add volatile in double-checked lock #466
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Codecov Report
@@ Coverage Diff @@
## master #466 +/- ##
=========================================
Coverage 37.66% 37.66%
Complexity 983 983
=========================================
Files 235 235
Lines 7429 7429
Branches 1017 1017
=========================================
Hits 2798 2798
Misses 4271 4271
Partials 360 360
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Describe what this PR does / why we need it
add volatile in double-checked lock and fix concurrent problem
Does this pull request fix one issue?
Describe how you did it
add volatile in double-checked lock
Describe how to verify it
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