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Ask Slashdot: Is C++ the Right Tool For This Project?
ranton writes: I am about to start a personal project which I believe should be done in C/C++. The main reasons I have for this are the needs to manage memory usage and disk access at a very granular level and a desire to be cross-platform. Performance is also important but I am unlikely to spend enough time optimizing to be much faster than core libraries of higher level languages.
On the other hand, network access is also a critical part of the project and I am worried about the effort it takes to make cross platform code for both network and disk access. I have been working in the Java / C# world for the past decade and things like TCP/IP and SSL have just been done for me by core libraries. Do libraries like Boost or Asio do a good job of abstracting these aspects away? Or are there other options for doing granular memory and disk management with more high level languages that have better cross-platform library support? I am willing to brush up on my C/C++ skills if necessary but want to spend as much time as possible developing the unique and potentially innovative parts of my project. Thanks for any advice you can provide.
On the other hand, network access is also a critical part of the project and I am worried about the effort it takes to make cross platform code for both network and disk access. I have been working in the Java / C# world for the past decade and things like TCP/IP and SSL have just been done for me by core libraries. Do libraries like Boost or Asio do a good job of abstracting these aspects away? Or are there other options for doing granular memory and disk management with more high level languages that have better cross-platform library support? I am willing to brush up on my C/C++ skills if necessary but want to spend as much time as possible developing the unique and potentially innovative parts of my project. Thanks for any advice you can provide.
I would recommend using Qt for a cross platform framework. I haven't tried every C++ framework, but of the ones I have tried, Qt is by far the best.
You haven't provided nearly enough information to make a decision here. You haven't defined what you mean by "granular level", whether you need a UI, what functionality you have to provide.
Decide whether your project is to be done in C or C++. Choose one and embrace it.
There's an illusion that because these two languages share a common origin that they're somehow the same, bundled together as "C/C++". Especially since C code can often be valid in a C++ compiler.
In reality, the good programming styles in each of these two languages differ substantially. Start wedging bits of C code inside a C++ program and you'll soon find yourself fighting the language and core libraries. Likewise, the conventions for core concepts like objects and linked lists in C are somewhat different to C++ and with their own strengths. Both are powerful languages for large projects, but not the same language.
You said nothing useful about your project
C++ could be a good choice for all the things you've mentioned. Networking is not an issue, as there are many open source libraries (e.g. libcurl - http://curl.haxx.se/), and using Boost is often a good thing anyway. Also, there are at least two good memory allocators: tmalloc (http://goog-perftools.sourceforge.net/doc/tcmalloc.html) and jemalloc (http://www.canonware.com/jemalloc/) so you may not need to write your own. (I assume that the above open source licenses are good for you, but they are just examples...)
However... I doubt that your project will be only Network + Memory + Disk. What else do you need? Some UI? Should it interact with the Web? Or with services in the Cloud? There's no easy answer to your question without knowing what else you need, and I wouldn't even exclude a hybrid-language approach (e.g. C++ / Python / JavaScript*).
* Before someone starts ranting about JavaScript having to run in a browser: NO - JavaScript runs perfectly fine withouth a browser, and can easily interact with C++. Have a look at V8 or SpiderMonkey, just to name some JavaScript engines.
you want everything -- memory, disk, network, speed -- and c++ will give you all of that just fine. And it'll give you the giant learning curve, and force you to take every hard road from start to finish.
Have you considered using perl -- which is pretty well cross-platform -- and writing the few granular components in c++, bootstrapped into perl?
That's pretty standard for i-want-to-use-perl-but-i-need-this-part-to-be-faster.
It is possible to use C++ with Java. Try to look at Java Native Interface (JNI). It comes with a performance penalty on each call across the interface, but if you are using it for networking, the penalty will be negligible.
If you are working on Windows, it is possible to do the same with C# using a CLI interface wrapper. I have no idea if that trick works on Linux/Mac.
The truth may be out there, but lies are inside your head
I love C++. It will take you a a couple of years to get good at it, but as you say - it's a personal project, and I am guessing you've had enough of Java.
However, if you are doing any sort of front end GUI for it, then don't go there. Stay with Java. There is no unified FE GUI for C++ which I could recommend.
Likewise, many of the suggestions above seem to have not read that you already know Java.
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That's because you have no clue. The problems of high-performance, incremental garbage collection was already solved in the 80s and it is ridiculous that there are still ignorants like you around who think that reference counting and incongruent OOP design patterns could replace GC.
It has only been solved in theory, not in practice. In practice garbage collection is still garbage if you need high performance, usually because high performance usually implies low memory usage and consistent high performance.
The C++11 specification was explicitly written to permit garbage collection and includes standard library functions for providing hints to a garbage collector.
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