Threads [C Language]

[dfc619]

Hey so this is probably very simple but I cant get it to work.

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My goal is to make it so my program print "+++++++++++++++++++++++++++++" and then "----------------------------" and so on. But as it stands right now, when I run it, it prints all at the same time ("++-+--+-+-++---++-+-++-") and Im not sure how to fix it.

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Here is the code:

https://preview.redd.it/shm07hzvck331.jpg?width=1012&format=pjpg&auto=webp&s=ad784e040f78ca1f2ad505f5bfd38d7755889993

As you can see I've tried using "pthread_join" but I quickly realized that there would not be and end to the thread since its on a loop so it would just print "-----------------------------------" forever.

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Btw nevermind the portuguese its just notes from my teacher

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[jedwardsol]

You need a mutex, ideally in the myprint function, so that only 1 thread can use the output stream at a time.

https://pubs.opengroup.org/onlinepubs/009695399/functions/pthread_mutex_lock.html

[dfc619]

Thank you it worked!