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#include <assert.h>
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
pthread_t worker_self_thread;
void *worker(void *arguments)
{
// Check pthread_self() returns a consistent value.
const pthread_t self1 = pthread_self();
const pthread_t self2 = pthread_self();
assert(pthread_equal(self1, self2));
worker_self_thread = self1;
pthread_exit(NULL);
}
int main(void)
{
pthread_t worker_thread;
const pthread_attr_t *const attributes = NULL;
void *const worker_argument = NULL;
const int create_status =
pthread_create(&worker_thread, attributes, &worker, worker_argument);
assert(create_status == 0);
const int join_status = pthread_join(worker_thread, NULL);
assert(join_status == 0);
// Check main thread self is different from worker thread self.
const pthread_t main_thread = pthread_self();
assert(!pthread_equal(main_thread, worker_self_thread));
return EXIT_SUCCESS;
}
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