What is the meaning of the term “thread-safe”?

Question

Does it mean that two threads can\'t change the underlying data simultaneously? Or does it mean that the given code segment will run with predictable results when multiple t

Answer 1

Thread-safe-code works as specified, even when entered simultaneously by different threads. This often means, that internal data-structures or operations that should run uninterrupted are protected against different modifications at the same time.