reactos/dll/cpl/sysdm/virtmem.c
Hermès Bélusca-Maïto 04b2d35f5b
[SYSDM] Improvements for the Paging File settings dialog. (#4844)
- Implement the architecture-specific pagefile size limits.
  In particular, verify that the selected volume on which to create
  the page file can accomodate the theoretical maximum limit (e.g.
  FAT32 cannot accomodate a 16 TB pagefile on x64, and the limit must
  be lowered down to 4 GB).

- Change the IDS_WARNINITIALRANGE and IDS_WARNMAXIMUMRANGE strings
  so that the maximum limit mentioned is the dynamic one.

- Review, improve and fix other aspects of the code.

Parts of this PR: addendum to commits 4d2d2dbb2 (#2597), 3bee3b92a (#2706).
2022-11-16 21:55:23 +01:00

895 lines
26 KiB
C

/*
* PROJECT: ReactOS system properties, control panel applet
* LICENSE: GPL - See COPYING in the top level directory
* FILE: dll/cpl/sysdm/virtmem.c
* PURPOSE: Virtual memory control dialog
* COPYRIGHT: Copyright 2006 Ged Murphy <gedmurphy@gmail.com>
*
*/
#include "precomp.h"
#ifdef _M_IX86
/* Used for SharedUserData by GetMaxPageFileSize() in the PAE case */
#define NTOS_MODE_USER
#include <ndk/pstypes.h>
#endif
#define NDEBUG
#include <debug.h>
// #define MAX_PAGING_FILES 16 // See also ntoskrnl/include/internal/mm.h
#define MEGABYTE (1024 * 1024)
/* Values adapted from smss/pagefile.c, converted in megabytes and rounded-down.
* Compare to the more "accurate" values from SMSS (and NTOS) in bytes. */
/* Minimum pagefile size: 2 MB, instead of 256 pages (1 MB) */
#define MINIMUM_PAGEFILE_SIZE 2
/* Maximum pagefile sizes for different architectures */
#define MAXIMUM_PAGEFILE_SIZE32 (4UL * 1024 - 1)
#define MAXIMUM_PAGEFILE_SIZE64 (16UL * 1024 * 1024 - 1)
#if defined(_M_IX86)
/* 4095 MB */
#define MAXIMUM_PAGEFILE_SIZE MAXIMUM_PAGEFILE_SIZE32
/* PAE uses the same size as x64 */
#define MAXIMUM_PAGEFILE_SIZE_PAE MAXIMUM_PAGEFILE_SIZE64
#elif defined (_M_AMD64) || defined(_M_ARM64)
/* Around 16 TB */
#define MAXIMUM_PAGEFILE_SIZE MAXIMUM_PAGEFILE_SIZE64
#elif defined (_M_IA64)
/* Around 32 TB */
#define MAXIMUM_PAGEFILE_SIZE (32UL * 1024 * 1024 - 1)
#elif defined(_M_ARM)
/* Around 2 GB */
#if (NTDDI_VERSION >= NTDDI_WINBLUE) // NTDDI_WIN81
#define MAXIMUM_PAGEFILE_SIZE (2UL * 1024 - 1)
#else
/* Around 4 GB */
#define MAXIMUM_PAGEFILE_SIZE MAXIMUM_PAGEFILE_SIZE32
#endif
#else
/* On unknown architectures, default to either one of the 32 or 64 bit sizes */
#pragma message("Unknown architecture")
#ifdef _WIN64
#define MAXIMUM_PAGEFILE_SIZE MAXIMUM_PAGEFILE_SIZE64
#else
#define MAXIMUM_PAGEFILE_SIZE MAXIMUM_PAGEFILE_SIZE32
#endif
#endif
typedef struct _PAGEFILE
{
TCHAR szDrive[3];
LPTSTR pszVolume;
INT OldMinSize;
INT OldMaxSize;
INT NewMinSize;
INT NewMaxSize;
UINT FreeSize;
BOOL bIsNotFAT;
BOOL bUsed;
} PAGEFILE, *PPAGEFILE;
typedef struct _VIRTMEM
{
HWND hSelf;
HWND hListBox;
LPTSTR szPagingFiles;
UINT Count;
BOOL bModified;
PAGEFILE PageFile[26];
} VIRTMEM, *PVIRTMEM;
static __inline
UINT
GetMaxPageFileSize(
_In_ PPAGEFILE PageFile)
{
#ifdef _M_IX86
/* For x86 PAE-enabled systems, where the maximum pagefile size is
* greater than 4 GB, verify also that the drive's filesystem on which
* the pagefile is stored can support it. */
if (SharedUserData->ProcessorFeatures[PF_PAE_ENABLED] && PageFile->bIsNotFAT)
return min(PageFile->FreeSize, MAXIMUM_PAGEFILE_SIZE_PAE);
#endif
return min(PageFile->FreeSize, MAXIMUM_PAGEFILE_SIZE);
}
static LPCTSTR lpKey = _T("SYSTEM\\CurrentControlSet\\Control\\Session Manager\\Memory Management");
static BOOL
ReadPageFileSettings(PVIRTMEM pVirtMem)
{
BOOL bRet = FALSE;
HKEY hkey = NULL;
DWORD dwType;
DWORD dwDataSize;
if (RegCreateKeyEx(HKEY_LOCAL_MACHINE,
lpKey,
0,
NULL,
REG_OPTION_NON_VOLATILE,
KEY_QUERY_VALUE,
NULL,
&hkey,
NULL) == ERROR_SUCCESS)
{
if (RegQueryValueEx(hkey,
_T("PagingFiles"),
NULL,
&dwType,
NULL,
&dwDataSize) == ERROR_SUCCESS)
{
pVirtMem->szPagingFiles = (LPTSTR)HeapAlloc(GetProcessHeap(),
HEAP_ZERO_MEMORY,
dwDataSize);
if (pVirtMem->szPagingFiles != NULL)
{
if (RegQueryValueEx(hkey,
_T("PagingFiles"),
NULL,
&dwType,
(PBYTE)pVirtMem->szPagingFiles,
&dwDataSize) == ERROR_SUCCESS)
{
bRet = TRUE;
}
}
}
}
if (!bRet)
ShowLastWin32Error(pVirtMem->hSelf);
if (hkey != NULL)
RegCloseKey(hkey);
return bRet;
}
static VOID
GetPageFileSizes(LPTSTR lpPageFiles,
LPINT lpInitialSize,
LPINT lpMaximumSize)
{
UINT i = 0;
*lpInitialSize = -1;
*lpMaximumSize = -1;
while (*lpPageFiles != _T('\0'))
{
if (*lpPageFiles == _T(' '))
{
lpPageFiles++;
switch (i)
{
case 0:
*lpInitialSize = (INT)_ttoi(lpPageFiles);
i = 1;
break;
case 1:
*lpMaximumSize = (INT)_ttoi(lpPageFiles);
return;
}
}
lpPageFiles++;
}
}
static VOID
ParseMemSettings(PVIRTMEM pVirtMem)
{
TCHAR szDrives[1024]; // All drives
LPTSTR DrivePtr = szDrives;
TCHAR szDrive[3]; // Single drive
TCHAR szVolume[MAX_PATH + 1];
TCHAR szFSName[MAX_PATH + 1];
INT MinSize;
INT MaxSize;
INT DriveLen;
INT Len;
UINT PgCnt = 0;
PPAGEFILE PageFile;
DriveLen = GetLogicalDriveStrings(_countof(szDrives) - 1,
szDrives);
while (DriveLen != 0)
{
Len = lstrlen(DrivePtr) + 1;
DriveLen -= Len;
DrivePtr = _tcsupr(DrivePtr);
/* Copy the 'X:' portion */
lstrcpyn(szDrive, DrivePtr, _countof(szDrive));
if (GetDriveType(DrivePtr) == DRIVE_FIXED)
{
MinSize = -1;
MaxSize = -1;
/* Does drive match the one in the registry ? */
if (_tcsnicmp(pVirtMem->szPagingFiles, szDrive, 2) == 0)
{
GetPageFileSizes(pVirtMem->szPagingFiles,
&MinSize,
&MaxSize);
}
PageFile = &pVirtMem->PageFile[PgCnt];
PageFile->OldMinSize = MinSize;
PageFile->OldMaxSize = MaxSize;
PageFile->NewMinSize = MinSize;
PageFile->NewMaxSize = MaxSize;
PageFile->bIsNotFAT = TRUE; /* Suppose this is not a FAT volume */
PageFile->bUsed = TRUE;
lstrcpy(PageFile->szDrive, szDrive);
/* Get the volume label if there is one */
if (GetVolumeInformation(DrivePtr,
szVolume, _countof(szVolume),
NULL, NULL, NULL,
szFSName, _countof(szFSName)))
{
PageFile->pszVolume = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY,
(_tcslen(szVolume) + 1) * sizeof(TCHAR));
if (PageFile->pszVolume != NULL)
_tcscpy(PageFile->pszVolume, szVolume);
/*
* Check whether the volume is FAT, which cannot support files
* larger than 4GB (for FAT32 and FATX, and less for FAT16).
* This will limit the maximum size of the pagefile this volume
* can contain (see GetMaxPageFileSize()).
*/
PageFile->bIsNotFAT = (_tcsnicmp(szFSName, _T("FAT"), 3) != 0);
}
PgCnt++;
}
DrivePtr += Len;
}
pVirtMem->Count = PgCnt;
}
static VOID
WritePageFileSettings(PVIRTMEM pVirtMem)
{
BOOL bErr = TRUE;
HKEY hk = NULL;
TCHAR szText[256];
TCHAR szPagingFiles[2048];
UINT i, nPos = 0;
PPAGEFILE PageFile;
for (i = 0; i < pVirtMem->Count; ++i)
{
PageFile = &pVirtMem->PageFile[i];
if (PageFile->bUsed &&
PageFile->NewMinSize != -1 &&
PageFile->NewMaxSize != -1)
{
_stprintf(szText,
_T("%s\\pagefile.sys %i %i"),
PageFile->szDrive,
PageFile->NewMinSize,
PageFile->NewMaxSize);
/* Add it to our overall registry string */
lstrcpy(szPagingFiles + nPos, szText);
/* Record the position where the next string will start */
nPos += (UINT)lstrlen(szText) + 1;
/* Add another NULL for REG_MULTI_SZ */
szPagingFiles[nPos] = _T('\0');
nPos++;
}
}
if (RegCreateKeyEx(HKEY_LOCAL_MACHINE,
lpKey,
0,
NULL,
REG_OPTION_NON_VOLATILE,
KEY_WRITE,
NULL,
&hk,
NULL) == ERROR_SUCCESS)
{
if (RegSetValueEx(hk,
_T("PagingFiles"),
0,
REG_MULTI_SZ,
(LPBYTE)szPagingFiles,
(DWORD)nPos * sizeof(TCHAR)) == ERROR_SUCCESS)
{
bErr = FALSE;
}
RegCloseKey(hk);
}
if (bErr == FALSE)
{
/* Delete obsolete paging files on the next boot */
for (i = 0; i < _countof(pVirtMem->PageFile); i++)
{
if (pVirtMem->PageFile[i].OldMinSize != -1 &&
pVirtMem->PageFile[i].NewMinSize == -1)
{
_stprintf(szText,
_T("%s\\pagefile.sys"),
pVirtMem->PageFile[i].szDrive);
MoveFileEx(szText, NULL, MOVEFILE_DELAY_UNTIL_REBOOT);
}
}
}
if (bErr)
ShowLastWin32Error(pVirtMem->hSelf);
}
static VOID
SetListBoxColumns(HWND hwndListBox)
{
RECT rect = {0, 0, 103, 0};
MapDialogRect(hwndListBox, &rect);
SendMessage(hwndListBox, LB_SETTABSTOPS, (WPARAM)1, (LPARAM)&rect.right);
}
static VOID
OnNoPagingFile(PVIRTMEM pVirtMem)
{
/* Disable the page file custom size boxes */
EnableWindow(GetDlgItem(pVirtMem->hSelf, IDC_INITIALSIZE), FALSE);
EnableWindow(GetDlgItem(pVirtMem->hSelf, IDC_MAXSIZE), FALSE);
}
static VOID
OnSysManSize(PVIRTMEM pVirtMem)
{
/* Disable the page file custom size boxes */
EnableWindow(GetDlgItem(pVirtMem->hSelf, IDC_INITIALSIZE), FALSE);
EnableWindow(GetDlgItem(pVirtMem->hSelf, IDC_MAXSIZE), FALSE);
}
static VOID
OnCustom(PVIRTMEM pVirtMem)
{
/* Enable the page file custom size boxes */
EnableWindow(GetDlgItem(pVirtMem->hSelf, IDC_INITIALSIZE), TRUE);
EnableWindow(GetDlgItem(pVirtMem->hSelf, IDC_MAXSIZE), TRUE);
}
static BOOL OnSelChange(PVIRTMEM pVirtMem);
static VOID
InitPagefileList(PVIRTMEM pVirtMem)
{
INT Index;
UINT i;
PPAGEFILE PageFile;
TCHAR szSize[64];
TCHAR szDisplayString[256];
for (i = 0; i < _countof(pVirtMem->PageFile); i++)
{
PageFile = &pVirtMem->PageFile[i];
if (PageFile->bUsed)
{
if ((PageFile->NewMinSize == -1) &&
(PageFile->NewMaxSize == -1))
{
LoadString(hApplet,
IDS_PAGEFILE_NONE,
szSize,
_countof(szSize));
}
else if ((PageFile->NewMinSize == 0) &&
(PageFile->NewMaxSize == 0))
{
LoadString(hApplet,
IDS_PAGEFILE_SYSTEM,
szSize,
_countof(szSize));
}
else
{
_stprintf(szSize, _T("%d - %d"),
PageFile->NewMinSize,
PageFile->NewMaxSize);
}
_stprintf(szDisplayString,
_T("%s [%s]\t%s"),
PageFile->szDrive,
PageFile->pszVolume ? PageFile->pszVolume : _T(""),
szSize);
Index = SendMessage(pVirtMem->hListBox, LB_ADDSTRING, (WPARAM)0, (LPARAM)szDisplayString);
SendMessage(pVirtMem->hListBox, LB_SETITEMDATA, Index, i);
}
}
SendMessage(pVirtMem->hListBox, LB_SETCURSEL, (WPARAM)0, (LPARAM)0);
OnSelChange(pVirtMem);
}
static VOID
UpdatePagefileEntry(PVIRTMEM pVirtMem,
INT ListIndex,
INT DriveIndex)
{
PPAGEFILE PageFile = &pVirtMem->PageFile[DriveIndex];
TCHAR szSize[64];
TCHAR szDisplayString[256];
if ((PageFile->NewMinSize == -1) &&
(PageFile->NewMaxSize == -1))
{
LoadString(hApplet,
IDS_PAGEFILE_NONE,
szSize,
_countof(szSize));
}
else if ((PageFile->NewMinSize == 0) &&
(PageFile->NewMaxSize == 0))
{
LoadString(hApplet,
IDS_PAGEFILE_SYSTEM,
szSize,
_countof(szSize));
}
else
{
_stprintf(szSize,
_T("%d - %d"),
PageFile->NewMinSize,
PageFile->NewMaxSize);
}
_stprintf(szDisplayString,
_T("%s [%s]\t%s"),
PageFile->szDrive,
PageFile->pszVolume ? PageFile->pszVolume : _T(""),
szSize);
SendMessage(pVirtMem->hListBox, LB_DELETESTRING, (WPARAM)ListIndex, 0);
SendMessage(pVirtMem->hListBox, LB_INSERTSTRING, (WPARAM)ListIndex, (LPARAM)szDisplayString);
SendMessage(pVirtMem->hListBox, LB_SETCURSEL, (WPARAM)ListIndex, 0);
}
static VOID
OnSet(PVIRTMEM pVirtMem)
{
INT Index;
UINT MinSize = -1;
UINT MaxSize = -1;
BOOL bTranslated;
UINT DriveIndex;
PPAGEFILE PageFile;
Index = (INT)SendDlgItemMessage(pVirtMem->hSelf,
IDC_PAGEFILELIST,
LB_GETCURSEL,
0,
0);
if (Index >= 0 && Index < pVirtMem->Count)
{
DriveIndex = SendDlgItemMessage(pVirtMem->hSelf,
IDC_PAGEFILELIST,
LB_GETITEMDATA,
(WPARAM)Index,
0);
PageFile = &pVirtMem->PageFile[DriveIndex];
/* Check if custom settings are checked */
if (IsDlgButtonChecked(pVirtMem->hSelf,
IDC_CUSTOM) == BST_CHECKED)
{
UINT maxPageFileSize;
MinSize = GetDlgItemInt(pVirtMem->hSelf,
IDC_INITIALSIZE,
&bTranslated,
FALSE);
if (!bTranslated)
{
ResourceMessageBox(hApplet,
NULL,
MB_ICONWARNING | MB_OK,
IDS_MESSAGEBOXTITLE,
IDS_WARNINITIALSIZE);
return;
}
MaxSize = GetDlgItemInt(pVirtMem->hSelf,
IDC_MAXSIZE,
&bTranslated,
FALSE);
if (!bTranslated)
{
ResourceMessageBox(hApplet,
NULL,
MB_ICONWARNING | MB_OK,
IDS_MESSAGEBOXTITLE,
IDS_WARNMAXIMUMSIZE);
return;
}
maxPageFileSize = GetMaxPageFileSize(PageFile);
/* Check the valid range of the minimum size */
if ((MinSize < MINIMUM_PAGEFILE_SIZE) ||
(MinSize > maxPageFileSize))
{
ResourceMessageBox(hApplet,
NULL,
MB_ICONWARNING | MB_OK,
IDS_MESSAGEBOXTITLE,
IDS_WARNINITIALRANGE,
maxPageFileSize);
return;
}
/* Check the valid range of the maximum size */
if ((MaxSize < MinSize) ||
(MaxSize > maxPageFileSize))
{
ResourceMessageBox(hApplet,
NULL,
MB_ICONWARNING | MB_OK,
IDS_MESSAGEBOXTITLE,
IDS_WARNMAXIMUMRANGE,
maxPageFileSize);
return;
}
// TODO: Check how much disk space would remain after
// storing a pagefile of a certain size. Warn/error out
// if less than 5 MB would remain.
PageFile->NewMinSize = MinSize;
PageFile->NewMaxSize = MaxSize;
PageFile->bUsed = TRUE;
}
else if (IsDlgButtonChecked(pVirtMem->hSelf,
IDC_NOPAGEFILE) == BST_CHECKED)
{
/* No pagefile */
PageFile->NewMinSize = -1;
PageFile->NewMaxSize = -1;
PageFile->bUsed = TRUE;
}
else
{
/* System managed size*/
PageFile->NewMinSize = 0;
PageFile->NewMaxSize = 0;
PageFile->bUsed = TRUE;
}
/* Set the modified flag if min or max size has changed */
if ((PageFile->OldMinSize != PageFile->NewMinSize) ||
(PageFile->OldMaxSize != PageFile->NewMaxSize))
{
pVirtMem->bModified = TRUE;
}
UpdatePagefileEntry(pVirtMem, Index, DriveIndex);
}
}
static BOOL
OnSelChange(PVIRTMEM pVirtMem)
{
INT Index;
UINT DriveIndex;
PPAGEFILE PageFile;
MEMORYSTATUSEX MemoryStatus;
ULARGE_INTEGER FreeDiskSpace;
UINT i, PageFileSizeMb;
TCHAR szMegabytes[8];
TCHAR szBuffer[64];
TCHAR szText[MAX_PATH];
WIN32_FIND_DATA fdata = {0};
HANDLE hFind;
ULARGE_INTEGER pfSize;
Index = (INT)SendDlgItemMessage(pVirtMem->hSelf,
IDC_PAGEFILELIST,
LB_GETCURSEL,
0,
0);
if (Index >= 0 && Index < pVirtMem->Count)
{
DriveIndex = SendDlgItemMessage(pVirtMem->hSelf,
IDC_PAGEFILELIST,
LB_GETITEMDATA,
(WPARAM)Index,
0);
PageFile = &pVirtMem->PageFile[DriveIndex];
LoadString(hApplet,
IDS_PAGEFILE_MB,
szMegabytes,
_countof(szMegabytes));
/* Set drive letter */
SetDlgItemText(pVirtMem->hSelf, IDC_DRIVE,
PageFile->szDrive);
/* Set available disk space */
if (GetDiskFreeSpaceEx(PageFile->szDrive,
NULL, NULL, &FreeDiskSpace))
{
PageFile->FreeSize = (UINT)(FreeDiskSpace.QuadPart / MEGABYTE);
_stprintf(szBuffer, szMegabytes, PageFile->FreeSize);
SetDlgItemText(pVirtMem->hSelf, IDC_SPACEAVAIL, szBuffer);
}
if (PageFile->NewMinSize == -1 &&
PageFile->NewMaxSize == -1)
{
/* No pagefile */
OnNoPagingFile(pVirtMem);
CheckDlgButton(pVirtMem->hSelf, IDC_NOPAGEFILE, BST_CHECKED);
}
else if (PageFile->NewMinSize == 0 &&
PageFile->NewMaxSize == 0)
{
/* System managed size */
OnSysManSize(pVirtMem);
CheckDlgButton(pVirtMem->hSelf, IDC_SYSMANSIZE, BST_CHECKED);
}
else
{
/* Custom size */
/* Enable and fill the custom values */
OnCustom(pVirtMem);
SetDlgItemInt(pVirtMem->hSelf,
IDC_INITIALSIZE,
PageFile->NewMinSize,
FALSE);
SetDlgItemInt(pVirtMem->hSelf,
IDC_MAXSIZE,
PageFile->NewMaxSize,
FALSE);
CheckDlgButton(pVirtMem->hSelf,
IDC_CUSTOM,
BST_CHECKED);
}
/* Set minimum pagefile size */
_stprintf(szBuffer, szMegabytes, MINIMUM_PAGEFILE_SIZE);
SetDlgItemText(pVirtMem->hSelf, IDC_MINIMUM, szBuffer);
/* Set recommended pagefile size */
MemoryStatus.dwLength = sizeof(MemoryStatus);
if (GlobalMemoryStatusEx(&MemoryStatus))
{
UINT FreeMemMb, RecoMemMb;
UINT maxPageFileSize = GetMaxPageFileSize(PageFile);
FreeMemMb = (UINT)(MemoryStatus.ullTotalPhys / MEGABYTE);
/* The recommended VM size is 150% of free memory */
RecoMemMb = FreeMemMb + (FreeMemMb / 2);
if (RecoMemMb > maxPageFileSize)
RecoMemMb = maxPageFileSize;
_stprintf(szBuffer, szMegabytes, RecoMemMb);
SetDlgItemText(pVirtMem->hSelf, IDC_RECOMMENDED, szBuffer);
}
/* Set current pagefile size */
PageFileSizeMb = 0;
for (i = 0; i < pVirtMem->Count; i++)
{
_stprintf(szText,
_T("%c:\\pagefile.sys"),
pVirtMem->PageFile[i].szDrive[0]);
hFind = FindFirstFile(szText, &fdata);
if (hFind == INVALID_HANDLE_VALUE)
{
// FIXME: MsgBox error?
DPRINT1("Unable to read PageFile size: %ls due to error %d\n",
szText, GetLastError());
}
else
{
pfSize.LowPart = fdata.nFileSizeLow;
pfSize.HighPart = fdata.nFileSizeHigh;
PageFileSizeMb += pfSize.QuadPart / MEGABYTE;
FindClose(hFind);
}
}
_stprintf(szBuffer, szMegabytes, PageFileSizeMb);
SetDlgItemText(pVirtMem->hSelf, IDC_CURRENT, szBuffer);
}
return TRUE;
}
static VOID
OnVirtMemDialogOk(PVIRTMEM pVirtMem)
{
if (pVirtMem->bModified != FALSE)
{
ResourceMessageBox(hApplet,
NULL,
MB_ICONINFORMATION | MB_OK,
IDS_MESSAGEBOXTITLE,
IDS_INFOREBOOT);
WritePageFileSettings(pVirtMem);
}
}
static VOID
OnInitVirtMemDialog(HWND hwnd, PVIRTMEM pVirtMem)
{
UINT i;
PPAGEFILE PageFile;
pVirtMem->hSelf = hwnd;
pVirtMem->hListBox = GetDlgItem(hwnd, IDC_PAGEFILELIST);
pVirtMem->bModified = FALSE;
SetListBoxColumns(pVirtMem->hListBox);
for (i = 0; i < _countof(pVirtMem->PageFile); i++)
{
PageFile = &pVirtMem->PageFile[i];
PageFile->bUsed = FALSE;
PageFile->OldMinSize = -1;
PageFile->OldMaxSize = -1;
PageFile->NewMinSize = -1;
PageFile->NewMaxSize = -1;
PageFile->FreeSize = 0;
PageFile->bIsNotFAT = TRUE; /* Suppose this is not a FAT volume */
}
/* Load the pagefile systems from the reg */
ReadPageFileSettings(pVirtMem);
/* Parse our settings and set up dialog */
ParseMemSettings(pVirtMem);
InitPagefileList(pVirtMem);
}
static VOID
OnDestroy(PVIRTMEM pVirtMem)
{
UINT i;
for (i = 0; i < _countof(pVirtMem->PageFile); i++)
{
if (pVirtMem->PageFile[i].pszVolume != NULL)
HeapFree(GetProcessHeap(), 0, pVirtMem->PageFile[i].pszVolume);
}
if (pVirtMem->szPagingFiles)
HeapFree(GetProcessHeap(), 0, pVirtMem->szPagingFiles);
HeapFree(GetProcessHeap(), 0, pVirtMem);
}
INT_PTR CALLBACK
VirtMemDlgProc(HWND hwndDlg,
UINT uMsg,
WPARAM wParam,
LPARAM lParam)
{
PVIRTMEM pVirtMem;
UNREFERENCED_PARAMETER(lParam);
pVirtMem = (PVIRTMEM)GetWindowLongPtr(hwndDlg, DWLP_USER);
switch (uMsg)
{
case WM_INITDIALOG:
{
pVirtMem = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(VIRTMEM));
if (pVirtMem == NULL)
{
EndDialog(hwndDlg, 0);
return FALSE;
}
SetWindowLongPtr(hwndDlg, DWLP_USER, (LONG_PTR)pVirtMem);
OnInitVirtMemDialog(hwndDlg, pVirtMem);
break;
}
case WM_DESTROY:
OnDestroy(pVirtMem);
break;
case WM_COMMAND:
switch (LOWORD(wParam))
{
case IDCANCEL:
EndDialog(hwndDlg, 0);
return TRUE;
case IDOK:
OnVirtMemDialogOk(pVirtMem);
EndDialog(hwndDlg, pVirtMem->bModified);
return TRUE;
case IDC_NOPAGEFILE:
OnNoPagingFile(pVirtMem);
return TRUE;
case IDC_SYSMANSIZE:
OnSysManSize(pVirtMem);
return TRUE;
case IDC_CUSTOM:
OnCustom(pVirtMem);
return TRUE;
case IDC_SET:
OnSet(pVirtMem);
return TRUE;
case IDC_PAGEFILELIST:
switch (HIWORD(wParam))
{
case LBN_SELCHANGE:
OnSelChange(pVirtMem);
return TRUE;
}
break;
}
break;
}
return FALSE;
}