#Writing a multithreaded application to check for variables while other parts of the code are running

18 messages · Page 1 of 1 (latest)

tulip crest
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I am working on a project and we have concluded that we will need to use multithreading(asked on this server earlier). I am unsure on how to use multithreading. I want to able to have a thread to be constantly reading a variable and the other thread to take the variable and run code based on it.

fading swallowBOT
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rotund goblet
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Look into atomic types if you're wanting to share an integral type

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And some type of mutex if you're wanting to share a class

tulip crest
#

okay. I will wee what I can find

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How do I create a thread?

tulip crest
rotund goblet
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I'm not looking at a massive file that you dump on the server go look stuff up

tulip crest
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I think moving if(bigPacket)... out of the void loop would help

tawdry kiln
# tulip crest How do I create a thread? 
void what_you_want_to_do()
{
    std::cout << "Do soemthing in a different thread";
}
int main()
{

    auto t = std::thread(&what_you_want_to_do);
    t.join();

}``` << like this, orrr use `std::jthread`
tulip crest
tawdry kiln
# tulip crest can you add a whole bunch of code in the "Do something in a different thread"

yeah as much as you want, It also doesn't have to be a whole other function it can be a lambda too and you can pass in variables too like this... ```cpp
void what_you_want_to_do()
{
std::cout << "Do soemthing in a different thread\n";
}

void what_you_want_to_do_2(int x, int y)
{
std::cout << x << y << std::endl;
}

int main()
{

auto t = std::thread(&what_you_want_to_do);
auto t1 = std::thread(&what_you_want_to_do_2, 10, 20);
auto t2 = std::thread([]() {
    std::cout << "yet another thread\n";
    });
t.join();
t1.join();
t2.join();

}

royal granite
lyric cosmos
#

This

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If you are only Reading from multiple thread you dont need mutex or atomic

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Only if u write

tulip crest
#

Okay

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!solved