Is C++'s new operator reentrant (or async-safe)?

Question

The background is in this question of mine. Put shortly, I have to fork in a multithreaded C++ program, so I\'d like to figure out how much I can do when r

Answer 1

Thread-safety and re-entrance are not exactly the same.

AFAIK, the C++ ISO standard does not guarantee thread-safety for new and delete operators. But g++ implementation does provide thread-safetly (and it's one of the reasons it's slow).