Chapter 3

Threading and the Asynchronous Pattern

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Pre-requirement for codes compilation:

1. Windows XP Pro SP2.

2. Visual Studio Community (previously Express) Edition – free.

3. Visual Studio Component Community (previously Express) Edition – VB .NET, C#, VC++ etc. - free.

4. .NET Framework 3.5.

5. Some of the program examples in this chapter are Windows Form/WinForm applications in C++/CLI, C# and VB .NET.

6. Before you start this Chapter, you may want to learn and understand the Win32 Thread, Process and Synchronization that implemented on the Windows platform.

7. The general Visual C++ .NET/C++-CLI programming tutorial which includes WinForm can be found at Visual C++ .NET programming tutorial.

What do we have in this chapter?

1. An Overview

Threading

Creating a Thread

C++ Thread Program Example

C# Thread Program Example

VB .NET Thread Program Example

2. Controlling a Thread

Abort()

Suspend(), Interrupt(), and Resume()

Finishing a Thread

Windows Forms I/O Problem Using Threading

C++ WinForm Program Example

3. C# WinForm Program Example

4. VB .NET WinForm Program Example

5. Using Thread Pools

Using Events to Synchronize Threads

Designing Critical Sections in Your Code

Monitor

Interlocked

C++ Critical Section Program Example

6. C# Critical Section Program Example

VB .NET Critical Section Program Example

7. Asynchronous Pattern

C++ Asynchronous I/O Program Example

8. C# Asynchronous I/O Program Example

9. VB .NET Asynchronous I/O Program Example

C++ Thread and Network I/O Program Example

10. C# Thread and Network I/O Program Example

VB .NET Thread and Network I/O Program Example

Summary

This chapter will introduce two important concepts useful in network programming: threading and the asynchronous pattern. These asynchronous programming techniques allow you to design more flexible applications so that you can do multiple things at the same time in one application. This flexibility is important because you can develop a networking application that can service a user interface while it processes I/O on a network, which makes the user experience much better. Many of the remaining chapter discussions and samples will use these asynchronous programming techniques.

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