Questions tagged [c++]

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

87 questions with no upvoted or accepted answers
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831 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 ...
4
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0answers
97 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 ...
4
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0answers
1k 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 ...
4
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0answers
624 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-...
4
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1answer
297 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 ...
3
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0answers
218 views

C++ dependency management across projects

We are developing a benchmarking framework in C++, with Make and CMake as build tools. The aim of the framework is to allow others who build algorithms to perform head-to-head comparison against prior ...
3
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0answers
80 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), ...
3
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0answers
84 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 ...
3
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0answers
68 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 ...
3
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0answers
710 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 ...
2
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4answers
272 views

Confused about inheritance and correct usage. Should I avoid using members in base class?

I am using C++ , but as far as I understand most OO principles are cross language. In most of the articles that I have read and liked about inheritance the advice are about : not to use it for the ...
2
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0answers
86 views

Is there an elegant way to handle run-time dependent object composition without using dynamic_cast?

Context I'm attempting to design a modelling framework that is modular and easy to extend and test. (I'm trying to follow open/closed, dependency injection, and composition over inheritence principles)...
2
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0answers
69 views

Integer type for data structure index

I have implemented an append-only tree data structure as a class in C++20. Internally it uses std::vector<Node<T>> where Node<T> contains an int parent_index and T payload. A node ...
2
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0answers
78 views

How to design software driver for the analog to digital converter?

I have been developing software driver for the analog to digital converter in C++. The a/d converter is primary intended for conversion of the temperature signals. The temperature signals are then ...
2
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1answer
112 views

Publisher-Subscriber architecture with central registry

Problem description Publisher-Subscriber architecture with a central registry where agents can either promote their capabilities or search for a given capability. The project must be developed with ...
2
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0answers
144 views

How to separate a serialization code from application in a large c++ project

I'm working on a fairly large c++ project which uses boost's serialization. The issue that I have with the way it is currently organized is that serialization is weaved into the main source code on ...
2
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0answers
118 views

c++ exceptions, should the caller add the context or provide it to the callee?

Here is a piece of code. Basically, I load some source files, all of them are compiled separately, and then I link all of them. LinkedObject loadObject(std::vector<std::string>& fileNames) {...
2
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0answers
124 views

Managing application versions using Conan and RPM

I have a shared object that I developed. This shared object is packaged in two forms, a Conan package, and an RPM. It is a Qt project, so it has a .pro file associated with it. Up until now, we ...
2
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0answers
598 views

multithreading - waiting on a condition without using locks (c++11)

i've been wondering about it for a while now but never found any answers. is it possible to use something like a condition variable without a lock? I have a vector of objects, and a thread pool, and ...
2
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3answers
421 views

Best way to conditionally exclude unused code (C++03)

I'm working on a bare-metal embedded system, with a class that can be compiled for different hardware versions. The class takes in a pointer to a device and uses it, or takes in NULL if the device is ...
2
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0answers
1k 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. ...
2
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0answers
112 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
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0answers
788 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
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0answers
210 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 ...
1
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0answers
105 views

Scalable architecture design for managing data flow in C++ using an Observer design pattern

What I need I need a suitable and scalable solution to manage data flow between the classes in my C++ program. Why I need it Upon new feature requests, I'm continually adding new classes to the ...
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0answers
166 views

How to use polymorphism in embedded software?

I have been developing a control software in C++. From the high perspective the control task can be basically divided into several subtasks calculate unmeasurable physical quantity based on dynamic ...
1
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0answers
100 views

Is using C++ Classes to handle commonly used parameters a misuse of classes?

My team works on an HTTP web server in C++. The codebase has aged over time, and has a widespread problem of 12+ parameters being passed to every function. A fake example: We need to build a Car, but ...
1
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0answers
81 views

How to develop software drivers for the mcu peripherals in C++?

I have been developing a set of software drivers for the peripherals of a MCU. I need to implement those drivers in the C++ programming language. My idea was to model each driver by its own class. ...
1
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0answers
64 views

What is a good design for accumulating temporary data stemming from several processing runs?

I would like to compute cycle times for some manipulator movements. These movements consist of different phases. I have a class that models these phases and this is its constructor to give an idea: /**...
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0answers
57 views

External standalone cpp code in my project

I've inherited a project that has a codebase in src/, but it also has precompiled binaries of dependency software in bin/. I would like to move away from having precompiled software as part of our ...
1
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0answers
53 views

Include a database .h file in the factory or in the class in C++

I have a factory, GuiTable.cpp where I create multiple GUI-related classes. I also have a database class, CommonStrDatabase.h which serves as a database file for different strings used in the GUI. ...
1
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0answers
354 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
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0answers
155 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
1answer
229 views

Processing data in a cluster with multiple tasks

The goal is to provide a scaleable system implementing multiple data processing tasks which can be seen as a graph. Data objects will travel that graph. Most object will visit the same nodes in the ...
1
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2answers
515 views

Hiding raw pointers from public API but need to pass them internally - design review

I am designing and prototyping an ncurses C++ wrapper. It's a hobby project, nothing too serious. I will omit include guards and stdlib includes etc. Consider the following files: application.hpp #...
1
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0answers
58 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
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0answers
303 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
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0answers
52 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
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0answers
169 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
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0answers
391 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
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0answers
358 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
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0answers
122 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
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0answers
93 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
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0answers
152 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
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0answers
77 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
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0answers
103 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
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0answers
2k 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
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0answers
194 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 ...
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0answers
104 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
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0answers
767 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 ...