Run two instances of a SFML C++ app in Xcode

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  I have been asked in my project to profile memory usage of a C++ application that runs on Linux for an embedded like device. We need to know this in order to decide how much RAM we need.

  I have done some research and found many tools or commands to find the max memory usage of a process when it is running.

  Here are those:

  1. top Command: top -p $Pid

  2. ps Command: ps -o rss=$pid

  3. pmap Command: pmap -x $pid

  4. valgrind -massif valgrind --tool=massif --pages-as-heap=yes program

  5. smaps Used the following link: Script

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  VM, RSS and Shared parts are having different values in all of them.

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• c++, Object of class changes when creating a new object

  I have created a class matrix that besides having some member functions, operators and a constructor has two variables:

  int m, which is the dimension (side length) of the quadratic matrix

  double a[], which contains the elements of the matrix.

  As long as I only create one matrix object A all seem to work fine and all my member operators and functions work as they should.

  My problem is that once I create a second object B of the class matrix the variables of object A changes as well.

  The relevant code is as follows:

  class Matrix{
      private:
          const int m;
          double a[];
      public:
          Matrix(int inpm);
          void fillMatrix(const double inpa[]);
  };
  Matrix::Matrix(int inpm): m(inpm){
      a[impm*inpm];
  }
  void Matrix::fillmatrix(const double inpa[]){
      for (int i ; i<m*m ; i++){
          a[i]=inpa[i];
      }
  }
  
  int min =2;
  double ain[min*min] = {1,2,3,4};
  double bin[min*min] = {5,6,7,8};
  
  Matrix A(min);
  Matrix B(min);
  
  A.fillMatrix(ain);
  //A looks precisely as it should here:
  //m=2, a={1,2,3,4}
  B.fillMatrix(bin);
  //Here B looks as it should but A has changed to:
  //m=0, a={7,8,3,4}
  

  obviously the change to the first object occur when I run fillMatrix() for the second object but I cannot figure out why, especially since m is a constant integer.

  I'm really stuck so grateful for all help.

  PS: I use another member function "void printMatrix();" using std:cout to look at the values of m and all elements in a.
• Mfast decoder.decode Failed

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  message_cref msg = decoder.decode(start,end);
  

  it is throwing

  \src\mfast\coder\decoder\fast_istreambuf.h(47): Throw in f
  unction unsigned char __thiscall mfast::fast_istreambuf::sbumpc(void)
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  the Data Which i get from exchange is

  "Ýÿ”20181009-06:49:09.66±±jÏ€€€‚_À€ôCOCUDAKL20DEC201¸2972³ø2?IÁ€€€€€€€s•€€€€€€€€€€“ö€‚ "

  Converting it to UTF-8 using C++/CLI

  array<Byte>^ byteArray = Encoding::UTF8->GetBytes(toBeEncoded);
  
      for each(Byte v in byteArray)
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          cout << "Manipulated String \n" << mani << endl;
  
          int length = mani.length();
          strcpy_s(fast_message,3000,mani.c_str());
  
  Here my motive is to get data in this Format:char  fast_message[] = { 0xC3, 0x9D, 0xC3, 0xBF, 0xE2, 0x80, 0x9D, 0x32, 0x30, 0x31, 0x38, 0x31, 0x30, 0x30, 0x39, 0x2D, 0x30, 0x36, 0x3A, 0x34, 0x39, 0x3A, 0x30, 0x39, 0x2E, 0x36, 0x36, 0xC2, 0xB1, 0xC2, 0xB1, 0x1F, 0x6A, 0xC3, 0x8F, 0xE2, 0x82, 0xAC, 0xE2, 0x82, 0xAC, 0xE2, 0x82, 0xAC, 0xE2, 0x80, 0x9A, 0x5F, 0x7F, 0x7F, 0xC3, 0x80, 0xE2, 0x82, 0xAC, 0xC3, 0xB4, 0x43, 0x4F, 0x43, 0x55, 0x44, 0x41, 0x4B, 0x4C, 0x32, 0x30, 0x44, 0x45, 0x43, 0x32, 0x30, 0x31, 0xC2, 0xB8, 0x32, 0x39, 0x37, 0x32, 0xC2, 0xB3, 0xC3, 0xB8, 0x05, 0x08, 0x32, 0x3F, 0x49, 0xC3, 0x81, 0xE2, 0x82, 0xAC, 0xE2, 0x82, 0xAC, 0xE2, 0x82, 0xAC, 0xE2, 0x82, 0xAC, 0xE2, 0x82, 0xAC, 0xE2, 0x82, 0xAC, 0xE2, 0x82, 0xAC, 0x73, 0xE2, 0x80, 0xA2, 0xE2, 0x82, 0xAC, 0xE2, 0x82, 0xAC, 0xE2, 0x82, 0xAC, 0xE2, 0x82, 0xAC, 0xE2, 0x82, 0xAC, 0xE2, 0x82, 0xAC, 0xE2, 0x82, 0xAC, 0xE2, 0x82, 0xAC, 0xE2, 0x82, 0xAC, 0xE2, 0x82, 0xAC, 0xE2, 0x80, 0x9C, 0xC3, 0xB6, 0xE2, 0x82, 0xAC, 0xE2, 0x80, 0x9A, 0x03, 0xC3, 0xA2, 0xE2, 0x82, 0xAC, 0xE2, 0x82, 0xAC };
  

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  I'm still new to this but I'm confused on why my search bar does not work any time i put in a url address. I'm trying to make a video downloader app.

  import UIKit
  import AFNetworking
  import Alamofire
  
  class ViewController: UIViewController {
  
  @IBOutlet var Webview: UIWebView!
  @IBOutlet var SearchBar: UISearchBar!
  
  override func viewDidLoad() {
  
  
      if let url = URL(string: "https://www.google.com"){
  
          let requestObj = URLRequest(url: url)
  
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      SearchBar.text = "http://"
  
  }
  
  func searchBarSearchButtonClicked(searchbar: UISearchBar) {
  
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      let text = SearchBar.text
      let url = NSURL(string: text!)
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  Maybe i am using std::thread wrong? I have a 12 thread cpu and built a render engine. More like a plotter for stuff like perlin noise etc... Since rendering was quite slow, i used std::thread, to make full use of my 12 cores. The rendering speed actually increased dramatically but my cpu usage won't go any higher than it would by just using one thread....

  This is my code responsible for the rendering... let me try to explain it...

  void Renderer::Render(sf::Image * _img,
                        sf::Vector2f _dims,
                        unsigned _threadCount)
  {
      im = _img;
      dims = _dims;
  
      im->create(dims.x, dims.y, sf::Color(100, 0, 0, 255));
  
      static float bar = 0.3f;
      float g = 0.01f;
  
      std::vector < std::thread > workers;
  
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      {
          workers.push_back(std::thread(Renderer::RenderThread,
                                        sf::IntRect((dims.x / _threadCount) * i,
                                                    0,
                                                    (dims.x / _threadCount) * (i + 1),
                                                    dims.y),
                                        bar,
                                        g,
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                                                  0)));
      }
  
      bar += 0.01f;
  
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      {
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      return;
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  {
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      {
          for (unsigned y = area.top + 1; y < area.height + 1; y++)
          {
              im->setPixel(x - 1, y - 1, ImAlg::Tiles0(x, y, bar, 5));
          }
      }
  
      return;
  }
  

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  I'm having a bit of trouble using c++ external libraries(e.g SDL2, SFML). I'm currently eclipse CDT and MinGW on windows 7, 64 bit version.

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  Step 9:
  
  change the configuration to debug configuration
  
  MinGW C++ Linker -> Libraries -> Library search path
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  winmm
  

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