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  *
   8  * PROGRAMMERS:     David Welch (welch@mcmail.com)
   9  */
  10
  11 /* INCLUDES *****************************************************************/
  12
  13 #include <ntoskrnl.h>
  14 #include <internal/debug.h>
  15
  16 /* FUNCTIONS *****************************************************************/
  17
  18 /*
  19  * @implemented
  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 = ZwCreateEvent(&Handle,
  37                           EVENT_ALL_ACCESS,
  38                           &ObjectAttributes,
  39                           NotificationEvent,
  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 /*
  60  * @implemented
  61  */
  62 PKEVENT STDCALL
  63 IoCreateSynchronizationEvent(PUNICODE_STRING EventName,
  64                              PHANDLE EventHandle)
  65 {
  66    OBJECT_ATTRIBUTES ObjectAttributes;
  67    KPROCESSOR_MODE PreviousMode;
  68    PKEVENT Event;
  69    HANDLE Handle;
  70    NTSTATUS Status;
  71
  72    PreviousMode = ExGetPreviousMode();
  73
  74    InitializeObjectAttributes(&ObjectAttributes,
  75                               EventName,
  76                               OBJ_OPENIF,
  77                               NULL,
  78                               NULL);
  79
  80    Status = ZwCreateEvent(&Handle,
  81                           EVENT_ALL_ACCESS,
  82                           &ObjectAttributes,
  83                           SynchronizationEvent,
  84                           TRUE);
  85
  86    if (!NT_SUCCESS(Status))
  87      {
  88         return NULL;
  89      }
  90
  91    ObReferenceObjectByHandle(Handle,
  92                              0,
  93                              ExEventObjectType,
  94                              KernelMode,
  95                              (PVOID*)&Event,
  96                              NULL);
  97    ObDereferenceObject(Event);
  98
  99    *EventHandle = Handle;
 100
 101    return Event;
 102 }
 103
 104 /* EOF */