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  2. Thread safety - Wikipedia

    en.wikipedia.org/wiki/Thread_safety

    However, deadlock-free guarantees cannot always be given, since deadlocks can be caused by callbacks and violation of architectural layering independent of the library itself. Software libraries can provide certain thread-safety guarantees. [5] For example, concurrent reads might be guaranteed to be thread-safe, but concurrent writes might not be.

  3. 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.

  4. Deadlock prevention algorithms - Wikipedia

    en.wikipedia.org/wiki/Deadlock_prevention_algorithms

    Distributed deadlocks can be detected either by constructing a global wait-for graph, from local wait-for graphs at a deadlock detector or by a distributed algorithm like edge chasing. Phantom deadlocks are deadlocks that are detected in a distributed system due to system internal delays but no longer actually exist at the time of detection.

  5. Lock (computer science) - Wikipedia

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

    Careless use of locks can result in deadlock or livelock. A number of strategies can be used to avoid or recover from deadlocks or livelocks, both at design-time and at run-time. (The most common strategy is to standardize the lock acquisition sequences so that combinations of inter-dependent locks are always acquired in a specifically defined ...

  6. Deadlock (computer science) - Wikipedia

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

    Phantom deadlocks are deadlocks that are falsely detected in a distributed system due to system internal delays but do not actually exist. For example, if a process releases a resource R1 and issues a request for R2 , and the first message is lost or delayed, a coordinator (detector of deadlocks) could falsely conclude a deadlock (if the ...

  7. 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.

  8. Lamport's bakery algorithm - Wikipedia

    en.wikipedia.org/wiki/Lamport's_bakery_algorithm

    The original proof shows that for overlapping reads and writes to the same storage cell only the write must be correct. [clarification needed] The read operation can return an arbitrary number. Therefore, this algorithm can be used to implement mutual exclusion on memory that lacks synchronisation primitives, e.g., a simple SCSI disk shared ...

  9. Semaphore (programming) - Wikipedia

    en.wikipedia.org/wiki/Semaphore_(programming)

    The "Passing the baton" pattern [3] [4] [5] proposed by Gregory R. Andrews is a generic scheme to solve many complex concurrent programming problems in which multiple processes compete for the same resource with complex access conditions (such as satisfying specific priority criteria or avoiding starvation). Given a shared resource, the pattern ...