public void ExplicitLayoutTest(Int32 testIterations)
{
Console.WriteLine("Test Iteration for each type: {0}", testIterations);
// Blittable reference type with explicit struct layout
// Start with a fresh managed heap
GC.Collect();
GC.WaitForPendingFinalizers();
GC.Collect();
// Start time
DateTime start = DateTime.Now;
// Create the marshalled instance and perform calls
OSVersionInfoEx_Layout_Explicit info_explicit_layout = new OSVersionInfoEx_Layout_Explicit();
for (Int32 index = 0; index < testIterations; index++)
{
// We will not user wrapper method so that we can test on pure performance
// WrapperGetVersionEx_Layout_Explicit(out info_explicit_layout);
GetVersionEx_Layout_Explicit(info_explicit_layout);
}
// End time
TimeSpan span = DateTime.Now - start;
// Output results
Console.WriteLine("Explicit layout blittable type marshalling took : \t{0} secs", span.TotalSeconds);
// Dump version info
Console.WriteLine("{0}Current system version information:", Environment.NewLine);
Console.WriteLine("OSVersionInfoSize: \t{0}", info_explicit_layout.OSVersionInfoSize);
Console.WriteLine("MajorVersion: \t\t{0}", info_explicit_layout.MajorVersion);
Console.WriteLine("MinorVersion: \t\t{0}", info_explicit_layout.MinorVersion);
Console.WriteLine("BuildNumber: \t\t{0}", info_explicit_layout.BuildNumber);
Console.WriteLine("PlatformId: \t\t{0}", info_explicit_layout.PlatformId);
Console.WriteLine("ServicePackMajor: \t{0}", info_explicit_layout.ServicePackMajor);
Console.WriteLine("ServicePackMinor: \t{0}", info_explicit_layout.ServicePackMinor);
Console.WriteLine("SuiteMask: \t\t{0}", info_explicit_layout.SuiteMask);
Console.WriteLine("ProductType: \t\t{0}", info_explicit_layout.ProductType);
Console.WriteLine("Reserved: \t\t{0}", info_explicit_layout.Reserved);
Console.WriteLine();
}
private static extern Boolean GetVersionEx_Layout_Explicit(OSVersionInfoEx_Layout_Explicit versionInfor);
/// <summary>
/// ���Ƕ�Win32 API����GetVersionEx���з�װ��İ�װ����
/// </summary>
/// <param name="type"></param>
public void WrapperGetVersionEx_Layout_Explicit(OSVersionInfoEx_Layout_Explicit versionInfo)
{
if (!GetVersionEx_Layout_Explicit(versionInfo))
{
// ���ʧ�ܣ�������Ĵ����룬���׳���Ӧ��Win32�쳣
Int32 err = Marshal.GetLastWin32Error();
throw new Win32Exception(err);
}
}