Fix wrong use of upgrade lock
authorAndrii Grynenko <andrii@fb.com>
Thu, 10 Nov 2016 04:19:57 +0000 (20:19 -0800)
committerFacebook Github Bot <facebook-github-bot-bot@fb.com>
Thu, 10 Nov 2016 04:23:27 +0000 (20:23 -0800)
commit0416e1ea440f816d5543feb5e834f09906ddfcab
treecbfa1485f9d2e175df095179aac6d708d57c08ab
parentdb9e283c930652840cf431b3cf596cb8890d12c5
Fix wrong use of upgrade lock

Reviewed By: yfeldblum, nbronson

Differential Revision: D4149681

fbshipit-source-id: 37bd1b0b7d1ad6e6fa813228307abebfe772012f
folly/Singleton-inl.h
folly/Singleton.cpp
folly/Singleton.h