#include <pthread.h>
#include <stdlib.h>
#include <unistd.h>

#define SIZE 32768

pthread_t child_thread;
pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;

int table[SIZE];

int cmp(const void* a1, const void* a2){
	return *((int*)a2) - *((int*)a1);
}

void* child(void* args){
	pthread_mutex_lock(&mutex);
	for (int i = 0; i < SIZE; ++i) {
		table[i] = rand();
	}
	pthread_mutex_unlock(&mutex);
	sleep(1);
	pthread_mutex_lock(&mutex);
	return NULL;
}

int main(void)
{
	pthread_create(&child_thread, NULL, child, NULL);

	pthread_mutex_lock(&mutex);
	qsort(table, SIZE, sizeof(int), cmp);
	pthread_mutex_unlock(&mutex);
}