39 lines
647 B
C++
39 lines
647 B
C++
#include <iostream>
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#include <mutex>
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#include <thread>
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extern "C" {
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int baz(int);
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}
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int bar(int i) {
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int j = i * i;
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return j;
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}
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int foo(int i) { return bar(i); }
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void call_and_wait(int &n) {
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std::cout << "waiting for computation!" << std::endl;
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while (baz(n) != 42)
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;
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std::cout << "finished computation!" << std::endl;
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}
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void compute_pow(int &n) { n = foo(n); }
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int main() {
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int n = 42;
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std::mutex mutex;
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std::unique_lock<std::mutex> lock(mutex);
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std::thread thread_1(call_and_wait, std::ref(n));
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std::thread thread_2(compute_pow, std::ref(n));
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lock.unlock();
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thread_1.join();
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thread_2.join();
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return 0;
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}
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