c++ create a temporary thread object does not start a new thread

Asked Mar 10 '18 at 15:10

Active Mar 10 '18 at 15:23

Viewed 136 times

#include <iostream>
#include <thread>

void f() {
    std::cout << "hello" << std::endl;
}

int main() {
    std::thread(f);
    while(true) {}
}

Running above code hangs forever as I expected, but it doesn't print anything. if thread(f) is replaced with thread t(f), it prints hello. Does this mean my compiler has a bug? I'm using gcc 7.2.1 on arch linux.

edited Mar 10 '18 at 15:23

einpoklum

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asked Mar 10 '18 at 15:10

frank

`thread` is class not a function, therefore this didn't work. – Mohit Mar 10 '18 at 15:14
@Mohit: `std::thread` can be constructed from a function, can't it? – einpoklum Mar 10 '18 at 15:24
@einpoklum: you need a reference to the thread object – Mohit Mar 10 '18 at 15:26
@Mohit: No I don't, this code compiles fine. – einpoklum Mar 10 '18 at 15:27
1

@TypeIA: It's not a dupe; and running this code, you don't even get the terminate called. – einpoklum Mar 10 '18 at 15:27

c++ create a temporary thread object does not start a new thread

0 Answers0