/// <summary>
/// Get current value
/// </summary>
public async Task <T> GetValue()
{
switch (mode)
{
case LazyThreadSafetyMode.PublicationOnly:
{
var current = valueReference;
if (IsNotNullOrExpired(current))
{
return(current.Value);
}
var newValue = await valueGenerator();
lock (lockObj)
{
valueReference = new ValueAndExpires <T>(newValue);
return(valueReference.Value);
}
}
case LazyThreadSafetyMode.None:
{
var current = valueReference;
if (IsNotNullOrExpired(current))
{
return(current.Value);
}
current = new ValueAndExpires <T>(await valueGenerator());
valueReference = current;
return(valueReference.Value);
}
default:
throw new Exception(mode.ToString());
}
}
private bool IsNotNullOrExpired(ValueAndExpires <T> current)
{
return(current != null && current.Expires > now());
}
