public bool Success(Tval val, TimeSpan outdated_ttl, out ProCacheEntry <Tval> entry)
{
entry = _entry;
if (_completion is null)
{
entry.Reset(val, outdated_ttl);
return(true);
}
_completion.SetResult(val);
entry.Reset(val, null);
return(false);
}
public bool Empty(TimeSpan outdated_ttl, out ProCacheEntry <Tval> entry)
{
entry = _entry;
if (_completion is null)
{
entry.Reset(outdated_ttl);
return(true);
}
entry.Reset(null);
_completion.SetResult(default(Tval));
return(false);
}
private async ValueTask <Tval> UpdateAsync(Tkey key, ProCacheEntry <Tval> entry, object state, CancellationToken cancellation)
{
try
{
var res = await _get(key, state, cancellation).ConfigureAwait(false);
entry.Reset(res, _outdateTtl);
_cache.Set(key, entry, _expireTtl);
return(res);
}
catch
{
entry.Reset();
throw;
}
}
public bool Success(Tval val, TimeSpan outdated_ttl, out ProCacheEntry <Tval> entry)
{
switch (_state)
{
case ResultState.Add:
((TaskCompletionSource <(bool, Tval)>)_completion).SetResult((true, val));
entry = null;
return(false);
case ResultState.Outdate:
entry = (ProCacheEntry <Tval>)_completion;
entry.Reset(val, outdated_ttl);
return(true);
}
throw new NotImplementedException();
}
private ValueTask <Tval> Add(Tkey key, object state, CancellationToken cancellation)
{
TaskCompletionSource <(bool, Tval)> completion;
lock (ProCache <Tkey> .GetLock(key.GetHashCode()))
{
if (_cache.TryGet(key, out var res))
{
return(((ProCacheEntry <Tval>)res).GetValue());
}
completion = new TaskCompletionSource <(bool, Tval)>();
var entry = new ProCacheEntry <Tval>(completion.Task, _outdateTtl);
_cache.Set(key, entry, _expireTtl);
}
return(AddAsync(key, completion, state, cancellation));
}
public Result(ProCacheEntry <Tval> cache_entry)
{
_state = ResultState.Outdate;
_completion = cache_entry;
}
public Result(ProCacheEntry <Tval> entry, TaskCompletionSource <Tval> completion = null)
{
_entry = entry;
_completion = completion;
}