I’m trying to use glut and MySQL (on C++) for a multiplayer video game, I already optimized the SELECT and managed to update players without losing performance but the part that keeps slowing down the game It’s: "UPDATE Players_ingame SET Pos_X = " + std::to_string(px) + ",Pos_Y = " + std::to_string(py) + ",Pos_Z = " ..
Category : asynchronous
My problem This function is supposed to accept() a connection from a client and return the new file descriptor newfd. The problem is that waiting for a connection freezes the Qt GUI. int tcp_connect(int sockfd) { struct sockaddr_storage client_addr; socklen_t sin_size = sizeof client_addr; int newfd = accept(sockfd, (struct sockaddr *)&client_addr, &sin_size); return newfd; } ..
I am doing a c++/winrt DLL project for a low energy Bluetooth device communication. Almost all the Bluetooth functions are asynchronous. I have a testing c++ console application which will call each of the DLL functions. My doubt is, how can I hold the test application main thread until the completion of the async DLL ..
I’m trying make a program with #include <future> library. When i try access a header function, i got an error. no instance of overloaded function "async" matches the argument list — argument types are: (std::launch, int ()) [line 16, 14] a pointer to a bound function may only be used to call the function [line ..
I am running several async line traces in unreal, and I want to wait until each of them is complete. Upon completion, I want to use their hit results (data.OutHits). However, upon completion, FTraceDatum still appears to contain its default values (Start and End both point to the origin and the OutHits size is always ..
In the code below, I am trying to return from a coroutine std :: vector . The problem is that only the result of the std::vector<int> get_return_object() is returned from the coroutine. When the co_return statement is executed, method void return_value(std::vector<int>&& value) is called, which fills the vector returned by method get_return_object(). But the vector ..
I’m trying to write asynchronous code on callbacks and stuck into this error: error: cannot declare field ‘std::_Head_base<3, Callback, false>::_M_head_impl’ to be of abstract type ‘Callback’ note: because the following virtual functions are pure within ‘Callback’ … error: no matching function for call to ‘std::tuple<api_add(int, int, Callback&&)::<lambda(int, int, Callback&&)>, int, int, Callback>::tuple(<brace-enclosed initializer list>)} }; ..
I’m working on a program that is supposed to make use of async and futures but i have come across a problem. When an output file is created nothing is in the file. It is just a blank file. I’m not sure if the issue s with reading the original file or write onto a ..
Is using async function in c++ is always a good idea? Literally I meant many times we may need to do some simple things like making a function that returns weather a no is prime etc so does it make c++ code faster or make it more slow? //Example Code #include <iostream> #include <future> using ..
I’m developing a C++ application whose output is a single big binary file (a couple of GBs, basically a large sequence of floats). The content of this file is generated asynchronoulsy by parallel processes. Each time a process finishes, its result has to be saved to its corresponding position inside the binary file in the ..
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