subsys/win32k/eng/device.c

   1 /*
   2  * COPYRIGHT:         See COPYING in the top level directory
   3  * PROJECT:           ReactOS kernel
   4  * PURPOSE:           GDI Driver Device Functions
   5  * FILE:              subsys/win32k/eng/device.c
   6  * PROGRAMER:         Jason Filby
   7  * REVISION HISTORY:
   8  *                 3/7/1999: Created
   9  */
  10
  11 #include <ddk/ntddk.h>
  12
  13 #define NDEBUG
  14 #include <debug.h>
  15
  16 DWORD STDCALL
  17 EngDeviceIoControl(HANDLE  hDevice,
  18                    DWORD   dwIoControlCode,
  19                    LPVOID  lpInBuffer,
  20                    DWORD   nInBufferSize,
  21                    LPVOID  lpOutBuffer,
  22                    DWORD   nOutBufferSize,
  23                    DWORD *lpBytesReturned)
  24 {
  25   PIRP Irp;
  26   NTSTATUS Status;
  27   KEVENT Event;
  28   IO_STATUS_BLOCK Iosb;
  29   PFILE_OBJECT FileObject;
  30
  31   DPRINT("EngDeviceIoControl() called\n");
  32
  33   KeInitializeEvent(&Event, SynchronizationEvent, FALSE);
  34
  35   Status = ObReferenceObjectByHandle(hDevice,
  36                                      FILE_READ_DATA | FILE_WRITE_DATA,
  37                                      IoFileObjectType,
  38                                      KernelMode,
  39                                      (PVOID *)&FileObject,
  40                                      NULL);
  41    if (!NT_SUCCESS(Status))
  42      {
  43         return(Status);
  44      }
  45
  46   Irp = IoBuildDeviceIoControlRequest(dwIoControlCode,
  47                                       FileObject->DeviceObject,
  48                                       lpInBuffer,
  49                                       nInBufferSize,
  50                                       lpOutBuffer,
  51                                       nOutBufferSize, FALSE, &Event, &Iosb);
  52
  53   Status = IoCallDriver(FileObject->DeviceObject, Irp);
  54
  55   if (Status == STATUS_PENDING)
  56   {
  57     (void) KeWaitForSingleObject(&Event, Executive, KernelMode, TRUE, 0);
  58   }
  59
  60   return (Status);
  61 }