Tag: multithreading
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Using atomics for thread synchronization in C++
In my previous blog post I wrote about spin locks, and how compilers must not move the locking loop above a prior unlock. After thinking about this done more, I realised that is not something specific to locks — the same issue arises with any two…
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Can non-overlapping spinlocks deadlock in C++?
There has been discussion on Twitter recently about whether or not the C++ memory model allows spinlocks to deadlock if they just use memory_order_acquire in lock and memory_order_release in unlock, due to compiler optimizations. The case in question i…