mov-store + mfence and xchg are both valid ways to implement a sequential-consistency store on x86. The implicit lock prefix on an xchg with memory makes it a full memory barrier, like all atomic RMW operations on x86. (x86’s memory-ordering rules essentially make that full-barrier effect the only option for any atomic RMW: it’s both … Read more
You should only use extern template to force the compiler to not instantiate a template when you know that it will be instantiated somewhere else. It is used to reduce compile time and object file size. For example: // header.h template<typename T> void ReallyBigFunction() { // Body } // source1.cpp #include “header.h” void something1() { … Read more
1. “What is it?” While std::move() is technically a function – I would say it isn’t really a function. It’s sort of a converter between ways the compiler considers an expression’s value. 2. “What does it do?” The first thing to note is that std::move() doesn’t actually move anything. It changes an expression from being … Read more
You could use, when the condition, std::cin.fail() happens: std::cin.clear(); std::cin.ignore(); And then continue with the loop, with a continue; statement. std::cin.clear() clears the error flags, and sets new ones, and std::cin.ignore() effectively ignores them (by extracting and discarding them). Sources: cin.ignore() cin.clear()
He who is Shy* gave you the germ of an answer, but only the germ. The basic technique for converting a value into a string in the C pre-processor is indeed via the ‘#’ operator, but a simple transliteration of the proposed solution gets a compilation error: #define TEST_FUNC test_func #define TEST_FUNC_NAME #TEST_FUNC #include <stdio.h> … Read more
Here’s a straight forward implementation of the md5sum command that computes and displays the MD5 of the file specified on the command-line. It needs to be linked against the OpenSSL library (gcc md5.c -o md5 -lssl) to work. It’s pure C, but you should be able to adapt it to your C++ application easily enough. … Read more
I was able to fix it by running “C:\Program Files\dotnet\dotnet.exe” “C:\fullpath\PROJECT.dll” on the command prompt, which gave me a much more meaningful error: “The specified framework ‘Microsoft.NETCore.App’, version ‘1.0.1’ was not found. – Check application dependencies and target a framework version installed at: C:\Program Files\dotnet\shared\Microsoft.NETCore.App – The following versions are installed: 1.0.0 – Alternatively, install … Read more
Add a reference to Microsoft.VisualBasic, InputBox is in the Microsoft.VisualBasic.Interaction namespace: using Microsoft.VisualBasic; string input = Interaction.InputBox(“Prompt”, “Title”, “Default”, x_coordinate, y_coordinate); Only the first argument for prompt is mandatory
Pass any information you want to in to the constructor of Settings form, and provide accessor methods for things you need out of there. public class SettingsForm : WinForm { private string m_Data; private int m_nExample = 0; // ctor public SettingsForm(string _data) { m_Data = data; // you can now use this in SettingsForm … Read more
The const variable specifies whether a variable is modifiable or not. The constant value assigned will be used each time the variable is referenced. The value assigned cannot be modified during program execution. Bjarne Stroustrup’s explanation sums it up briefly: A class is typically declared in a header file and a header file is typically … Read more