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:            drivers/video/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 /* PUBLIC FUNCTIONS ***********************************************************/
  15
  16 /*
  17  * @implemented
  18  */
  19 VP_STATUS
  20 NTAPI
  21 VideoPortCreateEvent(IN PVOID HwDeviceExtension,
  22                      IN ULONG EventFlag,
  23                      IN PVOID Unused,
  24                      OUT PEVENT *Event)
  25 {
  26     VP_STATUS Result = NO_ERROR;
  27     PVIDEO_PORT_EVENT EngEvent;
  28
  29     /* Allocate memory for the event structure */
  30     EngEvent = ExAllocatePoolWithTag(NonPagedPool,
  31                                      sizeof(VIDEO_PORT_EVENT) + sizeof(KEVENT),
  32                                      TAG_VIDEO_PORT);
  33     if (EngEvent)
  34     {
  35         /* Set KEVENT pointer */
  36         EngEvent->pKEvent = EngEvent + 1;
  37
  38         /* Initialize the kernel event */
  39         KeInitializeEvent(EngEvent->pKEvent,
  40                           (EventFlag & EVENT_TYPE_MASK) ?
  41                           NotificationEvent : SynchronizationEvent,
  42                           EventFlag & INITIAL_EVENT_STATE_MASK);
  43
  44         /* Pass pointer to our structure to the caller */
  45         *Event = (PEVENT)EngEvent;
  46         DPRINT("VideoPortCreateEvent() created %p\n", EngEvent);
  47     }
  48     else
  49     {
  50         /* Out of memory */
  51         DPRINT("VideoPortCreateEvent() failed\n");
  52         Result = ERROR_NOT_ENOUGH_MEMORY;
  53     }
  54
  55     /* Return result */
  56     return Result;
  57 }
  58
  59 /*
  60  * @implemented
  61  */
  62 VP_STATUS
  63 NTAPI
  64 VideoPortDeleteEvent(IN PVOID HwDeviceExtension,
  65                      IN PEVENT Event)
  66 {
  67     /* Handle error cases */
  68     if (!Event) return ERROR_INVALID_PARAMETER;
  69     if (Event->fFlags & ENG_EVENT_USERMAPPED) return ERROR_INVALID_PARAMETER;
  70     if (!Event->pKEvent) return ERROR_INVALID_PARAMETER;
  71
  72     /* Free storage */
  73     ExFreePool(Event);
  74
  75     /* Indicate success */
  76     return NO_ERROR;
  77 }
  78
  79 /*
  80  * @implemented
  81  */
  82 LONG
  83 NTAPI
  84 VideoPortSetEvent(IN PVOID HwDeviceExtension,
  85                   IN PEVENT Event)
  86 {
  87     return KeSetEvent(Event->pKEvent, IO_NO_INCREMENT, FALSE);
  88 }
  89
  90 /*
  91  * @implemented
  92  */
  93 VOID
  94 NTAPI
  95 VideoPortClearEvent(IN PVOID HwDeviceExtension,
  96                     IN PEVENT Event)
  97 {
  98     KeClearEvent(Event->pKEvent);
  99 }
 100
 101 /*
 102  * @implemented
 103  */
 104 VP_STATUS
 105 NTAPI
 106 VideoPortWaitForSingleObject(IN PVOID HwDeviceExtension,
 107                              IN PVOID Event,
 108                              IN PLARGE_INTEGER Timeout OPTIONAL)
 109 {
 110     PVIDEO_PORT_EVENT EngEvent = Event;
 111     NTSTATUS Status;
 112
 113     /* Handle error cases */
 114     if (!EngEvent) return ERROR_INVALID_PARAMETER;
 115     if (!EngEvent->pKEvent) return ERROR_INVALID_PARAMETER;
 116     if (EngEvent->fFlags & ENG_EVENT_USERMAPPED) return ERROR_INVALID_PARAMETER;
 117
 118     /* Do the actual wait */
 119     Status = KeWaitForSingleObject(EngEvent->pKEvent,
 120                                    Executive,
 121                                    KernelMode,
 122                                    FALSE,
 123                                    Timeout);
 124     if (Status == STATUS_TIMEOUT)
 125     {
 126         /* Convert to wait timeout, otherwise NT_SUCCESS would return NO_ERROR */
 127         return WAIT_TIMEOUT;
 128     }
 129     else if (NT_SUCCESS(Status))
 130     {
 131         /* All other success codes are Win32 success */
 132         return NO_ERROR;
 133     }
 134
 135     /* Otherwise, return default Win32 failure */
 136     return ERROR_INVALID_PARAMETER;
 137 }
 138
 139 /* EOF */
 140