Thread Pooling

Introduction

"Many applications create threads that spend a great deal of time in the sleeping state,
waiting for an event to occur. Other threads might enter a sleeping state only to be awakened
periodically to poll for a change or update status information. Thread pooling enables you to use threads more efficiently by providing your application
with a pool of worker threads that are managed by the system. One thread monitors
the status of several wait operations queued to the thread pool. When a wait operation completes,
a worker thread from the thread pool executes the corresponding callback function." (MSDN 2003).

Requirements

1. /MT flag is required.
2. MFC.

Explanation

The project is well documented and it contains a simple demonstration.
The demonstration displays a pool of two threads and fifteen jobs. You can think of it
as fifteen connections if it was a socket server.

In the demo, one thread is stuck for a period of time while the work is not stopped, the other
thread keeps on doing the jobs.

Call initialize in order to start the thread pool.

You must declare a callback function which will handle jobs of all threads. It should be like this:

bool ThreadCallback(LONG jobId, LPVOID pParam)

The jobId is an inside counting but you'll need it to remove jobs with the following function:

RemoveJob( LONG jobID )