tree f3250f735a97587da8ca61f0208f07bc28cd65fe
parent 763baa6cfcc8a9df9d3b7f676b2193ac7cd5ef51
author Jason Evans <je@fb.com> 1300501818 -0700
committer Jason Evans <je@fb.com> 1300501818 -0700

Use OSSpinLock*() for locking on OS X.

pthread_mutex_lock() can call malloc() on OS X (!!!), which causes
deadlock.  Work around this by using spinlocks that are built of more
primitive stuff.