private static extern Boolean GetVersionEx_Val_NonBlit(ref OSVersionInfoEx_Val_NonBlit versionInfo);
public void PerfTest(Int32 testIterations) { Console.WriteLine("Test Iteration for each type: {0}", testIterations); // 1. Non-blittable reference type // 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_Ref_NonBlit info_ref_nonblit = new OSVersionInfoEx_Ref_NonBlit(); for (Int32 index = 0; index < testIterations; index++) { // We will not user wrapper method so that we can test on pure performance // WrapperGetVersionEx_Ref_NonBlit(info_ref_nonblit); GetVersionEx_Ref_NonBlit(info_ref_nonblit); } // End time TimeSpan span = DateTime.Now - start; // Output results Console.WriteLine("Non-blittable reference type marshalling took: \t{0} secs", span.TotalSeconds); // 2. Blittalbe reference type // Start with a fresh managed heap GC.Collect(); GC.WaitForPendingFinalizers(); GC.Collect(); // Start time start = DateTime.Now; // Create the marshalled instance and perform calls OSVersionInfoEx_Ref_Blit info_ref_blit = new OSVersionInfoEx_Ref_Blit(); for (Int32 index = 0; index < testIterations; index++) { // We will not user wrapper method so that we can test on pure performance // WrapperGetVersionEx_Ref_Blit(info_ref_blit); GetVersionEx_Ref_Blit(info_ref_blit); } // End time span = DateTime.Now - start; // Output results Console.WriteLine("Blittable reference type marshalling took: \t{0} secs", span.TotalSeconds); // 3. Non-blittalbe value type // Start with a fresh managed heap GC.Collect(); GC.WaitForPendingFinalizers(); GC.Collect(); // Start time start = DateTime.Now; // Create the marshalled instance and perform calls OSVersionInfoEx_Val_NonBlit info_val_nonblit = new OSVersionInfoEx_Val_NonBlit(); // If we use the wrapper method, the next statement is not necessary, since the wrapper method will do the stuff. info_val_nonblit.OSVersionInfoSize = (UInt32)Marshal.SizeOf(typeof(OSVersionInfoEx_Val_NonBlit)); for (Int32 index = 0; index < testIterations; index++) { // We will not user wrapper method so that we can test on pure performance // WrapperGetVersionEx_Val_NonBlit(out info_val_nonblit); GetVersionEx_Val_NonBlit(ref info_val_nonblit); } // End time span = DateTime.Now - start; // Output results Console.WriteLine("Non-blittable value type marshalling took : \t{0} secs", span.TotalSeconds); // 4. Blittalbe value type // Start with a fresh managed heap GC.Collect(); GC.WaitForPendingFinalizers(); GC.Collect(); // Start time start = DateTime.Now; // Create the marshalled instance and perform calls OSVersionInfoEx_Val_Blit info_val_blit = new OSVersionInfoEx_Val_Blit(); // If we use the wrapper method, the next statement is not necessary, since the wrapper method will do the stuff. info_val_blit.OSVersionInfoSize = (UInt32)Marshal.SizeOf(typeof(OSVersionInfoEx_Val_Blit)); for (Int32 index = 0; index < testIterations; index++) { // We will not user wrapper method so that we can test on pure performance // WrapperGetVersionEx_Val_Blit(out info_val_blit); GetVersionEx_Val_Blit(ref info_val_blit); } // End time span = DateTime.Now - start; // Output results Console.WriteLine("Blittable value 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_val_blit.OSVersionInfoSize); Console.WriteLine("MajorVersion: \t\t{0}", info_val_blit.MajorVersion); Console.WriteLine("MinorVersion: \t\t{0}", info_val_blit.MinorVersion); Console.WriteLine("BuildNumber: \t\t{0}", info_val_blit.BuildNumber); Console.WriteLine("PlatformId: \t\t{0}", info_val_blit.PlatformId); Console.WriteLine("CSDVersion: \t\t{0}", info_val_blit.CSDVersion); Console.WriteLine("ServicePackMajor: \t{0}", info_val_blit.ServicePackMajor); Console.WriteLine("ServicePackMinor: \t{0}", info_val_blit.ServicePackMinor); Console.WriteLine("SuiteMask: \t\t{0}", info_val_blit.SuiteMask); Console.WriteLine("ProductType: \t\t{0}", info_val_blit.ProductType); Console.WriteLine("Reserved: \t\t{0}", info_val_blit.Reserved); Console.WriteLine(); }
/// <summary> /// ���Ƕ�Win32 API����GetVersionEx���з�װ��İ�װ���� /// </summary> /// <param name="type"></param> public void WrapperGetVersionEx_Val_NonBlit(out OSVersionInfoEx_Val_NonBlit versionInfo) { versionInfo = new OSVersionInfoEx_Val_NonBlit(); versionInfo.OSVersionInfoSize = (UInt32)Marshal.SizeOf(typeof(OSVersionInfoEx_Val_NonBlit)); if (!GetVersionEx_Val_NonBlit(ref versionInfo)) { // ���ʧ�ܣ�������Ĵ����룬���׳���Ӧ��Win32�쳣 Int32 err = Marshal.GetLastWin32Error(); throw new Win32Exception(err); } }