What is the reason why golang lock fails? How to deal with it?

Golang is a fast, efficient, concise and clean programming language that has many application scenarios in actual development. The lock mechanism in Golang is a key method to ensure that data can be shared correctly when multiple coroutines operate on the same resource. However, when using Golang for development, we sometimes find that locking fails. So, why is this phenomenon?

Generally speaking, the lock mechanism provided in Golang is very stable and safe, and is covered in various standard libraries. During use, it will automatically adjust as needed to ensure that in the case of multiple coroutines, data sharing will not cause competition issues.

However, in some cases, locking may fail. That is to say, when the coroutine requests Golang to automatically lock, the automatically added lock is not successfully added to the resource. Lock, causing the coroutine to be unable to access resources normally.

So, what is the reason for this situation?

1. Too many locked resources

If there are too many locked resources, the lock contention will be more intense and the probability of lock failure will increase. Therefore, before locking, it is necessary to optimize the code as much as possible to reduce the number of locked resources.

2. The locking time is too long

When performing a locking operation, if the lock is occupied for too long, it will cause other coroutines to wait for too long , increasing the probability of lock failure. Therefore, when performing a locking operation, try to ensure that the locking time is as short as possible.

3. The number of coroutines is too many

In the actual application of multi-coroutines, due to the large number of coroutines, the contention for locks will be more intense. The probability of lock failure will increase. Therefore, when performing a locking operation, it is necessary to determine the number of coroutines first to ensure that there will not be too many coroutines competing for the same lock.

4. Unreasonable program logic

During program calculation, if concurrent execution is not taken into account, locking failure may occur. For example, if the resource has been modified before a coroutine locks, then the lock cannot be successfully obtained when the coroutine requests the lock. Therefore, when writing a program, special attention needs to be paid to the rationality of the program logic.

In short, although the phenomenon of lock failure is relatively rare, it still needs to be paid enough attention in actual use. Only through appropriate optimization procedures and perfect logic design can Golang's lock mechanism be made more stable and efficient.

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