Stupid simple Pthread example for reference

pthreads.cpp

#include <iostream>
#include <cstdio>
#include <pthread.h>
#include <unistd.h>

typedef struct {
	int thread_num;
} data_t;

void *task (void * data) {
	data_t * d = (data_t *) data;
	for(int i = 0; i < 100; ++i) {
		printf("test %d %d\n", d->thread_num, i);
		usleep(500000);
	}
}

int main () {

	pthread_t pool[100];
	data_t data[100];

	// create 100 threads running the task 
	for(int i = 0; i < 100; ++i) {
		data[i].thread_num = i;
		pthread_create(&pool[i], NULL, task, &data[i]);
	}

	// wait for all the threads to finish
	for(int i = 0; i < 100; ++i)
		pthread_join(pool[i], NULL);

	return 0;
}