win32ss/drivers/videoprt/timer.c

   1 /*
   2  * VideoPort driver
   3  *
   4  * Copyright (C) 2002, 2003, 2004 ReactOS Team
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  19  *
  20  */
  21
  22 #include "videoprt.h"
  23
  24 /* PRIVATE FUNCTIONS **********************************************************/
  25
  26 VOID NTAPI
  27 IntVideoPortTimerRoutine(
  28    IN PDEVICE_OBJECT DeviceObject,
  29    IN PVOID ServiceContext)
  30 {
  31    PVIDEO_PORT_DEVICE_EXTENSION DeviceExtension = ServiceContext;
  32
  33    ASSERT(DeviceExtension->DriverExtension->InitializationData.HwTimer != NULL);
  34
  35    DeviceExtension->DriverExtension->InitializationData.HwTimer(
  36       &DeviceExtension->MiniPortDeviceExtension);
  37 }
  38
  39 BOOLEAN NTAPI
  40 IntVideoPortSetupTimer(
  41    IN PDEVICE_OBJECT DeviceObject,
  42    IN PVIDEO_PORT_DRIVER_EXTENSION DriverExtension)
  43 {
  44    NTSTATUS Status;
  45    PVIDEO_PORT_DEVICE_EXTENSION DeviceExtension;
  46
  47    DeviceExtension = (PVIDEO_PORT_DEVICE_EXTENSION)DeviceObject->DeviceExtension;
  48
  49    if (DriverExtension->InitializationData.HwTimer != NULL)
  50    {
  51       INFO_(VIDEOPRT, "Initializing timer\n");
  52
  53       Status = IoInitializeTimer(
  54          DeviceObject,
  55          IntVideoPortTimerRoutine,
  56          DeviceExtension);
  57
  58       if (!NT_SUCCESS(Status))
  59       {
  60          WARN_(VIDEOPRT, "IoInitializeTimer failed with status 0x%08x\n", Status);
  61          return FALSE;
  62       }
  63    }
  64
  65    return TRUE;
  66 }
  67
  68 /* PUBLIC FUNCTIONS ***********************************************************/
  69
  70 /*
  71  * @implemented
  72  */
  73
  74 VOID NTAPI
  75 VideoPortStartTimer(IN PVOID HwDeviceExtension)
  76 {
  77    TRACE_(VIDEOPRT, "VideoPortStartTimer\n");
  78    IoStartTimer(VIDEO_PORT_GET_DEVICE_EXTENSION(HwDeviceExtension)->FunctionalDeviceObject);
  79 }
  80
  81 /*
  82  * @implemented
  83  */
  84
  85 VOID NTAPI
  86 VideoPortStopTimer(IN PVOID HwDeviceExtension)
  87 {
  88    TRACE_(VIDEOPRT, "VideoPortStopTimer\n");
  89    IoStopTimer(VIDEO_PORT_GET_DEVICE_EXTENSION(HwDeviceExtension)->FunctionalDeviceObject);
  90 }