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School of Computer Science & Engineering
University of New South Wales
 Advanced Operating Systems 
  COMP9242 2002/S2 
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Next: Access matrix properties Up: 03-caps Previous: Protection Mechanisms

Access matrix model

Objects
Agents \(S_1\) \(S_2\) \(O_3\) \(O_4\)
\(S_1\) terminate wait, signal, read
send
\(S_2\) wait, signal, read, execute
terminate write
\(S_3\) wait, signal,
receive
\(S_4\) control execute write



Used by protection system to determine whether access is allowed

next up previous
Next: Access matrix properties Up: 03-caps Previous: Protection Mechanisms
Gernot Heiser 2002-08-15