reactos/ntoskrnl/ke/event.c

   1 /*
   2  * COPYRIGHT:       See COPYING in the top level directory
   3  * PROJECT:         ReactOS kernel
   4  * FILE:            ntoskrnl/ke/event.c
   5  * PURPOSE:         Implements events
   6  * PROGRAMMER:      David Welch (welch@mcmail.com)
   7  * UPDATE HISTORY:
   8  *                  Created 22/05/98
   9  */
  10
  11 /* INCLUDES *****************************************************************/
  12
  13 #include <ddk/ntddk.h>
  14 #include <internal/ke.h>
  15
  16 #define NDEBUG
  17 #include <internal/debug.h>
  18
  19 /* FUNCTIONS ****************************************************************/
  20
  21 VOID KeClearEvent(PKEVENT Event)
  22 {
  23    Event->Header.SignalState=FALSE;
  24 }
  25
  26 VOID KeInitializeEvent(PKEVENT Event, EVENT_TYPE Type, BOOLEAN State)
  27 {
  28    KeInitializeDispatcherHeader(&(Event->Header),Type,
  29                                 sizeof(Event)/sizeof(ULONG),State);
  30    InitializeListHead(&(Event->Header.WaitListHead));
  31 }
  32
  33 LONG KeReadStateEvent(PKEVENT Event)
  34 {
  35    return(Event->Header.SignalState);
  36 }
  37
  38 LONG KeResetEvent(PKEVENT Event)
  39 {
  40    return(InterlockedExchange(&(Event->Header.SignalState),0));
  41 }
  42
  43 LONG KeSetEvent(PKEVENT Event, KPRIORITY Increment, BOOLEAN Wait)
  44 {
  45    int ret;
  46
  47    DPRINT("KeSetEvent(Event %x, Wait %x)\n",Event,Wait);
  48    KeAcquireDispatcherDatabaseLock(Wait);
  49 //   ret = InterlockedExchange(&(Event->Header.SignalState),1);
  50    Event->Header.SignalState=1;
  51    KeDispatcherObjectWake((DISPATCHER_HEADER *)Event);
  52    KeReleaseDispatcherDatabaseLock(Wait);
  53 }