Operating Systems 2017F Lecture 19

[Notes]

Sample
sample

Additional Notes

Where's main?

• lots of program shave "main" functions - a function that runs first and controls the execution of the program
• Do these have "main" functions?
  • Linux kernel modules
  • FUSE applications?
  • the linux kernel?
  • node web applications?

In many systems, "main" just sets up even handlers

• the event loop can be implicit or explicit
  • or there may be no loop at all, just handlers and "interrupts" some kind
• event loops poll (check) to see when there are new events
• what are event loops for node app?
  • where are interrupts for node apps?
    • Incoming network requests, it's an event

OS kernels are essentially the same thing