_IndexOf
int32 _IndexOf(thread_id thread) const;
uint16 _IndexOf(BView* child) const;
result = (thread == fWriter || _IndexOf(thread) >= 0);
} else if (ReadLockInfo* info = _ReadLockInfoAt(_IndexOf(thread))) {
_DeleteReadLockInfo(_IndexOf(thread));
int32 index = _IndexOf(thread);
int32 index = _IndexOf(thread);
if (_lock.IsLocked() && _IndexOf(info) >= 0) {
int32 _IndexOf(RunnerInfo *info) const;