tools/stats_viewer/win32.cs

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 using System;
   6 using System.Collections.Generic;
   7 using System.Runtime.InteropServices;
   8 using System.Text;
   9
  10 namespace StatsViewer {
  11   /// <summary>
  12   /// Win32 API constants, structs, and wrappers for access via C#.
  13   /// </summary>
  14   class Win32 {
  15     #region Constants
  16     public enum MapAccess {
  17       FILE_MAP_COPY = 0x0001,
  18       FILE_MAP_WRITE = 0x0002,
  19       FILE_MAP_READ = 0x0004,
  20       FILE_MAP_ALL_ACCESS = 0x001f,
  21     }
  22
  23     public const int GENERIC_READ = unchecked((int)0x80000000);
  24     public const int GENERIC_WRITE = unchecked((int)0x40000000);
  25     public const int OPEN_ALWAYS = 4;
  26     public static readonly IntPtr INVALID_HANDLE_VALUE = new IntPtr(-1);
  27     #endregion
  28
  29     [DllImport("kernel32", SetLastError=true, CharSet=CharSet.Auto)]
  30     public static extern IntPtr CreateFile (
  31        String lpFileName, int dwDesiredAccess, int dwShareMode,
  32        IntPtr lpSecurityAttributes, int dwCreationDisposition,
  33        int dwFlagsAndAttributes, IntPtr hTemplateFile);
  34
  35     [DllImport("kernel32", SetLastError=true)]
  36     public static extern IntPtr MapViewOfFile (
  37        IntPtr hFileMappingObject, int dwDesiredAccess, int dwFileOffsetHigh,
  38        int dwFileOffsetLow, int dwNumBytesToMap);
  39
  40     [DllImport("kernel32", SetLastError=true, CharSet=CharSet.Auto)]
  41     public static extern IntPtr OpenFileMapping (
  42        int dwDesiredAccess, bool bInheritHandle, String lpName);
  43
  44     [DllImport("kernel32", SetLastError=true)]
  45     public static extern bool UnmapViewOfFile (IntPtr lpBaseAddress);
  46
  47     [DllImport("kernel32", SetLastError = true)]
  48     public static extern bool CloseHandle(IntPtr handle);
  49   }
  50 }