get_spinlock(tls_index_lock,(long)th);
if(!sym->tls_index) {
sym->tls_index=SymbolValue(FREE_TLS_INDEX,0);
SetSymbolValue(FREE_TLS_INDEX,
make_fixnum(fixnum_value(sym->tls_index)+1),0);
get_spinlock(tls_index_lock,(long)th);
if(!sym->tls_index) {
sym->tls_index=SymbolValue(FREE_TLS_INDEX,0);
SetSymbolValue(FREE_TLS_INDEX,
make_fixnum(fixnum_value(sym->tls_index)+1),0);