tree dacf6a48262aa2193fc72accb846352c77bf9cdb
parent a781af7d5a1930d82d20c0cbc9d66fc8a42391e0
author Nicolas Capens <capn@google.com> 1499461276 -0400
committer Nicolas Capens <capn@google.com> 1499704935 +0000

Fix TLS for platforms without library constructors.

Some platforms don't support constructors that get called when the
shared library gets loaded. This results in the thread-local-storage
key to never be allocated. Instead we can check if it was allocated on
each use. Also prevent creating new 'current' state if it already
exists, and avoid pthreads undefined behavior.

Bug b/25629882

Change-Id: I5e2486f88185150b976d88d0144e4d13a349eb79
Reviewed-on: https://swiftshader-review.googlesource.com/10451
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>