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WinIo.cpp
资源名称：winio源码.zip　[点击查看]
上传用户：ason123
上传日期：2010-03-31
资源大小：177k
文件大小：3k
源码类别：

并口编程

开发平台：

C++ Builder

WinIo.cpp：源码内容
  1. // ---------------------------------------------------- //
  2. //                      WinIo v2.0                      //
  3. //  Direct Hardware Access Under Windows 9x/NT/2000/XP  //
  4. //           Copyright 1998-2002 Yariv Kaplan           //
  5. //               http://www.internals.com               //
  6. // ---------------------------------------------------- //
  8. #include <windows.h>
  9. #include <winioctl.h>
  10. #include "k32call.h"
  11. #include "phys32.h"
  12. #include "..drvntwinio_nt.h"
  13. #include "winio.h"
  15. HANDLE hDriver = INVALID_HANDLE_VALUE;
  16. bool IsNT;
  17. bool IsWinIoInitialized = false;
  18. char szWinIoDriverPath[MAX_PATH];
  21. bool IsWinNT()
  22. {
  23.   OSVERSIONINFO OSVersionInfo;
  25.   OSVersionInfo.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
  27.   GetVersionEx(&OSVersionInfo);
  29.   return OSVersionInfo.dwPlatformId == VER_PLATFORM_WIN32_NT;
  30. }
  33. bool GetDriverPath()
  34. {
  35.   PSTR pszSlash;
  37.   if (!GetModuleFileName(GetModuleHandle(NULL), szWinIoDriverPath, sizeof(szWinIoDriverPath)))
  38.     return false;
  40.   pszSlash = strrchr(szWinIoDriverPath, '\');
  42.   if (pszSlash)
  43.     pszSlash[1] = 0;
  44.   else
  45.     return false;
  47.   strcat(szWinIoDriverPath, "winio.sys");
  49.   return true;
  50. }
  53. bool _stdcall InitializeWinIo()
  54. {
  55.   bool bResult;
  56.   DWORD dwBytesReturned;
  58.   IsNT = IsWinNT();
  60.   if (IsNT)
  61.   {
  62.     hDriver = CreateFile("\\.\WINIO",
  63.                          GENERIC_READ | GENERIC_WRITE,
  64.                          0,
  65.                          NULL,
  66.                          OPEN_EXISTING,
  67.                          FILE_ATTRIBUTE_NORMAL,
  68.                          NULL);
  70.     // If the driver is not running, install it
  72.     if (hDriver == INVALID_HANDLE_VALUE)
  73.     {
  74.       GetDriverPath();
  76.       bResult = InstallWinIoDriver(szWinIoDriverPath, true);
  78.       if (!bResult)
  79.         return false;
  81.       bResult = StartWinIoDriver();
  83.       if (!bResult)
  84.         return false;
  86.       hDriver = CreateFile("\\.\WINIO",
  87.                            GENERIC_READ | GENERIC_WRITE,
  88.                            0,
  89.                            NULL,
  90.                            OPEN_EXISTING,
  91.                            FILE_ATTRIBUTE_NORMAL,
  92.                            NULL);
  94.       if (hDriver == INVALID_HANDLE_VALUE)
  95.         return false;
  96.     }
  98.     // Enable I/O port access for this process
  100.     if (!DeviceIoControl(hDriver, IOCTL_WINIO_ENABLEDIRECTIO, NULL,
  101.                          0, NULL, 0, &dwBytesReturned, NULL))
  102.       return false;
  104.   }
  105.   else
  106.   {
  107.     VxDCall = (DWORD (WINAPI *)(DWORD,DWORD,DWORD))GetK32ProcAddress(1);
  109.     hDriver = CreateFile("\\.\WINIO.VXD", 0, 0, 0, CREATE_NEW, FILE_FLAG_DELETE_ON_CLOSE, 0);
  111.     if (hDriver == INVALID_HANDLE_VALUE)
  112.       return false;
  113.   }
  115.   IsWinIoInitialized = true;
  117.   return true;
  118. }
  121. void _stdcall ShutdownWinIo()
  122. {
  123.   DWORD dwBytesReturned;
  125.   if (IsNT)
  126.   {
  127.     if (hDriver != INVALID_HANDLE_VALUE)
  128.     {
  129.       // Disable I/O port access
  131.       DeviceIoControl(hDriver, IOCTL_WINIO_DISABLEDIRECTIO, NULL,
  132.                       0, NULL, 0, &dwBytesReturned, NULL);
  134.       CloseHandle(hDriver);
  136.     }
  138.     RemoveWinIoDriver();
  139.   }
  140.   else
  141.     CloseHandle(hDriver);
  143.   IsWinIoInitialized = false;
  144. }