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#include <mutex>
#include <cstdio>
#include <thread>
void fooCallOnceVersion() {
static std::once_flag once;
std::call_once(once, []() {
std::printf("Foo call once\n");
});
}
void fooStaticVersion() {
static auto printLog = []() {
return std::printf("Foo static version\n");
}();
}
int main()
{
std::thread t1(fooCallOnceVersion), t2(fooCallOnceVersion), t3(fooStaticVersion), t4(fooStaticVersion);
t1.join();
t2.join();
t3.join();
t4.join();
return 0;
}
