Use the rb_thread_local_aref when not on a pthreads system
Use the rb_thread_local_aref when not on a pthreads system

MikaelSmith/ffi,yghannam/ffi,sparkchaser/ffi,sparkchaser/ffi,MikaelSmith/ffi,majioa/ffi,yghannam/ffi,mvz/ffi,sparkchaser/ffi,mvz/ffi,yghannam/ffi,yghannam/ffi,majioa/ffi,ffi/ffi,majioa/ffi,MikaelSmith/ffi,sparkchaser/ffi,mvz/ffi,tduehr/ffi,ffi/ffi,yghannam/ffi,ferventcoder/ffi,tduehr/ffi,tduehr/ffi,MikaelSmith/ffi,mvz/ffi,ffi/ffi,ferventcoder/ffi,majioa/ffi,ferventcoder/ffi,tduehr/ffi,ferventcoder/ffi