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I know how to atomically write a value in x86 ASM. But how do I read one? The LOCK prefix can’t be used with mov.
To increase a value, I am doing:
lock inc dword ptr Counter
How do I read Counter in a thread-safe way?
I’m not an assembly expert, but word-sized (on x86, 32-bit) reads/writes should be atomic already.
The reason you need to lock the increment is because that’s both a read AND a write.