cyb70289 commented on a change in pull request #12350:
URL: https://github.com/apache/arrow/pull/12350#discussion_r800435584
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File path: cpp/src/arrow/util/thread_pool.h
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@@ -373,7 +374,7 @@ class ARROW_EXPORT ThreadPool : public Executor {
State* state_;
bool shutdown_on_destroy_;
#ifndef _WIN32
- pid_t pid_;
+ std::atomic<pid_t> pid_;
Review comment:
~~This gives an uninitialized random value.~~
~~Zero initialize with `std::atomic<pid_t> pid_{}`.~~
Ah, I see it's initialized in constructor.
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