reactos/ntoskrnl/io/iomgr/ioevent.c

   1 /*
   2  * PROJECT:         ReactOS Kernel
   3  * LICENSE:         GPL - See COPYING in the top level directory
   4  * FILE:            ntoskrnl/io/event.c
   5  * PURPOSE:         I/O Wrappers for the Executive Event Functions
   6  * PROGRAMMERS:     Alex Ionescu (alex.ionescu@reactos.org)
   7  *                  Eric Kohl
   8  */
   9
  10 /* INCLUDES *****************************************************************/
  11
  12 #include <ntoskrnl.h>
  13 #include <debug.h>
  14
  15 /* PRIVATE FUNCTIONS *********************************************************/
  16
  17 PKEVENT
  18 NTAPI
  19 IopCreateEvent(IN PUNICODE_STRING EventName,
  20                IN PHANDLE EventHandle,
  21                IN EVENT_TYPE Type)
  22 {
  23     OBJECT_ATTRIBUTES ObjectAttributes;
  24     PKEVENT Event;
  25     HANDLE Handle;
  26     NTSTATUS Status;
  27     PAGED_CODE();
  28
  29     /* Initialize the object attributes */
  30     InitializeObjectAttributes(&ObjectAttributes,
  31                                EventName,
  32                                OBJ_OPENIF | OBJ_KERNEL_HANDLE,
  33                                NULL,
  34                                NULL);
  35
  36     /* Create the event */
  37     Status = ZwCreateEvent(&Handle,
  38                            EVENT_ALL_ACCESS,
  39                            &ObjectAttributes,
  40                            Type,
  41                            TRUE);
  42     if (!NT_SUCCESS(Status)) return NULL;
  43
  44     /* Get a handle to it */
  45     Status = ObReferenceObjectByHandle(Handle,
  46                                        0,
  47                                        ExEventObjectType,
  48                                        KernelMode,
  49                                        (PVOID*)&Event,
  50                                        NULL);
  51     if (!NT_SUCCESS(Status))
  52     {
  53         ZwClose(Handle);
  54         return NULL;
  55     }
  56
  57     /* Dereference the extra count, and return the handle */
  58     ObDereferenceObject(Event);
  59     *EventHandle = Handle;
  60     return Event;
  61 }
  62
  63 /* PUBLIC FUNCTIONS **********************************************************/
  64
  65 /*
  66  * @implemented
  67  */
  68 PKEVENT
  69 NTAPI
  70 IoCreateNotificationEvent(IN PUNICODE_STRING EventName,
  71                           IN PHANDLE EventHandle)
  72 {
  73     /* Call the internal API */
  74     return IopCreateEvent(EventName, EventHandle, NotificationEvent);
  75 }
  76
  77 /*
  78  * @implemented
  79  */
  80 PKEVENT
  81 NTAPI
  82 IoCreateSynchronizationEvent(IN PUNICODE_STRING EventName,
  83                              IN PHANDLE EventHandle)
  84 {
  85     /* Call the internal API */
  86     return IopCreateEvent(EventName, EventHandle, SynchronizationEvent);
  87 }
  88
  89 /* EOF */