Computer Science 432/563
Operating Systems

Spring 2016, The College of Saint Rose

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Agenda

• Announcements
• Programming Project 2: CPU Scheduler Simulation continues
  • coding due midweek, writeup due next Monday
  • further discussion?
• Lecture 0x08 assignment recap
• Lab 3: Concurrency out
• Quick look back at mutual exclusion with atomic instructions
• Semaphores
  • abstract synchronization primitive
  • wait/signal semantics
  • using to solve the critical section problem
  • implementation idea
  • POSIX semaphores
  • pthreads mutexes
  • using as a general synchronization tool
• Classical problems of synchronization
  • Bounded Buffer with no busy waits
  • The Dining Philosophers
  • Readers-Writers

No New Lecture Assignment

Examples

• prodcons-shmem
• prodcons-pthreads

Links

• semaphores.com