A shared memory lock management control method and system

Abstract

The invention provides a method and system for shared memory lock management control. The method and system for shared memory lock management control are applied to the process of shared memory access by a plurality of processes. The method for shared memory lock management control comprises the steps of determining and distinguishing obtaining modes of a shared memory lock for each process according to an interface function called by each process; setting a global variable, presetting the value of the global variable according to the type of the process and a system state, and distinguishing a processing mode of the process in a deadlock state through the value of the global variable. According to the method and system for shared memory lock management control, the correction during the shared memory access by each process can be guaranteed, different lock obtaining policies can be adopted when the process obtains the lock; besides, the deadlock problem caused by process abnormality can be effectively solved, different processing modes can also be adopted according to the different system states in the deadlock treatment process, and the system is more flexible, more reliable and more stable.

Description

technical field [0001] The present invention relates to the technical field of home gateways, in particular to the technical field of shared memory data in home gateway equipment, and specifically relates to a shared memory lock management and control method and system. Background technique [0002] Shared memory is a portion of physical memory shared by multiple processes. Shared memory is the fastest way to share data between processes. When a process writes data to a shared memory area, all processes sharing this memory area can immediately see the contents. At present, multi-process design is adopted in linux embedded system, and shared memory is used for communication between multiple processes. The communication process will update the collected data to the shared memory, and other processes need to read data from the shared memory. Such a model of "one process writes, multiple processes reads" requires the use of read-write locks to improve access efficiency. [00...

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Problems solved by technology

[0010] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a shared memory lock management control method and system, which is used to solve the problem that the process in the prior art tends to cause system paralysis and system failure when accessing the shared memory of the system. stability problem

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