[erlang-questions] Lockfree now()

Wojtek Narczyński <>
Thu Jul 12 19:08:28 CEST 2012

On 07/12/2012 02:58 PM, Erik Søe Sørensen wrote:
> When I implemented now() in Erjang, I found a lock-free algorithm for 
> it which has the right "timestamp must be monotonically increasing" 
> property.

" It is also guaranteed that subsequent calls to this BIF returns 
continuously increasing values."

I don't think your solution quarrantees this.

It can be implemented with N-bit CAS for N-bit time value.

Wojtek Narczynski
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