#deadlock

Question

Please explain why??what are monitors??

Comments

Don't know about monitors , never studied about monitors(GATE never asked monitors)

But about semaphore, they guarantee nothing , use them in an careless manner and they will lead to deadlock , fail mutual exclusion , fail progress.

Answer 1

Monitors are operating system resources which is nothing but a collection of procedures, variables and data structures.

They are used to achieve atomic mutual exclusion and process synchronization.

Two important point should kept in mind

1) Only one thread can run inside monitor at a time so mutual exclusion always achieved

2) If another thread try to execute monitor process it is blocked until the first completed it's execution, thus more restrictive than semaphore

For more reference

http://www.geeksforgeeks.org/monitors/