reactos/ntoskrnl/io/iomgr.c

   1 /*
   2  * COPYRIGHT:            See COPYING in the top level directory
   3  * PROJECT:              ReactOS kernel
   4  * FILE:                 ntoskrnl/io/iomgr.c
   5  * PURPOSE:              Initializes the io manager
   6  * PROGRAMMER:           David Welch (welch@mcmail.com)
   7  * REVISION HISTORY:
   8  *             29/07/98: Created
   9  */
  10
  11 /* INCLUDES ****************************************************************/
  12
  13 #include <windows.h>
  14 #include <ddk/ntddk.h>
  15 #include <internal/ob.h>
  16 #include <internal/io.h>
  17
  18 #define NDEBUG
  19 #include <internal/debug.h>
  20
  21 /* GLOBALS *******************************************************************/
  22
  23 POBJECT_TYPE IoDeviceType = NULL;
  24 POBJECT_TYPE IoFileType = NULL;
  25
  26
  27 /* FUNCTIONS ****************************************************************/
  28
  29 VOID IoInit(VOID)
  30 {
  31    OBJECT_ATTRIBUTES attr;
  32    HANDLE handle;
  33    UNICODE_STRING UnicodeString;
  34    ANSI_STRING AnsiString;
  35
  36    /*
  37     * Register iomgr types
  38     */
  39    IoDeviceType = ExAllocatePool(NonPagedPool,sizeof(OBJECT_TYPE));
  40
  41    IoDeviceType->TotalObjects = 0;
  42    IoDeviceType->TotalHandles = 0;
  43    IoDeviceType->MaxObjects = ULONG_MAX;
  44    IoDeviceType->MaxHandles = ULONG_MAX;
  45    IoDeviceType->PagedPoolCharge = 0;
  46    IoDeviceType->NonpagedPoolCharge = sizeof(DEVICE_OBJECT);
  47    IoDeviceType->Dump = NULL;
  48    IoDeviceType->Open = NULL;
  49    IoDeviceType->Close = NULL;
  50    IoDeviceType->Delete = NULL;
  51    IoDeviceType->Parse = NULL;
  52    IoDeviceType->Security = NULL;
  53    IoDeviceType->QueryName = NULL;
  54    IoDeviceType->OkayToClose = NULL;
  55
  56    RtlInitAnsiString(&AnsiString,"Device");
  57    RtlAnsiStringToUnicodeString(&IoDeviceType->TypeName,&AnsiString,TRUE);
  58
  59    IoFileType = ExAllocatePool(NonPagedPool,sizeof(OBJECT_TYPE));
  60
  61    IoFileType->TotalObjects = 0;
  62    IoFileType->TotalHandles = 0;
  63    IoFileType->MaxObjects = ULONG_MAX;
  64    IoFileType->MaxHandles = ULONG_MAX;
  65    IoFileType->PagedPoolCharge = 0;
  66    IoFileType->NonpagedPoolCharge = sizeof(FILE_OBJECT);
  67    IoFileType->Dump = NULL;
  68    IoFileType->Open = NULL;
  69    IoFileType->Close = NULL;
  70    IoFileType->Delete = NULL;
  71    IoFileType->Parse = NULL;
  72    IoFileType->Security = NULL;
  73    IoFileType->QueryName = NULL;
  74    IoFileType->OkayToClose = NULL;
  75
  76    RtlInitAnsiString(&AnsiString,"File");
  77    RtlAnsiStringToUnicodeString(&IoFileType->TypeName,&AnsiString,TRUE);
  78
  79    /*
  80     * Create the device directory
  81     */
  82    RtlInitAnsiString(&AnsiString,"\\Device");
  83    RtlAnsiStringToUnicodeString(&UnicodeString,&AnsiString,TRUE);
  84    InitializeObjectAttributes(&attr,&UnicodeString,0,NULL,NULL);
  85    ZwCreateDirectoryObject(&handle,0,&attr);
  86
  87    RtlInitAnsiString(&AnsiString,"\\??");
  88    RtlAnsiStringToUnicodeString(&UnicodeString,&AnsiString,TRUE);
  89    InitializeObjectAttributes(&attr,&UnicodeString,0,NULL,NULL);
  90    ZwCreateDirectoryObject(&handle,0,&attr);
  91
  92    IoInitCancelHandling();
  93    IoInitSymbolicLinkImplementation();
  94    IoInitFileSystemImplementation();
  95 }