add a lock to make LOG_HEAD thread-safe #{317}

[Wenbin1002]

What problem were solved in this pull request?

Issue Number: close #317

Problem:

What is changed and how it works?

Other information

[CLAassistant]

All committers have signed the CLA.

[hnwyllmm]

Thanks for your contribution. But there are some problems should be resolved.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (9c2c6d7) 24.36% compared to head (3ba2fb8) 24.36%.
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #327   +/-   ##
=======================================
  Coverage   24.36%   24.36%           
=======================================
  Files         215      215           
  Lines       10632    10632           
=======================================
  Hits         2591     2591           
  Misses       8041     8041           

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[hnwyllmm]

I edit your file directly by clang-format.
When I tried to create a pull request, an error occurs so I give up.

[Wenbin1002]

I edit your file directly by clang-format. When I tried to create a pull request, an error occurs so I give up.

sry, my first time to contribute, I'll check next time.

[hnwyllmm]

That's fine. Thanks for your contribution.