void* philospher(void* args) {
size_t id = *(size_t*)args;
size_t first_chopstick = (id == n - 1 ? 0 : id);
size_t second_chopstick = (id == n - 1 ? id : id + 1);
for (size_t i = 0; i < 3; i++) {
chopsticks[first_chopstick].lock();
chopsticks[second_chopstick].lock();
activity_lock.lock();
activities[id] = eating;
print_activities();
std::cout << id << " starts eating" << std::endl;
activity_lock.unlock();
// eat
sleep(2 + (rand() % 3));
chopsticks[second_chopstick].unlock();
chopsticks[first_chopstick].unlock();
activity_lock.lock();
activities[id] = thinking;
print_activities();
std::cout << id << " stops eating" << std::endl;
activity_lock.unlock();
// think
sleep(2 + (rand() % 8));
}
return nullptr;
}
int main()
{
int start[] = {1, 3, 1, 5, 8, 6};
int finish[] = {2, 6, 6, 7, 10, 8};
int n = sizeof(start) / sizeof(start[0]);
print_activities(start, finish, n);
return 0;
}