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Questions tagged [c++]

Questions about C++, a statically typed, free-form, multi-paradigm, compiled, general-purpose programming language.

5
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0answers
539 views

Zeromq bidirectional asynchronous transmission?

I have a system which consists of two applications. Currently, two applications communicate using multiple zeromq publish/subscribe sockets generated for each specific type of transmission. Sockets ...
3
votes
0answers
236 views

Requesting information regarding the use of MUI vs. the use of GetText for i18n/L10n of Windows desktop applications

I have spent the past two days investigating which technology I will use to support translations of text strings (as part of an overall internationalization migration) for an archaic (VC6) Windows ...
2
votes
0answers
72 views

Dynamically load user code from a common library

My project aims to provide a common interface between multiple different HDL simulators, so users can write test benches that will work no matter the simulator used. In this situation, it is the ...
2
votes
0answers
76 views

Creating bindable input handler in C++ spanning two separate modules

I have a wxWidgets application. This is the first, main module. The second module is an openGL engine. It's a model-view-(controller) structure, where application is the view (and the controller), ...
2
votes
0answers
2k views

How to improve a pattern 'enum class with methods'

Over many years, I always find myself reconsidering this design, so I wanted to get some feedback on my solution to it. Problem: I need a limited amount of objects = instances from a class, and I ...
2
votes
0answers
90 views

Access modifiers in combination of interpreter pattern with template method pattern

Motivation: (Skip to "The Problem" if you don't need motivation for it) As a project for myself, I'm writing an expression parser for certain kinds of mathematical expressions, and I'm using the ...
2
votes
0answers
466 views

How to organize project code with googletest?

Generally, we like to have a common folder for common header files to be shared among various projects in solution but what about googletest since it needs access to all header files of project to ...
2
votes
0answers
595 views

Python and C++ repository structure

I'm refactoring the directory structure of a large Python repo that has a few dozen C and C++ files littered throughout. Is there a suggested architecture for a Python package that contains C/C++ code ...
2
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0answers
157 views

Design Pattern for Internal Builder

There is an object which is very complicated to build and many algorithms needed to figure out how it should be created (for your curiosity it is an object that represents and draws the beaming of ...
2
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0answers
341 views

What are the benefits of an input/output component design?

For the company I work at, all of our projects, including a new one started last year, are written in C89. We write for vxWorks (a real time embedded operation system). Our software runs multi-...
2
votes
0answers
76 views

How to architect rule matching with multiple conditionals and outcomes

I'm working on allowing my users to create their own ruleset for data that's coming in. All of the data below is sample mock data and not in relation to our product. Example of a rule (there can be ...
2
votes
0answers
63 views

Visual interpolations: independent or linked to object?

I have a class that I use to render GUI elements on the screen, this class has a tree structure (with children, parent, and siblings). I created an additional class which allows me to interpolate some ...
2
votes
0answers
204 views

What is the “async desaster” Detlef Vollmann was talking about at Meeting C++ 2014?

I found the slides of his talk there: https://meetingcpp.com/tl_files/2014/talks/executors-meetingcpp.pdf In one of the last pages, he is talking about the "async desaster" (which I, as a non-native ...
2
votes
0answers
622 views

Best software architecture for an efficient network tunneling in C++

Before jumping to my questions, let me explain my project's background. I am part of a team that organize the network of a famous LAN event. Most of the games nowadays actually don't run locally but ...
1
vote
0answers
104 views

Designing a multithreaded TCP/UDP server for audio sharing

As briefly introduced in the question title, I am trying to design and implement a server application able to let clients share audio contents between themselves. In order to achieve that, I decided ...
1
vote
0answers
64 views

Unit testing C++ in XCode

I'm working on a plugin for some drafting software. The plugin takes the form of a dynamically loaded mach-o bundle. The software vendor provides a template plugin in the form of an XCode project. ...
1
vote
0answers
15 views

Save data from multiple Qt components scattered around multiple QML files

I would like to save the current "value" property of several components (e.g. a Slider) as a configuration profile when the user clicks on the Save button in my application. However, the Save button ...
1
vote
0answers
27 views

Applying an overloaded/templated function depending on the type of a QVariant

I'm trying to take a QVariant (in this case from a QProperty generated on a class) and based on the type, return a QWidget that allows for it to be edited appropriately. a signature for the ...
1
vote
0answers
293 views

Inter-system communication design on Windows (C++)

I was wanting to create a program consisting of 3 elements: A central component with no UI which will work on HTTP traffic and trigger one or more “worker” elements as needed A monitor component ...
1
vote
0answers
50 views

How should I set up the listener service for a dynamic user interface?

So I'm working on a project and I'm running into conceptual problems in creating my user interface. It's for a DirectX11 multi-monitor game I'm writing. I've got a prototype working, with entity ...
1
vote
0answers
160 views

Is the readability of file list in IDE a reason to keep empty .cpp file?

Sometimes I just need .h but not .cpp file, eg : interface class or enum class, and when the class list is displayed on file list of IDE (eg:Xcode): Animal.cpp Animal.h Cat.cpp Cat.h Dog.cpp Dog.h ...
1
vote
0answers
152 views

Server design: How should the server communicate with the rest of the program?

I've been trying to learn how to handle network input in C++ (using asio for networking). Right now I'm trying to build a program which should be able to receive commands and data from a client ...
1
vote
0answers
282 views

Low latency, multi-client producer/consumer. C++ on Linux

I am looking to replace a framework from the ground up. It works as it is, but I've been tasked with understanding it, so I want to know if anyone else recognizes any glaring design issues that I ...
1
vote
0answers
214 views

Dependency injection in the template class

I have a template wrapper class around the container std::priority_queue that supports multithreading. The short version of it is below. In this class I employ the function IsReady() that checks ...
1
vote
0answers
103 views

Alternative to reorder c++ tokens

Our organization is looking to standardize the way we use const T& and T const& and while we initially looked at clang-format to solve the job, it doesn't reorder tokens so there is no way to ...
1
vote
0answers
91 views

Receiving events through an interface

So I'm writing a game and using the Google Play Services framework to send and receive data. I have to implement the IRealTimeEventListener interface and override the functions below to receive ...
1
vote
0answers
136 views

Design: Mixing-in different functionality into class hierarchy in C++

Assume I have a sort of Observer-Pattern, where message objects are sent to observers. So I have say class Message as the top of a hierarchy and observers working on them. Concrete messages are ...
1
vote
0answers
74 views

Pointers on porting a c++ workflow domain specific language to javascript

I am writing a game in c++ with the v8 javascript engine embedded in it. I have a c++ workflow system I use to tell things how to do specific things. It's nice and I like it, but I need it to work ...
1
vote
0answers
100 views

How to structure enum data to achieve the desired effect

I'm making a framework for building simple html websites for an embedded system and I want to make it bulletproof in a way that a user can't make mistakes in building the html document. As I've ...
1
vote
0answers
1k views

Speed: Named Shared Memory vs Memory Mapped File vs Normal Memory

Let's say I have a server, where clients who connect are constantly updating their inventory. I could simply save the changes in to the database after an item has been updated, or I could update the ...
1
vote
0answers
191 views

Switching from Node.js class techniques to C++

I'm going to be rewriting a project from Node.js into C++11. The device the Node.js scripts are being run on are ARM based, and Node.js is slow to start up on the device. In the Node.js program, I ...
1
vote
0answers
158 views

Pointers vs IDs for “context-specific” functions

I need to be able to load, use, and free resources from a single monolithic object. I have two requirements: 1. That the resource loaded is owned by the object that created it and 2. All objects in a "...
1
vote
0answers
102 views

Maximizing reuse out of a function primitive in CUDA

I'm working on the implementation of a few related algorithms in CUDA, all of which require a primitive that we'll call f(). The related algorithms can't simply call f though, as they require f to ...
1
vote
0answers
680 views

In-place merging of sorted intervals in an array?

So I have code producing k sorted intervals in an n-sized array. What I'm brainstorming is the possibility of in-place merge of these intervals into a single sorted interval/array. The problem is ...
1
vote
0answers
164 views

Web Services of System Integration

I have been assigned to a system integration project. However, I do not understand part of the integration implementation architecture. For example, I have a passport scanner connected to a Windows ...
1
vote
0answers
240 views

why c++11 define closure as a process of capturing variables

when using closure in other languages, it just feels nature, variables from outer scope are captured automatically , without the need of declaring such captures. in c++11, good to see we have ...
0
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0answers
80 views

Base class with bool flag to imitate virtual constructor

I am using bool flag to call base class function when needed to imitate virtual constructor. I am using this way for inheritance purpose. I have a Base class constructor with int and bool. The bool ...
0
votes
0answers
50 views

Linear “steps” of operations considered a state machine?

I have a set of tasks I perform to complete some larger operation. These tasks must be executed in linear order, and you cannot proceed onto the next task until the previous completes. For the most ...
0
votes
0answers
95 views

How can I gracefully handle this addition of animation?

I have the following setup in a GUI library I'm making (for fun). Ignore the colors and positions being integers, it's just to serve the purpose of illustration. // Example program #include <...
0
votes
0answers
125 views

c++ templates - combining deduction with default template arguments

I have a simple class (details here) namespace MemoizerSupport { template <typename T1, typename T2> using DEFAULT_CACHE = LRUCache<T1, T2>; } template <typename RESULT, ...
0
votes
0answers
115 views

A program, written in native code, needs to access data, read by a managed DLL

I'm working on an application, which needs to base itself on a DLL, written in managed code (C#), in order to function. That DLL contains type definitions. Therefore a convertor has been written, ...
0
votes
0answers
36 views

Model-View in Qt app with device access

I'm building a monitoring system that, well, monitors a series of devices, periodically requesting various kinds of information to each device, such as current status, networking information and the ...
0
votes
0answers
90 views

How to translate from managed to native class definitions

I have an input file, being the DLL of a C# piece of code, containing managed class definitions. I also have a *.json file, who determines how the conversion should be done. As an example, this is ...
0
votes
0answers
75 views

Redirecting the debugger back to user code when stepping through engine code in C++

I have a project (C++, Visual Studio 2015) where I'm thinking of making the API for a library take lambdas or function objects so that the user has a place to put debug breakpoints to know what higher ...
0
votes
0answers
205 views

How to make a proper argument manager for CLI Software?

I thinked about an ArgumentManager class working like this: A constructor with argc & argv(or std::vector) as parameter. getCount() => Returns argc. getArgLit(argLit) => Return true if the ...
0
votes
0answers
275 views

more than one google test executable?

I have a big legacy C++ project need to implement unit testing with google test framework. I have managed to mock a module B which is a A depends on. So successfully write a unit test. But my ...
0
votes
0answers
346 views

What is the proper way to delete a QProcess Pointer?

Backstory: I usually avoid Pointers like the plague, and so I am very inexperienced using them. I am currently threading a class, and it is complaining when I have a QProcess on the stack because ...
0
votes
0answers
212 views

What are the flaws in this method of session handling in a TCP/SSL Application?

First of all a little bit of background information that may assist you when approaching an answer for this question. I am developing a database application using Vb. Net as the client side ...
0
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0answers
98 views

Qt Naming Schemes for returns of boolean member variables: enabled(); vs isEnabled(); ?

In building my classes, I have noticed that I have not been very consistent about naming my boolean returns. In Qt; I notice that many of their classes use the is prefix, but checking their coding ...
0
votes
0answers
102 views

Should frequent Fonts, Colors, Pens etc be “Cached”

I am creating a game, currently everything redraws every 50ms, and that involves quite a few Gdi Objects. Here: Gdiplus::Pen outlineScrollPen ( Color (200, 0, 0, 0), 4 ); ...