Category: Programming

So I was cold last night…

krzaq Leave a comment 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35

#include <atomic>
#include <chrono>
#include <iomanip>
#include <iostream>
#include <string>
#include <thread>
#include <vector>
 
using namespace std;
 
int main()
{
	auto known_cores = thread::hardware_concurrency();
	auto cores = max(known_cores-1,decltype(known_cores){1});
 
	volatile bool done = false;
 
	auto f = [&](){	while(!done); };
 
	vector<thread> v;
	for(decltype(cores) i{0}; i < cores-1; ++i){
		v.push_back(thread{f});
	}
 
	string temp;
	getline(cin,temp);
 
	done = true;
 
	for(auto&& t : v){
		t.join();
	}
 
	return 0;
}

Switch on strings with C++11

krzaq 5 Comments

Many programmers new to C++, especially those coming from languages that focus on programmer productivity instead of performance per Watt, are surprised by the fact that one cannot use the switch statement with anything other than constant integers, enums or classes that have a single non-explicit integer or enum conversion operator. It’s a fairly reasonable concern – after all, there are lots of use cases for such a feature.

With the introduction of constexpr in C++11 last year it could be expected that such expressions of any type would become legit expression for the case label, but alas, they aren’t. That being said, it’s not impossible to do – at least in some form – or I wouldn’t be writing this post. With use of two very nifty C++11 features a very similar result can be achieved.

On destructors, interfaces and memory leaks

krzaq 3 Comments

Over the last month and a half* one of the things I’ve been tasked with was removing memory leaks from our software. At first, it looked like as if I was presented with a daunting responsibility, with the VLD spewing several thousands of apparent memory leaks after just a sample test-run of our main program. Fortunately for me, the vast majority of the leaks seemed to originate from three interface classes.

ImageShack Dumper 1.1

krzaq 4 Comments

For several years now, I’ve been using ImageShack to host my images. The service quality was good enough, despite occasional hiccups, but when imgur came around, I gladly switched. That said, I was still satisfied with ImageShack and would use it to host something every once in a while. Until last week, when I learned of their decision to turn evil and extort money from their users.

ImageShack’s extortion scheme: pay up or else we’ll delete images you uploaded before we changed the rules.

Instead of bending over and paying up, I’ve decided to simply stop using their services, which brings me to the reason for this post: the tool I needed to extract all my images from ImageShack.