reactos/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 <ntoskrnl.h>
  15 #include <internal/debug.h>
  16
  17 /* FUNCTIONS *****************************************************************/
  18
  19 /*
  20  * @implemented
  21  */
  22 PKEVENT STDCALL
  23 IoCreateNotificationEvent(PUNICODE_STRING EventName,
  24                           PHANDLE EventHandle)
  25 {
  26    OBJECT_ATTRIBUTES ObjectAttributes;
  27    PKEVENT Event;
  28    HANDLE Handle;
  29    NTSTATUS Status;
  30
  31    InitializeObjectAttributes(&ObjectAttributes,
  32                               EventName,
  33                               OBJ_OPENIF,
  34                               NULL,
  35                               NULL);
  36
  37    Status = ZwCreateEvent(&Handle,
  38                           EVENT_ALL_ACCESS,
  39                           &ObjectAttributes,
  40                           NotificationEvent,
  41                           TRUE);
  42    if (!NT_SUCCESS(Status))
  43      {
  44         return NULL;
  45      }
  46
  47    ObReferenceObjectByHandle(Handle,
  48                              0,
  49                              ExEventObjectType,
  50                              KernelMode,
  51                              (PVOID*)&Event,
  52                              NULL);
  53    ObDereferenceObject(Event);
  54
  55    *EventHandle = Handle;
  56
  57    return Event;
  58 }
  59
  60 /*
  61  * @implemented
  62  */
  63 PKEVENT STDCALL
  64 IoCreateSynchronizationEvent(PUNICODE_STRING EventName,
  65                              PHANDLE EventHandle)
  66 {
  67    OBJECT_ATTRIBUTES ObjectAttributes;
  68    KPROCESSOR_MODE PreviousMode;
  69    PKEVENT Event;
  70    HANDLE Handle;
  71    NTSTATUS Status;
  72
  73    PreviousMode = ExGetPreviousMode();
  74
  75    InitializeObjectAttributes(&ObjectAttributes,
  76                               EventName,
  77                               OBJ_OPENIF,
  78                               NULL,
  79                               NULL);
  80
  81    Status = ZwCreateEvent(&Handle,
  82                           EVENT_ALL_ACCESS,
  83                           &ObjectAttributes,
  84                           SynchronizationEvent,
  85                           TRUE);
  86
  87    if (!NT_SUCCESS(Status))
  88      {
  89         return NULL;
  90      }
  91
  92    ObReferenceObjectByHandle(Handle,
  93                              0,
  94                              ExEventObjectType,
  95                              KernelMode,
  96                              (PVOID*)&Event,
  97                              NULL);
  98    ObDereferenceObject(Event);
  99
 100    *EventHandle = Handle;
 101
 102    return Event;
 103 }
 104
 105 /* EOF */