reactos/ntoskrnl/io/page.c

   1 /* $Id: page.c,v 1.8 2000/04/07 02:23:59 dwelch Exp $
   2  *
   3  * COPYRIGHT:       See COPYING in the top level directory
   4  * PROJECT:         ReactOS kernel
   5  * FILE:            ntoskrnl/ke/bug.c
   6  * PURPOSE:         Graceful system shutdown if a bug is detected
   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 <internal/io.h>
  16
  17 #define NDEBUG
  18 #include <internal/debug.h>
  19
  20 /* FUNCTIONS *****************************************************************/
  21
  22 NTSTATUS STDCALL IoPageRead(PFILE_OBJECT FileObject,
  23                             PMDL Mdl,
  24                             PLARGE_INTEGER Offset,
  25                             PIO_STATUS_BLOCK StatusBlock)
  26 {
  27    PIRP Irp;
  28    KEVENT Event;
  29    PIO_STACK_LOCATION StackPtr;
  30    NTSTATUS Status;
  31
  32    DPRINT("IoPageRead(FileObject %x, Mdl %x)\n",
  33           FileObject, Mdl);
  34
  35    ObReferenceObjectByPointer(FileObject,
  36                               STANDARD_RIGHTS_REQUIRED,
  37                               IoFileObjectType,
  38                               UserMode);
  39
  40    KeInitializeEvent(&Event,NotificationEvent,FALSE);
  41    Irp = IoBuildSynchronousFsdRequestWithMdl(IRP_MJ_READ,
  42                                              FileObject->DeviceObject,
  43                                              Mdl,
  44                                              Offset,
  45                                              &Event,
  46                                              StatusBlock);
  47    StackPtr = IoGetNextIrpStackLocation(Irp);
  48    StackPtr->FileObject = FileObject;
  49    DPRINT("Before IoCallDriver\n");
  50    Status = IoCallDriver(FileObject->DeviceObject,Irp);
  51    DPRINT("Status %d STATUS_PENDING %d\n",Status,STATUS_PENDING);
  52    if (Status==STATUS_PENDING && (FileObject->Flags & FO_SYNCHRONOUS_IO))
  53      {
  54         DPRINT("Waiting for io operation\n");
  55         if (FileObject->Flags & FO_ALERTABLE_IO)
  56           {
  57              KeWaitForSingleObject(&Event,Executive,KernelMode,TRUE,NULL);
  58           }
  59         else
  60           {
  61              DPRINT("Non-alertable wait\n");
  62              KeWaitForSingleObject(&Event,Executive,KernelMode,FALSE,NULL);
  63           }
  64         Status = StatusBlock->Status;
  65      }
  66    return(Status);
  67 }
  68
  69
  70 NTSTATUS STDCALL IoSynchronousPageWrite (DWORD  Unknown0,
  71                                          DWORD  Unknown1,
  72                                          DWORD  Unknown2,
  73                                          DWORD  Unknown3,
  74                                          DWORD  Unknown4)
  75 {
  76    UNIMPLEMENTED;
  77    return (STATUS_NOT_IMPLEMENTED);
  78 }
  79
  80
  81 /* EOF */