tree cad3f812fe4ac0edab614c73fab734d98bf06a63
parent 6e9d51701eabe26d2132a214e07b10384ea60a8c
author David 'Digit' Turner <digit@google.com> 1323256844 +0100
committer David 'Digit' Turner <digit@google.com> 1323291996 +0100

libc: optimize pthread_once() implementation.

This patch changes the implementation of pthread_once()
to avoid the use of a single global recursive mutex. This
should also slightly speed up the non-common case where
we have to call the init function, or wait for another
thread to finish the call.

Change-Id: I8a93f4386c56fb89b5d0eb716689c2ce43bdcad9