How did 1977's Car Polo arcade game by Exidy perform hitbox detection, and rigid body collision and movement within the ball?
JoshJosh 17011 silver badge44 bronze badges 1 Indeed, lots of non-x86 ISAs use LL/SC. The small print of how they take care of to watch a cache line (or much larger location) for activity from other cores is non-evident difficult component there.
For instance, I have a library that generates occasions of some course. Every single of these occasions should have a unique integer ID, as these situations represent commands getting despatched to your server, and every command should have a singular ID.
4 @jogojapan I hope no one assumes that a collection of concurrent objects is usually a concurrent assortment of objects.
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Bitcoin blockchain can only development With all the miners who finish transactions. That's why the miners as well as their fees are essential into the Bitcoin ecosystem.
a thread contacting m2 could read 0, 1234567890L, or Another random value since the statement atomic i = 1234567890L will not be sure to be atomic for a long (a JVM could generate the main 32 bits and the final 32 bits in two functions along with a thread may possibly notice i in between).
motions is often mapped on to 3 extremely simplified coordinates -- the magic of chemistry in its whole atomic
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Considering the fact that many threads are allowed to mail commands concurrently, I use an AtomicInteger to create those IDs. Another strategy would be to work with some sort of lock and an everyday integer, but that's both equally slower and less exquisite.
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Mackie MesserMackie Messer 7,32833 gold badges3737 silver badges4141 bronze badges 1 Really, cache-line-split locked Guidelines are disastrously slow (just like the old bus-lock mechanism that stalls memory access by all cores), so slow that there is a perf counter party especially for that, and up to date CPUs have included help for producing that constantly fault to permit detection of stray usage even in VMs, and so on.
When two threads do the job at the same time over a shared variable and a type of actions involves crafting, both of those threads really have to make use of atomic operations.