94.401 Operating Systems

126

Using semaphores to synchronize processes

nWe have 2 processes: P1 and P2 nStatement S1 in P1 needs to be performed before statement S2 in P2 nThen define a semaphore “synch”

nInitialize synch to 0

nProper synchronization is achieved by having in P1:

S1;

signal(synch);

nAnd having in P2:

wait(synch);

S2;