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 #define NDEBUG
  15 #include <debug.h>
  16
  17 /* PUBLIC FUNCTIONS ***********************************************************/
  18
  19 /*
  20  * @implemented
  21  */
  22 VP_STATUS
  23 NTAPI
  24 VideoPortCreateEvent(IN PVOID HwDeviceExtension,
  25                      IN ULONG EventFlag,
  26                      IN PVOID Unused,
  27                      OUT PEVENT *Event)
  28 {
  29     VP_STATUS Result = NO_ERROR;
  30     PVIDEO_PORT_EVENT EngEvent;
  31
  32     /* Allocate memory for the event structure */
  33     EngEvent = ExAllocatePoolWithTag(NonPagedPool,
  34                                      sizeof(VIDEO_PORT_EVENT) + sizeof(KEVENT),
  35                                      TAG_VIDEO_PORT);
  36     if (EngEvent)
  37     {
  38         /* Set KEVENT pointer */
  39         EngEvent->pKEvent = EngEvent + 1;
  40
  41         /* Initialize the kernel event */
  42         KeInitializeEvent(EngEvent->pKEvent,
  43                           (EventFlag & EVENT_TYPE_MASK) ?
  44                           NotificationEvent : SynchronizationEvent,
  45                           EventFlag & INITIAL_EVENT_STATE_MASK);
  46
  47         /* Pass pointer to our structure to the caller */
  48         *Event = (PEVENT)EngEvent;
  49         DPRINT("VideoPortCreateEvent() created %p\n", EngEvent);
  50     }
  51     else
  52     {
  53         /* Out of memory */
  54         DPRINT("VideoPortCreateEvent() failed\n");
  55         Result = ERROR_NOT_ENOUGH_MEMORY;
  56     }
  57
  58     /* Return result */
  59     return Result;
  60 }
  61
  62 /*
  63  * @implemented
  64  */
  65 VP_STATUS
  66 NTAPI
  67 VideoPortDeleteEvent(IN PVOID HwDeviceExtension,
  68                      IN PEVENT Event)
  69 {
  70     /* Handle error cases */
  71     if (!Event) return ERROR_INVALID_PARAMETER;
  72     if (Event->fFlags & ENG_EVENT_USERMAPPED) return ERROR_INVALID_PARAMETER;
  73     if (!Event->pKEvent) return ERROR_INVALID_PARAMETER;
  74
  75     /* Free storage */
  76     ExFreePool(Event);
  77
  78     /* Indicate success */
  79     return NO_ERROR;
  80 }
  81
  82 /*
  83  * @implemented
  84  */
  85 LONG
  86 NTAPI
  87 VideoPortSetEvent(IN PVOID HwDeviceExtension,
  88                   IN PEVENT Event)
  89 {
  90     return KeSetEvent(Event->pKEvent, IO_NO_INCREMENT, FALSE);
  91 }
  92
  93 /*
  94  * @implemented
  95  */
  96 VOID
  97 NTAPI
  98 VideoPortClearEvent(IN PVOID HwDeviceExtension,
  99                     IN PEVENT Event)
 100 {
 101     KeClearEvent(Event->pKEvent);
 102 }
 103
 104 /*
 105  * @implemented
 106  */
 107 VP_STATUS
 108 NTAPI
 109 VideoPortWaitForSingleObject(IN PVOID HwDeviceExtension,
 110                              IN PVOID Event,
 111                              IN PLARGE_INTEGER Timeout OPTIONAL)
 112 {
 113     PVIDEO_PORT_EVENT EngEvent = Event;
 114     NTSTATUS Status;
 115
 116     /* Handle error cases */
 117     if (!EngEvent) return ERROR_INVALID_PARAMETER;
 118     if (!EngEvent->pKEvent) return ERROR_INVALID_PARAMETER;
 119     if (EngEvent->fFlags & ENG_EVENT_USERMAPPED) return ERROR_INVALID_PARAMETER;
 120
 121     /* Do the actual wait */
 122     Status = KeWaitForSingleObject(EngEvent->pKEvent,
 123                                    Executive,
 124                                    KernelMode,
 125                                    FALSE,
 126                                    Timeout);
 127     if (Status == STATUS_TIMEOUT)
 128     {
 129         /* Convert to wait timeout, otherwise NT_SUCCESS would return NO_ERROR */
 130         return WAIT_TIMEOUT;
 131     }
 132     else if (NT_SUCCESS(Status))
 133     {
 134         /* All other success codes are Win32 success */
 135         return NO_ERROR;
 136     }
 137
 138     /* Otherwise, return default Win32 failure */
 139     return ERROR_INVALID_PARAMETER;
 140 }
 141
 142 /* EOF */