ntoskrnl/io/event.c

   1 /* $Id$
   2  *
   3  * COPYRIGHT:       See COPYING in the top level directory
   4  * PROJECT:         ReactOS kernel
   5  * FILE:            ntoskrnl/io/event.c
   6  * PURPOSE:         Implements named events
   7  * PROGRAMMER:      David Welch (welch@mcmail.com)
   8  * UPDATE HISTORY:
   9  *                  Created 22/05/98
  10  */
  11
  12 /* INCLUDES *****************************************************************/
  13
  14 #include <ddk/ntddk.h>
  15 #include <ntos.h>
  16
  17 #include <internal/debug.h>
  18
  19 /* FUNCTIONS *****************************************************************/
  20
  21 /*
  22  * @implemented
  23  */
  24 PKEVENT STDCALL
  25 IoCreateNotificationEvent(PUNICODE_STRING EventName,
  26                           PHANDLE EventHandle)
  27 {
  28    OBJECT_ATTRIBUTES ObjectAttributes;
  29    PKEVENT Event;
  30    HANDLE Handle;
  31    NTSTATUS Status;
  32
  33    InitializeObjectAttributes(&ObjectAttributes,
  34                               EventName,
  35                               OBJ_OPENIF,
  36                               NULL,
  37                               NULL);
  38
  39    Status = NtCreateEvent(&Handle,
  40                           EVENT_ALL_ACCESS,
  41                           &ObjectAttributes,
  42                           FALSE,
  43                           TRUE);
  44    if (!NT_SUCCESS(Status))
  45      {
  46         return NULL;
  47      }
  48
  49    ObReferenceObjectByHandle(Handle,
  50                              0,
  51                              ExEventObjectType,
  52                              KernelMode,
  53                              (PVOID*)&Event,
  54                              NULL);
  55    ObDereferenceObject(Event);
  56
  57    *EventHandle = Handle;
  58
  59    return Event;
  60 }
  61
  62 /*
  63  * @implemented
  64  */
  65 PKEVENT STDCALL
  66 IoCreateSynchronizationEvent(PUNICODE_STRING EventName,
  67                              PHANDLE EventHandle)
  68 {
  69    OBJECT_ATTRIBUTES ObjectAttributes;
  70    PKEVENT Event;
  71    HANDLE Handle;
  72    NTSTATUS Status;
  73
  74    InitializeObjectAttributes(&ObjectAttributes,
  75                               EventName,
  76                               OBJ_OPENIF,
  77                               NULL,
  78                               NULL);
  79
  80    Status = NtCreateEvent(&Handle,
  81                           EVENT_ALL_ACCESS,
  82                           &ObjectAttributes,
  83                           TRUE,
  84                           TRUE);
  85    if (!NT_SUCCESS(Status))
  86      {
  87         return NULL;
  88      }
  89
  90    ObReferenceObjectByHandle(Handle,
  91                              0,
  92                              ExEventObjectType,
  93                              KernelMode,
  94                              (PVOID*)&Event,
  95                              NULL);
  96    ObDereferenceObject(Event);
  97
  98    *EventHandle = Handle;
  99
 100    return Event;
 101 }
 102
 103 /* EOF */