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  2. Deadlock prevention algorithms - Wikipedia

    en.wikipedia.org/wiki/Deadlock_prevention_algorithms

    The second does not do distributed deadlock prevention. But the second one is redefined to prevent a deadlock scenario the first one does not address. Recursively, only one thread is allowed to pass through a lock. If other threads enter the lock, they must wait until the initial thread that passed through completes n number of times.

  3. Thread safety - Wikipedia

    en.wikipedia.org/wiki/Thread_safety

    Thread safe, MT-safe: Use a mutex for every single resource to guarantee the thread to be free of race conditions when those resources are accessed by multiple threads simultaneously. Thread safety guarantees usually also include design steps to prevent or limit the risk of different forms of deadlocks , as well as optimizations to maximize ...

  4. Lock (computer science) - Wikipedia

    en.wikipedia.org/wiki/Lock_(computer_science)

    The priority ceiling protocol can be used on uniprocessor systems to minimize the worst-case priority-inversion duration, as well as prevent deadlock. Convoying: all other threads have to wait if a thread holding a lock is descheduled due to a time-slice interrupt or page fault. Some concurrency control strategies avoid some or all of these ...

  5. Non-blocking algorithm - Wikipedia

    en.wikipedia.org/wiki/Non-blocking_algorithm

    An algorithm is lock-free if, when the program threads are run for a sufficiently long time, at least one of the threads makes progress (for some sensible definition of progress). All wait-free algorithms are lock-free. In particular, if one thread is suspended, then a lock-free algorithm guarantees that the remaining threads can still make ...

  6. Readers–writer lock - Wikipedia

    en.wikipedia.org/wiki/Readers–writer_lock

    Upgrading a lock from read-mode to write-mode is prone to deadlocks, since whenever two threads holding reader locks both attempt to upgrade to writer locks, a deadlock is created that can only be broken by one of the threads releasing its reader lock. The deadlock can be avoided by allowing only one thread to acquire the lock in "read-mode ...

  7. Chandy–Misra–Haas algorithm resource model - Wikipedia

    en.wikipedia.org/wiki/Chandy–Misra–Haas...

    occurrence of deadlock in distributed system. P 1 initiates deadlock detection. C 1 sends the probe saying P 2 depends on P 3. Once the message is received by C 2, it checks whether P 3 is idle. P 3 is idle because it is locally dependent on P 4 and updates dependent 3 (2) to True. As above, C 2 sends probe to C 3 and C 3 sends probe to C 1.

  8. Banker's algorithm - Wikipedia

    en.wikipedia.org/wiki/Banker's_algorithm

    Banker's algorithm is a resource allocation and deadlock avoidance algorithm developed by Edsger Dijkstra that tests for safety by simulating the allocation of predetermined maximum possible amounts of all resources, and then makes an "s-state" check to test for possible deadlock conditions for all other pending activities, before deciding whether allocation should be allowed to continue.

  9. Critical section - Wikipedia

    en.wikipedia.org/wiki/Critical_section

    The thread searching the element may have a hit, whereas the other thread may subsequently delete it. These scenarios will cause issues in the program running by providing false data. To prevent this, one method is to keep the entire data structure under critical section so that only one operation is handled at a time.