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 PKEVENT STDCALL
  22 IoCreateNotificationEvent(PUNICODE_STRING EventName,
  23                           PHANDLE EventHandle)
  24 {
  25    OBJECT_ATTRIBUTES ObjectAttributes;
  26    PKEVENT Event;
  27    HANDLE Handle;
  28    NTSTATUS Status;
  29
  30    InitializeObjectAttributes(&ObjectAttributes,
  31                               EventName,
  32                               OBJ_OPENIF,
  33                               NULL,
  34                               NULL);
  35
  36    Status = NtCreateEvent(&Handle,
  37                           EVENT_ALL_ACCESS,
  38                           &ObjectAttributes,
  39                           FALSE,
  40                           TRUE);
  41    if (!NT_SUCCESS(Status))
  42      {
  43         return NULL;
  44      }
  45
  46    ObReferenceObjectByHandle(Handle,
  47                              0,
  48                              ExEventObjectType,
  49                              KernelMode,
  50                              (PVOID*)&Event,
  51                              NULL);
  52    ObDereferenceObject(Event);
  53
  54    *EventHandle = Handle;
  55
  56    return Event;
  57 }
  58
  59 PKEVENT STDCALL
  60 IoCreateSynchronizationEvent(PUNICODE_STRING EventName,
  61                              PHANDLE EventHandle)
  62 {
  63    OBJECT_ATTRIBUTES ObjectAttributes;
  64    PKEVENT Event;
  65    HANDLE Handle;
  66    NTSTATUS Status;
  67
  68    InitializeObjectAttributes(&ObjectAttributes,
  69                               EventName,
  70                               OBJ_OPENIF,
  71                               NULL,
  72                               NULL);
  73
  74    Status = NtCreateEvent(&Handle,
  75                           EVENT_ALL_ACCESS,
  76                           &ObjectAttributes,
  77                           TRUE,
  78                           TRUE);
  79    if (!NT_SUCCESS(Status))
  80      {
  81         return NULL;
  82      }
  83
  84    ObReferenceObjectByHandle(Handle,
  85                              0,
  86                              ExEventObjectType,
  87                              KernelMode,
  88                              (PVOID*)&Event,
  89                              NULL);
  90    ObDereferenceObject(Event);
  91
  92    *EventHandle = Handle;
  93
  94    return Event;
  95 }
  96
  97 /* EOF */