Creating Threads

SourcePro Core : Threads Module User's Guide : PART II Concurrency Packages : The Threading Package : Using Threads : Creating Threads

Creating Threads

Example 1 creates a second thread of execution (main() is the first thread) and uses that thread to call a global function that prints the message “Hello World!” to the console.

Example 1 – Creating threads

#include <rw/thread/RWThreadFunction.h>

#include <iostream> // 1

using namespace std;

void hello(void) // 2

{

cout << "Hello World!” << endl;

}

int main()

{

RWThreadFunction myThread = RWThreadFunction::make(hello); // 3

myThread.start(); // 4

myThread.join(); // 5

return 0;

}

//1 Includes the header file containing the RWThreadFunction class declaration used in the example.

//2 Defines a global function to produce the message.

//3 Uses a Threading package global function to construct an RWThreadFunction runnable that executes the hello() function when started. That runnable object is bound to a local handle named myThread.

//4 Starts the runnable. This results in the creation of a new thread that then executes the hello() function.

//5 Waits for the newly created thread to finish execution.

The following sections take a closer look at some of the key components of this example.