private void OpenFile(string fileName)
{
if (!File.Exists(fileName))
{
throw new FileNotFoundException();
}
IntPtr fileHandle = UnManageAPI.CreateFile(fileName, UnManageAPI.GENERIC_READ | UnManageAPI.GENERIC_WRITE, FileShare.Read | FileShare.Write, IntPtr.Zero, FileMode.Open, UnManageAPI.FILE_ATTRIBUTE_NORMAL | UnManageAPI.FILE_FLAG_SEQUENTIAL_SCAN, IntPtr.Zero);
if (UnManageAPI.INVALID_HANDLE_VALUE == (int)fileHandle)
{
throw new FileLoadException("文件打开出错");
}
uint fileSizeHigh = 0;
//读取文件大小
long fileSize = UnManageAPI.GetFileSize(fileHandle, out fileSizeHigh);
IntPtr mappingFileHandle = UnManageAPI.CreateFileMapping(fileHandle, IntPtr.Zero, UnManageAPI.PAGE_READWRITE, 0, 0, "KugarMapping");
if (mappingFileHandle == IntPtr.Zero)
{
throw new FileLoadException("文件映射出错");
}
fileSize |= (((uint)fileSizeHigh) << 32);
UnManageAPI.CloseHandle(fileHandle);
targetMappingFileHandle = mappingFileHandle;
fileLength = fileSize;
}
protected void Disposed(bool disposing)
{
if (_isDispose)
{
return;
}
if (disposing)
{
UnManageAPI.CloseHandle(targetMappingFileHandle);
_isDispose = true;
}
}