drivers/video/videoprt/event.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 Library General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 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  * Library General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Library General Public
  17  * License along with this library; see the file COPYING.LIB.
  18  * If not, write to the Free Software Foundation,
  19  * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  20  *
  21  */
  22
  23 #include "videoprt.h"
  24
  25 /* PUBLIC FUNCTIONS ***********************************************************/
  26
  27 /*
  28  * @implemented
  29  */
  30
  31 VP_STATUS NTAPI
  32 VideoPortCreateEvent(
  33    IN PVOID HwDeviceExtension,
  34    IN ULONG EventFlag,
  35    IN PVOID Unused,
  36    OUT PEVENT *Event)
  37 {
  38    EVENT_TYPE Type;
  39
  40    (*Event) = ExAllocatePoolWithTag(
  41       NonPagedPool,
  42       sizeof(KEVENT),
  43       TAG_VIDEO_PORT);
  44
  45    if ((*Event) == NULL)
  46       return ERROR_NOT_ENOUGH_MEMORY;
  47
  48    if (EventFlag & NOTIFICATION_EVENT)
  49       Type = NotificationEvent;
  50    else
  51       Type = SynchronizationEvent;
  52
  53    KeInitializeEvent((PKEVENT)*Event, Type, EventFlag & INITIAL_EVENT_SIGNALED);
  54    return NO_ERROR;
  55 }
  56
  57 /*
  58  * @implemented
  59  */
  60
  61 VP_STATUS NTAPI
  62 VideoPortDeleteEvent(
  63    IN PVOID HwDeviceExtension,
  64    IN PEVENT Event)
  65 {
  66    ExFreePool(Event);
  67    return NO_ERROR;
  68 }
  69
  70 /*
  71  * @implemented
  72  */
  73
  74 LONG NTAPI
  75 VideoPortSetEvent(
  76    IN PVOID HwDeviceExtension,
  77    IN PEVENT Event)
  78 {
  79    return KeSetEvent((PKEVENT)Event, IO_NO_INCREMENT, FALSE);
  80 }
  81
  82 /*
  83  * @implemented
  84  */
  85
  86 VOID NTAPI
  87 VideoPortClearEvent(
  88    IN PVOID HwDeviceExtension,
  89    IN PEVENT Event)
  90 {
  91    KeClearEvent((PKEVENT)Event);
  92 }
  93
  94 /*
  95  * @implemented
  96  */
  97
  98 VP_STATUS NTAPI
  99 VideoPortWaitForSingleObject(
 100    IN PVOID HwDeviceExtension,
 101    IN PVOID Object,
 102    IN PLARGE_INTEGER Timeout OPTIONAL)
 103 {
 104    return KeWaitForSingleObject(
 105       Object,
 106       Executive,
 107       KernelMode,
 108       FALSE,
 109       Timeout);
 110 }