Unix version of EFI emulator

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@2182 6f19259b-4bc3-4df7-8a09-765794883524

EdkUnixPkg/Dxe/UnixThunk/Bus/Uga/UnixUgaInput.c

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+/*++
+
+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:
+
+  UnixUgaInput.c
+
+Abstract:
+
+  This file produces the Simple Text In for an Uga window. 
+
+  This stuff is linked at the hip to the Window, since the window
+  processing is done in a thread kicked off in UnixUgaImplementation.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 "UnixUga.h"
+
+//
+// Simple Text In implementation.
+//
+
+EFI_STATUS
+EFIAPI
+UnixUgaSimpleTextInReset (
+  IN EFI_SIMPLE_TEXT_IN_PROTOCOL          *This,
+  IN BOOLEAN                              ExtendedVerification
+  )
+/*++
+
+Routine Description:
+
+  TODO: Add function description
+
+Arguments:
+
+  This                  - TODO: add argument description
+  ExtendedVerification  - TODO: add argument description
+
+Returns:
+
+  EFI_SUCCESS - TODO: Add description for return value
+
+--*/
+{
+  UGA_PRIVATE_DATA  *Private;
+  EFI_INPUT_KEY     Key;
+  EFI_TPL           OldTpl;
+
+  Private = UGA_PRIVATE_DATA_FROM_TEXT_IN_THIS (This);
+  if (Private->UgaIo == NULL) {
+    return EFI_SUCCESS;
+  }
+
+  //
+  // Enter critical section
+  //
+  OldTpl = gBS->RaiseTPL (EFI_TPL_NOTIFY);
+
+  //
+  // A reset is draining the Queue
+  //
+  while (Private->UgaIo->UgaGetKey(Private->UgaIo, &Key) == EFI_SUCCESS)
+    ;
+
+  //
+  // Leave critical section and return
+  //
+  gBS->RestoreTPL (OldTpl);
+  return EFI_SUCCESS;
+}
+
+STATIC
+EFI_STATUS
+EFIAPI
+UnixUgaSimpleTextInReadKeyStroke (
+  IN EFI_SIMPLE_TEXT_IN_PROTOCOL          *This,
+  OUT EFI_INPUT_KEY                       *Key
+  )
+/*++
+
+Routine Description:
+
+  TODO: Add function description
+
+Arguments:
+
+  This  - TODO: add argument description
+  Key   - TODO: add argument description
+
+Returns:
+
+  TODO: add return values
+
+--*/
+{
+  UGA_PRIVATE_DATA  *Private;
+  EFI_STATUS        Status;
+  EFI_TPL           OldTpl;
+
+  Private = UGA_PRIVATE_DATA_FROM_TEXT_IN_THIS (This);
+  if (Private->UgaIo == NULL) {
+    return EFI_NOT_READY;
+  }
+
+  //
+  // Enter critical section
+  //
+  OldTpl  = gBS->RaiseTPL (EFI_TPL_NOTIFY);
+
+  Status  = Private->UgaIo->UgaGetKey(Private->UgaIo, Key);
+  //
+  // Leave critical section and return
+  //
+  gBS->RestoreTPL (OldTpl);
+
+  return Status;
+}
+
+STATIC
+VOID
+EFIAPI
+UnixUgaSimpleTextInWaitForKey (
+  IN EFI_EVENT          Event,
+  IN VOID               *Context
+  )
+/*++
+
+Routine Description:
+
+  TODO: Add function description
+
+Arguments:
+
+  Event   - TODO: add argument description
+  Context - TODO: add argument description
+
+Returns:
+
+  TODO: add return values
+
+--*/
+{
+  UGA_PRIVATE_DATA  *Private;
+  EFI_STATUS        Status;
+  EFI_TPL           OldTpl;
+
+  Private = (UGA_PRIVATE_DATA *) Context;
+  if (Private->UgaIo == NULL) {
+    return;
+  }
+
+  //
+  // Enter critical section
+  //
+  OldTpl  = gBS->RaiseTPL (EFI_TPL_NOTIFY);
+
+  Status  = Private->UgaIo->UgaCheckKey(Private->UgaIo);
+  if (!EFI_ERROR (Status)) {
+    //
+    // If a there is a key in the queue signal our event.
+    //
+    gBS->SignalEvent (Event);
+  }
+  //
+  // Leave critical section and return
+  //
+  gBS->RestoreTPL (OldTpl);
+}
+
+EFI_STATUS
+UnixUgaInitializeSimpleTextInForWindow (
+  IN  UGA_PRIVATE_DATA    *Private
+  )
+/*++
+
+Routine Description:
+
+  TODO: Add function description
+
+Arguments:
+
+  Private - TODO: add argument description
+
+Returns:
+
+  TODO: add return values
+
+--*/
+{
+  EFI_STATUS  Status;
+
+  //
+  // Initialize Simple Text In protoocol
+  //
+  Private->SimpleTextIn.Reset         = UnixUgaSimpleTextInReset;
+  Private->SimpleTextIn.ReadKeyStroke = UnixUgaSimpleTextInReadKeyStroke;
+
+  Status = gBS->CreateEvent (
+                  EFI_EVENT_NOTIFY_WAIT,
+                  EFI_TPL_NOTIFY,
+                  UnixUgaSimpleTextInWaitForKey,
+                  Private,
+                  &Private->SimpleTextIn.WaitForKey
+                  );
+
+  return Status;
+}