Kimi K3 — 專為長時間程式開發與代理任務打造的開放前沿模型

Kimi K3 的真實輸出

一則提示詞，以 low 推理強度送給 Kimi K3。未經編輯。

Explain the difference between a mutex and a semaphore in two short paragraphs, and say when to use each.

A mutex (mutual exclusion) is a locking mechanism with ownership: the thread that locks it must be the one to unlock it, and only one thread can hold it at a time. It exists to protect shared resources from concurrent access. A semaphore is a counter with no ownership: one thread can signal (increment) it while another waits (decrements) it. A binary semaphore acts like a mutex, but counting semaphores allow N threads to access a pool of resources simultaneously. When to use each: Use a mutex when you need exclusive access to shared data—like protecting a critical section or data structure from race conditions. Use a semaphore when you're coordinating or signaling between threads—like limiting access to a fixed pool of connections, implementing producer-consumer queues, or notifying one thread that work is available.

產生於 2026-09-28。每次執行的回答都可能不同。