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 Be sure that knowledge from this book won’t get outdated, as more and more Boost libraries become part of the C++ Standard.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

Making a nonblocking barrier


In multithreaded programming, there is an abstraction called barrier. It stops threads of execution that reach it until the requested number of threads are not blocked on it. After that, all the threads are released and they continue with their execution. Consider the following example of where it can be used.

We want to process different parts of data in different threads and then send the data:

#include <boost/array.hpp>
#include <boost/thread/barrier.hpp>
#include <boost/thread/thread.hpp>

typedef boost::array<std::size_t, 10000> vector_type;
typedef boost::array<vector_type, 4> data_t;

void fill_data(vector_type& data);
void compute_send_data(data_t& data);

void runner(std::size_t thread_index, boost::barrier& barrier, data_t& data) {
    for (std::size_t i = 0; i < 1000; ++ i) {
        fill_data(data.at(thread_index));
        barrier.wait();

        if (!thread_index) {
            compute_send_data(data...