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 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 /* PUBLIC FUNCTIONS ***********************************************************/
  25
  26 /*
  27  * @implemented
  28  */
  29
  30 VP_STATUS NTAPI
  31 VideoPortCreateEvent(
  32    IN PVOID HwDeviceExtension,
  33    IN ULONG EventFlag,
  34    IN PVOID Unused,
  35    OUT PEVENT *Event)
  36 {
  37    PVIDEO_PORT_EVENT VpEvent;
  38    EVENT_TYPE Type = SynchronizationEvent;
  39
  40    /* Allocate storage for the event structure */
  41    VpEvent = ExAllocatePoolWithTag(
  42       NonPagedPool,
  43       sizeof(VIDEO_PORT_EVENT),
  44       TAG_VIDEO_PORT);
  45
  46    /* Fail if not enough memory */
  47    if (!VpEvent) return ERROR_NOT_ENOUGH_MEMORY;
  48
  49    /* Initialize the event structure */
  50    RtlZeroMemory(VpEvent, sizeof(VIDEO_PORT_EVENT));
  51    VpEvent->pKEvent = &VpEvent->Event;
  52
  53    /* Determine the event type */
  54    if (EventFlag & NOTIFICATION_EVENT)
  55       Type = NotificationEvent;
  56
  57    /* Initialize kernel event */
  58    KeInitializeEvent(VpEvent->pKEvent, Type, EventFlag & INITIAL_EVENT_SIGNALED);
  59
  60    /* Indicate success */
  61    return NO_ERROR;
  62 }
  63
  64 /*
  65  * @implemented
  66  */
  67
  68 VP_STATUS NTAPI
  69 VideoPortDeleteEvent(
  70    IN PVOID HwDeviceExtension,
  71    IN PEVENT Event)
  72 {
  73    /* Free storage */
  74    ExFreePool(Event);
  75
  76    /* Indicate success */
  77    return NO_ERROR;
  78 }
  79
  80 /*
  81  * @implemented
  82  */
  83
  84 LONG NTAPI
  85 VideoPortSetEvent(
  86    IN PVOID HwDeviceExtension,
  87    IN PEVENT Event)
  88 {
  89    return KeSetEvent(Event->pKEvent, IO_NO_INCREMENT, FALSE);
  90 }
  91
  92 /*
  93  * @implemented
  94  */
  95
  96 VOID NTAPI
  97 VideoPortClearEvent(
  98    IN PVOID HwDeviceExtension,
  99    IN PEVENT Event)
 100 {
 101    KeClearEvent(Event->pKEvent);
 102 }
 103
 104 /*
 105  * @implemented
 106  */
 107
 108 VP_STATUS NTAPI
 109 VideoPortWaitForSingleObject(
 110    IN PVOID HwDeviceExtension,
 111    IN PVOID Object,
 112    IN PLARGE_INTEGER Timeout OPTIONAL)
 113 {
 114    return KeWaitForSingleObject(
 115       Object,
 116       Executive,
 117       KernelMode,
 118       FALSE,
 119       Timeout);
 120 }