我怎样才能使它通用?
class AtomicReference
{
private Object _value;
public AtomicReference()
{
_value = new Object();
}
public AtomicReference(Object value)
{
OptimisticSet(value);
}
public Object CompareAndSet(Object newValue)
{
return Interlocked.Exchange(ref _value, newValue);
}
public void OptimisticSet(Object newValue)
{
do {
} while (_value == Interlocked.CompareExchange(ref _value, _value, newValue));
}
public Object Get()
{
return _value;
}
}
我失败的尝试:
class AtomicReference<T>
{
private T _value;
public AtomicReference()
{
}
public AtomicReference(T value)
{
Set(value);
}
public T CompareAndSet(T newValue)
{
// _value is not an object that can be referenced
return Interlocked.Exchange(ref _value, newValue);
}
public void OptimisticSet(T newValue)
{
// I can't use the operator== with type T
do{}while(_value == CompareAndSet(newValue));
}
public T Get()
{
return _value;
}
}
最佳答案
您需要constrain T
是一个引用类型,像这样:
class AtomicReference<T> where T : class {
private T _value;
public AtomicReference() { }
public AtomicReference(T value) {
OptimisticSet(value);
}
public T CompareAndSet(T newValue) {
return Interlocked.Exchange(ref _value, newValue);
}
public void OptimisticSet(T newValue) {
while (_value == CompareAndSet(newValue));
}
public T Get() {
return _value;
}
}
编辑:我建议您也用属性替换方法:
public T Value {
get { return _value; }
set { while(_value == CompareAndSet(value)); }
}
关于C# 如何创建泛型类?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/1830406/