Read-write lock optimization method, device and system and storage medium

Abstract

The invention discloses a read-write lock optimization method, device and system and a storage medium. The method comprises the following steps: firstly, receiving all locking requests by a to-be-scheduled queue, wherein the locking requests comprises a read lock request and a write lock request, and orderly inserting the locking request into the to-be-scheduled queue according to a read lock priority principle, so that the read lock request is ranked in front of the write lock request, the read lock can be ensured to be processed preferentially, and the characteristics and advantages of an original read-write lock method are ensured; then, under the condition of meeting the specified condition, moving all the locking requests in the to-be-scheduled queue to a to-be-executed queue according to an original sequence; and the locking requests in the to-be-executed queue are sequentially processed according to the read-write lock method, so that all the locking requests in the to-be-scheduled queue before can be processed, and the situation that the writing lock requests are blocked for a long time and cannot be processed is avoided.

Description

Technical field [0001] The invention relates to the field of read-write locks, in particular to a method, device, system and storage medium for optimizing read-write locks. Background technique [0002] When multiple threads share the same resource, the thread safety problem will not occur when multiple threads read the shared resource at the same time, but once one thread writes the shared data, other threads read and write the shared resource. Otherwise, data security issues will occur, so a read-write lock appears. The read-write lock allows multiple threads to acquire the read lock at the same time, but after one thread acquires the write lock, other threads will enter the waiting queue to wait. Read-write locks are especially suitable for scenarios where most of the cases are read and only a few cases are write, and it is a key solution technology for maintaining data consistency. [0003] Currently, the read-write lock in the standard library is an opportunistic lock. Once...

AI Technical Summary

Problems solved by technology

[0004] In this case, there will be the following problems: suppose thread A already holds a read lock, and thread B applies for a write lock. "deadlock"

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