win32ss/drivers/videoprt/event.c

   1 /*
   2  * PROJECT:         ReactOS Video Port Driver
   3  * LICENSE:         BSD - See COPYING.ARM in the top level directory
   4  * FILE:            win32ss/drivers/videoprt/event.c
   5  * PURPOSE:         Event Support Routines
   6  * PROGRAMMERS:     ReactOS Portable Systems Group
   7  */
   8
   9 /* INCLUDES *******************************************************************/
  10
  11 #include "videoprt.h"
  12 #include "../../gdi/eng/engevent.h"
  13
  14 #define NDEBUG
  15 #include <debug.h>
  16
  17 /* PUBLIC FUNCTIONS ***********************************************************/
  18
  19 /*
  20  * @implemented
  21  */
  22 VP_STATUS
  23 NTAPI
  24 VideoPortCreateEvent(
  25     _In_ PVOID HwDeviceExtension,
  26     _In_ ULONG EventFlag,
  27     _In_ PVOID Unused,
  28     _Out_ PEVENT* pEvent)
  29 {
  30     VP_STATUS Result = NO_ERROR;
  31     PVIDEO_PORT_EVENT EngEvent;
  32
  33     /* Allocate memory for the event structure */
  34     EngEvent = ExAllocatePoolWithTag(NonPagedPool,
  35                                      sizeof(VIDEO_PORT_EVENT) + sizeof(KEVENT),
  36                                      TAG_VIDEO_PORT);
  37     if (EngEvent)
  38     {
  39         /* Zero flags */
  40         EngEvent->fFlags = 0;
  41
  42         /* Set KEVENT pointer */
  43         EngEvent->pKEvent = EngEvent + 1;
  44
  45         /* Initialize the kernel event */
  46         KeInitializeEvent(EngEvent->pKEvent,
  47                           (EventFlag & EVENT_TYPE_MASK) ?
  48                           NotificationEvent : SynchronizationEvent,
  49                           EventFlag & INITIAL_EVENT_STATE_MASK);
  50
  51         /* Pass pointer to our structure to the caller */
  52         *pEvent = (PEVENT)EngEvent;
  53         DPRINT("VideoPortCreateEvent() created %p\n", EngEvent);
  54     }
  55     else
  56     {
  57         /* Out of memory */
  58         DPRINT("VideoPortCreateEvent() failed\n");
  59         Result = ERROR_NOT_ENOUGH_MEMORY;
  60     }
  61
  62     /* Return result */
  63     return Result;
  64 }
  65
  66 /*
  67  * @implemented
  68  */
  69 VP_STATUS
  70 NTAPI
  71 VideoPortDeleteEvent(
  72     _In_ PVOID HwDeviceExtension,
  73     _In_ PEVENT Event)
  74 {
  75     /* Handle error cases */
  76     if (!Event) return ERROR_INVALID_PARAMETER;
  77     if (Event->fFlags & ENG_EVENT_USERMAPPED) return ERROR_INVALID_PARAMETER;
  78     if (!Event->pKEvent) return ERROR_INVALID_PARAMETER;
  79
  80     /* Free storage */
  81     ExFreePoolWithTag(Event, TAG_VIDEO_PORT);
  82
  83     /* Indicate success */
  84     return NO_ERROR;
  85 }
  86
  87 /*
  88  * @implemented
  89  */
  90 LONG
  91 NTAPI
  92 VideoPortSetEvent(
  93     _In_ PVOID HwDeviceExtension,
  94     _In_ PEVENT Event)
  95 {
  96     ASSERT(Event);
  97     return KeSetEvent(Event->pKEvent, IO_NO_INCREMENT, FALSE);
  98 }
  99
 100 /*
 101  * @implemented
 102  */
 103 VOID
 104 NTAPI
 105 VideoPortClearEvent(
 106     _In_ PVOID HwDeviceExtension,
 107     _In_ PEVENT Event)
 108 {
 109     ASSERT(Event);
 110     KeClearEvent(Event->pKEvent);
 111 }
 112
 113 /*
 114  * @implemented
 115  */
 116 LONG
 117 NTAPI
 118 VideoPortReadStateEvent(
 119     _In_ PVOID HwDeviceExtension,
 120     _In_ PEVENT Event)
 121 {
 122     ASSERT(Event);
 123     return KeReadStateEvent(Event->pKEvent);
 124 }
 125
 126 /*
 127  * @implemented
 128  */
 129 VP_STATUS
 130 NTAPI
 131 VideoPortWaitForSingleObject(
 132     _In_ PVOID HwDeviceExtension,
 133     _In_ PVOID Event,
 134     _In_opt_ PLARGE_INTEGER Timeout)
 135 {
 136     PVIDEO_PORT_EVENT EngEvent = Event;
 137     NTSTATUS Status;
 138
 139     /* Handle error cases */
 140     if (!EngEvent) return ERROR_INVALID_PARAMETER;
 141     if (!EngEvent->pKEvent) return ERROR_INVALID_PARAMETER;
 142     if (EngEvent->fFlags & ENG_EVENT_USERMAPPED) return ERROR_INVALID_PARAMETER;
 143
 144     /* Do the actual wait */
 145     Status = KeWaitForSingleObject(EngEvent->pKEvent,
 146                                    Executive,
 147                                    KernelMode,
 148                                    FALSE,
 149                                    Timeout);
 150     if (Status == STATUS_TIMEOUT)
 151     {
 152         /* Convert to wait timeout, otherwise NT_SUCCESS would return NO_ERROR */
 153         return WAIT_TIMEOUT;
 154     }
 155     else if (NT_SUCCESS(Status))
 156     {
 157         /* All other success codes are Win32 success */
 158         return NO_ERROR;
 159     }
 160
 161     /* Otherwise, return default Win32 failure */
 162     return ERROR_INVALID_PARAMETER;
 163 }
 164
 165 /* EOF */