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Re: C++11 atomic library notes
On Sat, 1 Oct 2011, Andrew MacLeod wrote:
Ah ok, I had understood:
* if __atomic_store_8 is inlined on line 18, it should also be inlined
on line 42
when instead it is:
* we can't have a locked addition and a lock-free subtraction (hence
the __atomic_is_lock_free which only takes a size as argument)
Makes perfect sense, thank you for the precision.
I Added another line in the document to clarify this, thanks.
By the way, does it make sense to work atomically on a 16 byte object,
and also work atomically on its first 8 bytes, thus potentially
requiring __atomic_is_lock_free not to depend on the size?
not really... working on the first 8 bytes of the 16 byte atomic object
'breaks' the atomicity of the 16 byte object. Volatility of the object
is the only thing that *may* impact this, AFAICT.
Andrew