HB_SCHED_YIELD     81 third_party/harfbuzz-ng/src/hb-mutex-private.hh #define hb_mutex_impl_lock(M)	HB_STMT_START { while (__sync_lock_test_and_set((M), 1)) HB_SCHED_YIELD (); } HB_STMT_END
HB_SCHED_YIELD     99 third_party/harfbuzz-ng/src/hb-mutex-private.hh #define hb_mutex_impl_lock(M)	HB_STMT_START { while (*(M)) HB_SCHED_YIELD (); (*(M))++; } HB_STMT_END