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Lecture 6: Slide 23 of 61

Semaphore as General Synchronization Tool
  • Execute B in Pj only after A executed in Pi
  • Use semaphore flag initialized to 0
  • Code:
    Pi
    .
    .
    .
    A
    signal(flag)     		Pj
    .
    .
    .
    wait(flag)
    B

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