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topecongiro/double_width_compare_and_swap.cpp

Created November 28, 2016 10:59
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Double-width compare-and-swap implementation without asm such as CMPXCHG16B.
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double_width_compare_and_swap.cpp
using u128_t = usigned __int128;
bool dwcas(u128_t* ptr, u128_t oldval, u128_t newval) {
return __sync_bool_compare_and_swap(ptr, oldval, newval);
}
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