/// <inheritdoc />
public async Task <IPinnedValue <TKey, TValue> > GetPinAsync(TKey key, TState state)
{
IAsyncCacheContracts.GetPinAsync(this, key);
while (true)
{
try
{
var entry = await this.entries.GetOrAddLazyAsync(
key, pinKey => this.CreateCacheEntryAsync(pinKey, state)).DontMarshallContext();
IPinnedValue <TKey, TValue> pin;
if (entry.TryPin(out pin))
{
// if pin was successful return the pin, otherwise loop back and try again
// (pinning can fail if the cache entry is being disposed by another thread)
return(pin);
}
}
catch (Exception)
{
// if creating the cache value threw an exception remove it from the dictionary
// otherwise exceptions could slowly fill in the cache, aka memory leak
this.entries.TryRemove(key);
throw;
}
}
}
/// <inheritdoc />
public async Task <IPinnedValue <TKey, TChunk> > GetPinAsync(TKey key)
{
IAsyncCacheContracts.GetPinAsync(this, key);
if (this.isInBounds(key))
{
return(await this.cache.GetPinAsync(key).DontMarshallContext());
}
else
{
return(new FakePin(key, this.outOfBounds.Create(key)));
}
}
/// <inheritdoc />
public Task <IPinnedValue <TKey, TValue> > GetPinAsync(TKey key)
{
IAsyncCacheContracts.GetPinAsync(this, key);
return(this.cache.GetPinAsync(key, default(VoidStruct)));
}