Locking is useful when updating common global variables, or to serialize any other common resource. Parsing character strings A parsing service is provided as part of the HLL support for PL/I. This service is similar to the SSCANF function available in the C language and is intended to ...
Multi-threading improves program performance, but it also introduces complex synchronization issues. Locking is the traditional way to solve these problems, while lock-free programming is a more advanced but complex technique that can provide better performance and scalability in some cases. The key to...
SQL Server Concurrency: Locking, Blocking and Row Versioning (RedGate, By Kalen Delaney) SQL Server Execution Plans (PDF) (RedGate, By Grant Fritchey) SQL Server Execution Plans, Second Edition (PDF) (RedGate, By Grant Fritchey) SQL Server Hardware (RedGate, By Glenn Berry) SQL Server St...
File Locking is deprecated In the past File Locking was a very interesting and adventurous topic. Sometimes it worked, sometimes not, and you got interesting edge cases to solve again and again. It was fun, especially on NFS (Network File System). Only hardcore experts know the difference bet...
This means you don’t have to worry about locking mechanisms and other error-prone multi-threading techniques.Easier multi-threading is a major reason that functional programming is getting attention lately, but there are many other benefits of programming in a functional style. Side effect-free ...
SQL_ATTR_TXN_ISOLATION - This connection attribute determines the isolation level at which the connection or statement will operate. The isolation level determines the level of concurrency possible, and the level of locking required to execute the statement. Applications must choose an isolation level...
I solved this by making clone mice that had all their parents’ data. I also chose to eliminate the prioritized ThreadPool wrapper and any locking on the global maze cell data. In all likelihood I introduced some additional work, but I also eliminated many of the sources of errors that cou...
The structure of this algorithm guarantees that "action" is given exclusive access to its parameter so no additional locking is needed if action updates those fields. Further, there are guarantees that all predecessors have been updated and are not changing, and that no successor...
Guideline 1: Use consistent locking. For each location that needs synchronization, identify a lock that is always held when accessing that location. If some lock l is always held when memory location m is read or written, then we say that lguards the location m. It is extremely good pract...
Coarse-grained locking does not scale well, while the more sophisticated fine-grained locking exposes the code to deadlocks and data races. Therefore lock-free programming paradigms attract many researchers. One of the emerging lock-free programming concepts is transactional memory (TM) [39, 40]. ...