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#include <thread>
#include "baz.h"
std::condition_variable cv;
std::mutex mutex;
int bar(int i) {
int j = i * i;
return j;
}
int foo(int i) { return bar(i); }
void compute_pow(int &n) {
std::unique_lock<std::mutex> lock(mutex);
n = foo(n);
lock.unlock();
cv.notify_one(); // waiting thread is notified with n == 42 * 42, cv.wait
// returns
}
void call_and_wait(int &n) { baz(n, mutex, cv); }
int main() {
int n = 42;
std::thread thread_1(call_and_wait, std::ref(n));
std::thread thread_2(compute_pow, std::ref(n));
thread_1.join();
thread_2.join();
return 0;
}
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