By John Torjo
Increase your abilities with functional examples for C++ community programming
Overview
• increase your C++ community programming utilizing Boost.Asio
• detect how Boost.Asio handles synchronous and asynchronous programming models.
• sensible examples of client/server applications.
• the best way to care for threading whilst writing community applications.
• Harness the ability of advance with lots of examples that you should construct upon.
In Detail
Network programming isn't new and it's no mystery that it's now not a simple activity. Boost.Asio offers a superb point of abstraction, to ensure that with a minimum volume of coding you could create appealing client/server purposes, and feature enjoyable within the process!.
"Boost.Asio C++ community Programming" indicates the best way to construct client/server functions utilizing a library that's a part of the preferred peer-reviewed strengthen C++ Libraries. It analyzes even if you have to cross synchronous or asynchronous and the position that threading performs, while delivering examples you could run and expand for yourself.
After overlaying the basics of Boost.Asio you'll become aware of how one can construct synchronous and asynchronous consumers and servers. additionally, you will see how one can have your individual asynchronous capabilities play great with Boost.Asio. As an advantage, we'll introduce co-routines, which make asynchronous programming a bit of cake. these days, community programming is a needs to, it doesn't matter what kind of programmer you're. "Boost.Asio C++ community Programming" exhibits simply how easy networking might be, if you’re utilizing definitely the right tools.
What you are going to study from this book
• how you can simply reference Boost.Asio programming.
• Synchronous as opposed to asynchronous utilizing Boost.Asio.
• How threading impacts programming utilizing Boost.Asio.
• Create your personal echo shopper and server.
• extra examples of client/server functions, either synchronous and asynchronous.
• enforce your personal asynchronous operations.
• Co-routines: asynchronous operations with a synchronous feel.
• Use Boost.Asio for SSL Networking.
• Debug Boost.Asio.
• Use Boost.Asio for greater than simply networking.
Approach
What you will want is a straightforward point of abstraction, that is simply what this e-book offers along side Boost.Asio. Switching to Boost.Asio is simply a couple of additional #include directives away, with assistance from this functional and fascinating guide.
Who this e-book is written for
This ebook is superb for builders that have to do community programming, who don't are looking to delve into the complex problems with a uncooked networking API. you need to be acquainted with center advance suggestions, resembling clever tips and shared_from_this, source periods (noncopyable), functors and boost::bind, improve mutexes, and the enhance date/time library. Readers must also be conversant in "blocking" as opposed to "non-blocking" operations.
Read Online or Download Boost.Asio C++ Network Programming PDF
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Additional info for Boost.Asio C++ Network Programming
Sample text
Asio Fundamentals This is not so straightforward for asynchronous operations, as given in the following code snippet: // very bad code ... void on_read(const boost::system::error_code & err, std::size_t read_ bytes) { ... async_receive(buffer(buff), on_read); } After the call to async_receive(), buff will go out of scope, thus its memory will be deallocated. When we're about to actually receive some data on the socket, we'll copy them into memory we don't own anymore; it could either be deallocated, or reallocated by some other code for some other data, thus, corrupting memory.
You can optionally specify a completion function. Asio if the async_read operation is complete (if not, it will continue to read). Its signature is size_t completion(const boost::system::error_code& err, size_t bytes_transfered). When this completion function returns 0, we consider the read operation complete; if it returns a non-zero value, it indicates the maximum number of bytes to be read on the next call to the stream's async_read_some operation. An example will follow to clear up this. • async_write(stream, buffer [, completion], handler): This function asynchronously writes to a stream.
However, most of the time you will only use io_service::strand::wrap() function as argument to io_service::poll() or io_service::dispatch(). Staying alive Say, you do the following operation: io_service service; ip::tcp::socket sock(service); char buff[512]; ... read(sock, buffer(buff)); In this case, sock and buff must both outlive the call to read(). In other words, they must be valid after the call to read() returns. This is just what you'd expect; all arguments you pass to a function should be valid inside the function.