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authormjg <mjg@FreeBSD.org>2016-06-01 18:32:20 +0000
committermjg <mjg@FreeBSD.org>2016-06-01 18:32:20 +0000
commit25669dd1d9562b9b1717d5ef59b15e1716c81634 (patch)
treefd835dd80fc66ba43f6cdb85dc37e7ec1c12c055 /lib/libc
parent1a924c729cc82916157766dbb0389b73fd4a79d8 (diff)
downloadFreeBSD-src-25669dd1d9562b9b1717d5ef59b15e1716c81634.zip
FreeBSD-src-25669dd1d9562b9b1717d5ef59b15e1716c81634.tar.gz
Microoptimize locking primitives by avoiding unnecessary atomic ops.
Inline version of primitives do an atomic op and if it fails they fallback to actual primitives, which immediately retry the atomic op. The obvious optimisation is to check if the lock is free and only then proceed to do an atomic op. Reviewed by: jhb, vangyzen
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0 files changed, 0 insertions, 0 deletions
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