Book Image

Boost C++ Application Development Cookbook - Second Edition

By : Anton Polukhin Alekseevic
Book Image

Boost C++ Application Development Cookbook - Second Edition

By: Anton Polukhin Alekseevic

Overview of this book

If you want to take advantage of the real power of Boost and C++ and avoid the confusion about which library to use in which situation, then this book is for you. Beginning with the basics of Boost C++, you will move on to learn how the Boost libraries simplify application development. You will learn to convert data such as string to numbers, numbers to string, numbers to numbers and more. Managing resources will become a piece of cake. You’ll see what kind of work can be done at compile time and what Boost containers can do. You will learn everything for the development of high quality fast and portable applications. Write a program once and then you can use it on Linux, Windows, MacOS, Android operating systems. From manipulating images to graphs, directories, timers, files, networking – everyone will find an interesting topic. Be sure that knowledge from this book won’t get outdated, as more and more Boost libraries become part of the C++ Standard.
Table of Contents (19 chapters)
Title Page
Credits
About the Author
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface

Manipulating a group of threads


Those readers who were trying to repeat all the examples by themselves, or those who were experimenting with threads must already be bored with writing the following code to launch and join threads:

#include <boost/thread.hpp>

void some_function();

void sample() {
    boost::thread t1(&some_function);
    boost::thread t2(&some_function);
    boost::thread t3(&some_function);

    // ... 

    t1.join();
    t2.join();
    t3.join();
} 

Maybe there is a better way to do this?

Getting ready

Basic knowledge of threads will be more than enough for this recipe.

How to do it...

We may manipulate a group of threads using the boost::thread_group class.

  1. Construct a boost::thread_group variable:
#include <boost/thread.hpp>

int main() {
    boost::thread_group threads;
  1. Create threads into the preceding variable:
    // Launching 10 threads.
    for (unsigned i = 0; i < 10; ++i) {
        threads.create_thread(&some_function);
    }
  1. Now, you may...