A Close Look at a Spinlock

• abseil-cpp

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  Abseil Common Libraries (C++)

  

I was referring to https://github.com/abseil/abseil-cpp/blob/master/absl/base/i...

• darwin-libplatform

  7 126 0.0 C

  Discontinued Legacy mirror of Darwin Platform Library. Replaced by https://github.com/apple-oss-distributions/libplatform

  

Yes, but it's not so uncommon for "spinlocks" to evolve into not-actually-spinlocks. In the Linux kernel, spinlock_t is actually a mutex if PREEMPT_RT is enabled [1]. And Darwin has some code to do this in userspace [2], although I'm not sure if it's actually used.

[1] https://www.kernel.org/doc/html/latest/locking/locktypes.htm...

[2] https://github.com/apple/darwin-libplatform/blob/main/src/os...

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