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#define _GNU_SOURCE
#include <assert.h>
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <unistd.h>
#define NUM_THREADS 100
typedef void *(* thread_func)(void *);
void *somefunction(int *arg)
{
int loops = rand();
for (int i = 0; i < loops; i++) {
pthread_yield();
for (;i < loops; i++);
}
printf("%d:\t%d\n", *arg, loops);
return NULL;
}
int main(void)
{
srand(time(NULL));
pthread_t threads[NUM_THREADS];
int args[NUM_THREADS];
for (int i = 0; i < NUM_THREADS; i++) {
args[i] = i;
if (pthread_create(&threads[i], NULL, (thread_func)somefunction, args + i))
return EXIT_FAILURE;
}
for (int i = 0; i < NUM_THREADS; i++)
if (pthread_join(threads[i], NULL))
return EXIT_FAILURE;
return EXIT_SUCCESS;
}
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