Writing a single line for cout "thread safe" in C ++ 98

Question

I know that, strictly speaking, in C ++ 98, nothing is thread safe, because there are no threads in the standard before C ++ 11. However, in practice, threads were used in C ++ long before C ++ 11.

So, let's say two pthreadssimultaneously call this:

void printSomething(){
    std::cout << "something\n";
}

What can lead to the alternation of two outputs? Or will I always get in practice two lines containing "something"?

I ask about this because this question made me wonder, and I found this answer by indicating:

... in C ++ 11, std :: cout is thread safe.

but this answer is an example along the line

std::cout << "aaaaaaaaaa" << "bbbbbbbbbb";

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Answer 1

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