refactor: remove wakeup loop by real lock

[rueian]

No description provided.

[codecov]

Codecov Report

Merging #9 (c13154e) into master (4d57cd8) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master       #9   +/-   ##
=======================================
  Coverage   97.39%   97.39%           
=======================================
  Files          26       26           
  Lines       17198    17201    +3     
=======================================
+ Hits        16750    16753    +3     
  Misses        391      391           
  Partials       57       57           

Impacted Files	Coverage Δ
pipe.go	99.74% <100.00%> (+<0.01%)	⬆️

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