--- /dev/null
+/** @file
+
+Copyright (c) 2006, Intel Corporation
+All rights reserved. This program and the accompanying materials
+are licensed and made available under the terms and conditions of the BSD License
+which accompanies this distribution. The full text of the license may be found at
+http://opensource.org/licenses/bsd-license.php
+
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+Module Name:
+
+ WinNtGopInput.c
+
+Abstract:
+
+ This file produces the Simple Text In for an Gop window.
+
+ This stuff is linked at the hip to the Window, since the window
+ processing is done in a thread kicked off in WinNtGopImplementation.c
+
+ Since the window information is processed in an other thread we need
+ a keyboard Queue to pass data about. The Simple Text In code just
+ takes data off the Queue. The WinProc message loop takes keyboard input
+ and places it in the Queue.
+
+
+**/
+
+#include "WinNtGop.h"
+
+
+/**
+ TODO: Add function description
+
+ @param Private TODO: add argument description
+
+ @retval EFI_SUCCESS TODO: Add description for return value
+
+**/
+EFI_STATUS
+GopPrivateCreateQ (
+ IN GOP_PRIVATE_DATA *Private
+ )
+{
+ Private->WinNtThunk->InitializeCriticalSection (&Private->QCriticalSection);
+
+ Private->Queue.Front = 0;
+ Private->Queue.Rear = MAX_Q - 1;
+ Private->Queue.Count = 0;
+ return EFI_SUCCESS;
+}
+
+
+/**
+ TODO: Add function description
+
+ @param Private TODO: add argument description
+
+ @retval EFI_SUCCESS TODO: Add description for return value
+
+**/
+EFI_STATUS
+GopPrivateDestroyQ (
+ IN GOP_PRIVATE_DATA *Private
+ )
+{
+ Private->Queue.Count = 0;
+ Private->WinNtThunk->DeleteCriticalSection (&Private->QCriticalSection);
+ return EFI_SUCCESS;
+}
+
+
+/**
+ TODO: Add function description
+
+ @param Private TODO: add argument description
+ @param Key TODO: add argument description
+
+ @retval EFI_NOT_READY TODO: Add description for return value
+ @retval EFI_SUCCESS TODO: Add description for return value
+
+**/
+EFI_STATUS
+GopPrivateAddQ (
+ IN GOP_PRIVATE_DATA *Private,
+ IN EFI_INPUT_KEY Key
+ )
+{
+ Private->WinNtThunk->EnterCriticalSection (&Private->QCriticalSection);
+
+ if (Private->Queue.Count == MAX_Q) {
+ Private->WinNtThunk->LeaveCriticalSection (&Private->QCriticalSection);
+ return EFI_NOT_READY;
+ }
+
+ Private->Queue.Rear = (Private->Queue.Rear + 1) % MAX_Q;
+ Private->Queue.Q[Private->Queue.Rear] = Key;
+ Private->Queue.Count++;
+
+ Private->WinNtThunk->LeaveCriticalSection (&Private->QCriticalSection);
+ return EFI_SUCCESS;
+}
+
+
+/**
+ TODO: Add function description
+
+ @param Private TODO: add argument description
+ @param Key TODO: add argument description
+
+ @retval EFI_NOT_READY TODO: Add description for return value
+ @retval EFI_SUCCESS TODO: Add description for return value
+
+**/
+EFI_STATUS
+GopPrivateDeleteQ (
+ IN GOP_PRIVATE_DATA *Private,
+ OUT EFI_INPUT_KEY *Key
+ )
+{
+ Private->WinNtThunk->EnterCriticalSection (&Private->QCriticalSection);
+
+ if (Private->Queue.Count == 0) {
+ Private->WinNtThunk->LeaveCriticalSection (&Private->QCriticalSection);
+ return EFI_NOT_READY;
+ }
+
+ *Key = Private->Queue.Q[Private->Queue.Front];
+ Private->Queue.Front = (Private->Queue.Front + 1) % MAX_Q;
+ Private->Queue.Count--;
+
+ Private->WinNtThunk->LeaveCriticalSection (&Private->QCriticalSection);
+ return EFI_SUCCESS;
+}
+
+
+/**
+ TODO: Add function description
+
+ @param Private TODO: add argument description
+
+ @retval EFI_NOT_READY TODO: Add description for return value
+ @retval EFI_SUCCESS TODO: Add description for return value
+
+**/
+EFI_STATUS
+GopPrivateCheckQ (
+ IN GOP_PRIVATE_DATA *Private
+ )
+{
+ if (Private->Queue.Count == 0) {
+ return EFI_NOT_READY;
+ }
+
+ return EFI_SUCCESS;
+}
+
+//
+// Simple Text In implementation.
+//
+
+
+/**
+ TODO: Add function description
+
+ @param This TODO: add argument description
+ @param ExtendedVerification TODO: add argument description
+
+ @retval EFI_SUCCESS TODO: Add description for return value
+
+**/
+EFI_STATUS
+EFIAPI
+WinNtGopSimpleTextInReset (
+ IN EFI_SIMPLE_TEXT_INPUT_PROTOCOL *This,
+ IN BOOLEAN ExtendedVerification
+ )
+{
+ GOP_PRIVATE_DATA *Private;
+ EFI_INPUT_KEY Key;
+ EFI_TPL OldTpl;
+
+ Private = GOP_PRIVATE_DATA_FROM_TEXT_IN_THIS (This);
+
+ //
+ // Enter critical section
+ //
+ OldTpl = gBS->RaiseTPL (TPL_NOTIFY);
+
+ //
+ // A reset is draining the Queue
+ //
+ while (GopPrivateDeleteQ (Private, &Key) == EFI_SUCCESS)
+ ;
+
+ //
+ // Leave critical section and return
+ //
+ gBS->RestoreTPL (OldTpl);
+ return EFI_SUCCESS;
+}
+
+
+/**
+ TODO: Add function description
+
+ @param This TODO: add argument description
+ @param Key TODO: add argument description
+
+ @return TODO: add return values
+
+**/
+STATIC
+EFI_STATUS
+EFIAPI
+WinNtGopSimpleTextInReadKeyStroke (
+ IN EFI_SIMPLE_TEXT_INPUT_PROTOCOL *This,
+ OUT EFI_INPUT_KEY *Key
+ )
+{
+ GOP_PRIVATE_DATA *Private;
+ EFI_STATUS Status;
+ EFI_TPL OldTpl;
+
+ Private = GOP_PRIVATE_DATA_FROM_TEXT_IN_THIS (This);
+
+ //
+ // Enter critical section
+ //
+ OldTpl = gBS->RaiseTPL (TPL_NOTIFY);
+
+ Status = GopPrivateCheckQ (Private);
+ if (!EFI_ERROR (Status)) {
+ //
+ // If a Key press exists try and read it.
+ //
+ Status = GopPrivateDeleteQ (Private, Key);
+ }
+
+ //
+ // Leave critical section and return
+ //
+ gBS->RestoreTPL (OldTpl);
+
+ return Status;
+}
+
+
+/**
+ TODO: Add function description
+
+ @param Event TODO: add argument description
+ @param Context TODO: add argument description
+
+ @return TODO: add return values
+
+**/
+STATIC
+VOID
+EFIAPI
+WinNtGopSimpleTextInWaitForKey (
+ IN EFI_EVENT Event,
+ IN VOID *Context
+ )
+{
+ GOP_PRIVATE_DATA *Private;
+ EFI_STATUS Status;
+ EFI_TPL OldTpl;
+
+ Private = (GOP_PRIVATE_DATA *) Context;
+
+ //
+ // Enter critical section
+ //
+ OldTpl = gBS->RaiseTPL (TPL_NOTIFY);
+
+ Status = GopPrivateCheckQ (Private);
+ if (!EFI_ERROR (Status)) {
+ //
+ // If a there is a key in the queue signal our event.
+ //
+ gBS->SignalEvent (Event);
+ } else {
+ //
+ // We need to sleep or NT will schedule this thread with such high
+ // priority that WinProc thread will never run and we will not see
+ // keyboard input. This Sleep makes the syste run 10x faster, so don't
+ // remove it.
+ //
+ Private->WinNtThunk->Sleep (1);
+ }
+
+ //
+ // Leave critical section and return
+ //
+ gBS->RestoreTPL (OldTpl);
+}
+
+
+/**
+ TODO: Add function description
+
+ @param Private TODO: add argument description
+
+ @return TODO: add return values
+
+**/
+EFI_STATUS
+WinNtGopInitializeSimpleTextInForWindow (
+ IN GOP_PRIVATE_DATA *Private
+ )
+{
+ EFI_STATUS Status;
+
+ GopPrivateCreateQ (Private);
+
+ //
+ // Initialize Simple Text In protoocol
+ //
+ Private->SimpleTextIn.Reset = WinNtGopSimpleTextInReset;
+ Private->SimpleTextIn.ReadKeyStroke = WinNtGopSimpleTextInReadKeyStroke;
+
+ Status = gBS->CreateEvent (
+ EVENT_NOTIFY_WAIT,
+ TPL_NOTIFY,
+ WinNtGopSimpleTextInWaitForKey,
+ Private,
+ &Private->SimpleTextIn.WaitForKey
+ );
+
+ return Status;
+}
+
+
+/**
+ TODO: Add function description
+
+ @param Private TODO: add argument description
+
+ @retval EFI_SUCCESS TODO: Add description for return value
+
+**/
+EFI_STATUS
+WinNtGopDestroySimpleTextInForWindow (
+ IN GOP_PRIVATE_DATA *Private
+ )
+{
+ GopPrivateDestroyQ (Private);
+ return EFI_SUCCESS;
+}
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