File: hello.c

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#include <rtl.h>
#include <time.h>
#include <pthread.h>

pthread_t thread;

void * start_routine(void *arg)
{
	struct sched_param p;
	p . sched_priority = 1;
	pthread_setschedparam (pthread_self(), SCHED_FIFO, &p);

	pthread_make_periodic_np (pthread_self(), gethrtime(), 500000000);

	while (1) {
		pthread_wait_np ();
		rtl_printf("I'm here; my arg is %x\n", (unsigned) arg);
	}
	return 0;
}

int init_module(void) {
	return pthread_create (&thread, NULL, start_routine, 0);
}

void cleanup_module(void) {
	pthread_delete_np (thread);
}