tree 348dc354388bab83e36f21d32f5d45788a25f563
parent 9e833bf0cf2c5bc0e6b65e4d96aa4f2b33113771
author Elliott Hughes <enh@google.com> 1410477103 -0700
committer Elliott Hughes <enh@google.com> 1410477103 -0700

Add pthread_gettid_np and re-expose __get_thread for LP32.

A lot of third-party code calls the private __get_thread symbol,
often as part of a backport of bionic's pthread_rwlock implementation.
Hopefully this will go away for LP64 (since you're guaranteed the
real implementation there), but there are still APIs that take a tid
and no way to convert between a pthread_t and a tid. pthread_gettid_np
is a public API for that. To aid the transition, make __get_thread
available again for LP32.

Bug: 14079438
Change-Id: I43fabc7f1918250d31d4665ffa4ca352d0dbeac1