What the futex? A linux concurrency fundamental

WTF? Exactly. What is a futex? It is a tool that let's your program sleep when there is no work and wake up when work is ready. Ooooh. That sounds pretty efficient! (If you read this, comment "WTF" so we can confuse everyone else lol.) What is a synchronization primitive For you nerds out there, this may sound somewhat like another tool called conditional variables. Fun fact, in linux, they use futexes internally! For all the noobs out there, these futexes are what let you synchronize between tw