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Commit a4c2602b authored by Eli Friedman's avatar Eli Friedman
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Initial implementation of __atomic_is_lock_free. The input is the size of an... 

Initial implementation of __atomic_is_lock_free.  The input is the size of an atomic type rather than an atomic type itself just to save some implementation pain; I can change that if it seems worthwhile.

I think this is the last hook needed for <atomic> besides defines for ATOMIC_CHAR_LOCK_FREE and friends.

llvm-svn: 142281
parent 6bf79084
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