/// LOCK /// PCONSOLE Console = Object->Console;
/// LOCK /// EnterCriticalSection(&Console->Lock);
/*
* If this is a input handle, notify and dereference
* all the waits related to this handle.
*/
if (Object->Type == INPUT_BUFFER)
{
PCONSOLE_INPUT_BUFFER InputBuffer = (PCONSOLE_INPUT_BUFFER)Object;
/*
* Wake up all the writing waiters related to this handle for this
* input buffer, if any, then dereference them and purge them all
* from the list.
* To select them amongst all the waiters for this input buffer,
* pass the handle pointer to the waiters, then they will check
* whether or not they are related to this handle and if so, they
* return.
*/
CsrNotifyWait(&InputBuffer->ReadWaitQueue,
TRUE,
NULL,
(PVOID)Entry);
if (!IsListEmpty(&InputBuffer->ReadWaitQueue))
{
CsrDereferenceWait(&InputBuffer->ReadWaitQueue);
}
}
/* If the last handle to a screen buffer is closed, delete it... */
if (AdjustHandleCounts(Entry, -1) == 0)
{
if (Object->Type == TEXTMODE_BUFFER || Object->Type == GRAPHICS_BUFFER)
{
PCONSOLE_SCREEN_BUFFER Buffer = (PCONSOLE_SCREEN_BUFFER)Object;
/* ...unless it's the only buffer left. Windows allows deletion
* even of the last buffer, but having to deal with a lack of
* any active buffer might be error-prone. */
if (Buffer->ListEntry.Flink != Buffer->ListEntry.Blink)
ConioDeleteScreenBuffer(Buffer);
}
else if (Object->Type == INPUT_BUFFER)
{
DPRINT("Closing the input buffer\n");
}
else
{
DPRINT1("Invalid object type %d\n", Object->Type);
}
}
/// LOCK /// LeaveCriticalSection(&Console->Lock);
/* Invalidate (zero-out) this handle entry */
// Entry->Object = NULL;
// RtlZeroMemory(Entry, sizeof(*Entry));
}
RtlZeroMemory(Entry, sizeof(*Entry)); // Be sure the whole entry is invalidated.
}