reactos/subsys/smss/initpage.c

   1 /* $Id: init.c 13449 2005-02-06 21:55:07Z ea $
   2  *
   3  * initpage.c -
   4  *
   5  * ReactOS Operating System
   6  *
   7  * --------------------------------------------------------------------
   8  *
   9  * This software is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU General Public License as
  11  * published by the Free Software Foundation; either version 2 of the
  12  * License, or (at your option) any later version.
  13  *
  14  * This software is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this software; see the file COPYING.LIB. If not, write
  21  * to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge,
  22  * MA 02139, USA.
  23  *
  24  * --------------------------------------------------------------------
  25  */
  26 #include "smss.h"
  27 #include <rosrtl/string.h>
  28 #include <wchar.h>
  29
  30 #define NDEBUG
  31 #include <debug.h>
  32
  33 static NTSTATUS STDCALL
  34 SmpPagingFilesQueryRoutine(PWSTR ValueName,
  35                           ULONG ValueType,
  36                           PVOID ValueData,
  37                           ULONG ValueLength,
  38                           PVOID Context,
  39                           PVOID EntryContext)
  40 {
  41   UNICODE_STRING FileName;
  42   LARGE_INTEGER InitialSize;
  43   LARGE_INTEGER MaximumSize;
  44   NTSTATUS Status;
  45   LPWSTR p;
  46
  47   DPRINT("ValueName '%S'  Type %lu  Length %lu\n", ValueName, ValueType, ValueLength);
  48   DPRINT("ValueData '%S'\n", (PWSTR)ValueData);
  49
  50   if (ValueType != REG_SZ)
  51     {
  52       return(STATUS_SUCCESS);
  53     }
  54
  55   /*
  56    * Format: "<path>[ <initial_size>[ <maximum_size>]]"
  57    */
  58   if ((p = wcschr(ValueData, ' ')) != NULL)
  59     {
  60       *p = L'\0';
  61       InitialSize.QuadPart = wcstoul(p + 1, &p, 0) * 256 * 4096;
  62       if (*p == ' ')
  63         {
  64           MaximumSize.QuadPart = wcstoul(p + 1, NULL, 0) * 256 * 4096;
  65         }
  66       else
  67         MaximumSize = InitialSize;
  68     }
  69   else
  70     {
  71       InitialSize.QuadPart = 50 * 4096;
  72       MaximumSize.QuadPart = 80 * 4096;
  73     }
  74
  75   if (!RtlDosPathNameToNtPathName_U ((LPWSTR)ValueData,
  76                                      &FileName,
  77                                      NULL,
  78                                      NULL))
  79     {
  80       return (STATUS_SUCCESS);
  81     }
  82
  83   DPRINT("SMSS: Created paging file %wZ with size %dKB\n",
  84          &FileName, InitialSize.QuadPart / 1024);
  85   Status = NtCreatePagingFile(&FileName,
  86                               &InitialSize,
  87                               &MaximumSize,
  88                               0);
  89
  90   RtlFreeUnicodeString(&FileName);
  91
  92   return(STATUS_SUCCESS);
  93 }
  94
  95
  96 NTSTATUS
  97 SmCreatePagingFiles(VOID)
  98 {
  99   RTL_QUERY_REGISTRY_TABLE QueryTable[2];
 100   NTSTATUS Status;
 101
 102   DPRINT("SM: creating system paging files\n");
 103   /*
 104    * Disable paging file on MiniNT/Live CD.
 105    */
 106   if (RtlCheckRegistryKey(RTL_REGISTRY_CONTROL, L"MiniNT") == STATUS_SUCCESS)
 107     {
 108       return STATUS_SUCCESS;
 109     }
 110
 111   RtlZeroMemory(&QueryTable,
 112                 sizeof(QueryTable));
 113
 114   QueryTable[0].Name = L"PagingFiles";
 115   QueryTable[0].QueryRoutine = SmpPagingFilesQueryRoutine;
 116
 117   Status = RtlQueryRegistryValues(RTL_REGISTRY_CONTROL,
 118                                   L"\\Session Manager\\Memory Management",
 119                                   QueryTable,
 120                                   NULL,
 121                                   NULL);
 122
 123   return(Status);
 124 }
 125
 126
 127 /* EOF */