写一个高效的缓存组件（对象池）

public abstract class SimpleObjPool<T> {
int _locker = 0;
int _cnt = 0;
T[] _ts;
public SimpleObjPool(int MaxSize) {
_ts = new T[MaxSize];
}
protected abstract T NewObj();
public T GetObj() {
int a = Interlocked.Exchange(ref _locker, 1);
if (a == 0) {
if (_cnt > 0) {
_cnt--;
T t = _ts[_cnt];
Interlocked.Exchange(ref _locker, 0);
return t;
}
Interlocked.Exchange(ref _locker, 0);
}
return NewObj();
}
public virtual bool FreeObj(T t) {
int a = Interlocked.Exchange(ref _locker, 1);
if (a == 0) {
if (_cnt < _ts.Length) {
_ts[_cnt] = t;
_cnt++;
Interlocked.Exchange(ref _locker, 0);
return true;
}
Interlocked.Exchange(ref _locker, 0);
}
return false;
}
}