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RE: Networking - C Threads in Linux
It's "Random" how threads will run on the CPU.
To make it even easier to see that this exact thing happens I put a random sleep timer for each thread to be run so that they don't quit directly...
Of course thread 0 will be "made" much faster then thread N-1, but which thread will start running the example() code is random, cause the "timing" of the CPU is not so sequential at all.
Even if you have an 4Core/8Thread i7 (like me) you will see that 8 threads will not run in this exact order or even at the same time, but thread 7 might even print out a message before thread 0...
Thanks @drifter1 for detailed explanation. Could you please tell me what happens below. I think I confused with thread joining.
for(i = 0; i < N; i++){
pthread_join(threads[i], NULL);
}
Haha of course...
When a process or thread runs the main process/thread that created it must finish after it.
For threads we use the function pthread_join() with an important parameter being the thread_id (the number which represents the thread in the Operating system).
So, because we have N threads and because the id's are stored in an array, we have a for loop so that the main process/thread waits for all of them :)