public async Task ReleaseAsync(T stream, AsyncOperationInfo operationInfo)
{
using (await _semaphore.AcquireAsync(operationInfo))
{
_objects.First(si => object.ReferenceEquals(si.Object, stream)).IsInUse = false;
}
}
public async Task <T> InstantiateWithoutRegistering(AsyncOperationInfo operationInfo)
{
using (await _semaphore.AcquireAsync(operationInfo))
{
return(await _factory());
}
}
public async Task <T> AquireAsync(AsyncOperationInfo operationInfo)
{
ObjectInfo objectToken = null;
do
{
operationInfo.CancellationToken.ThrowIfCancellationRequested();
objectToken = await tryAquireObjectAsync();
}while (objectToken == null);
return(objectToken.Object); /////////////////////////////////////
async Task <ObjectInfo> tryAquireObjectAsync()
{
using (await _semaphore.AcquireAsync(operationInfo))
{
await populateIfAppropriateAsync();
return(tryAcquire());
}
/////////////////////////////////////
async Task populateIfAppropriateAsync()
{
var canInstantiateNew = _maxPoolSize > _objects.Count;
var haveSpareObject = _objects.Any(s => !s.IsInUse);
if (!haveSpareObject && canInstantiateNew)
{
_objects.Add(new ObjectInfo()
{
IsInUse = false,
Object = await _factory()
});
}
}
ObjectInfo tryAcquire()
{
foreach (var objectInfo in _objects)
{
if (!objectInfo.IsInUse)
{
objectInfo.IsInUse = true;
return(objectInfo);
}
}
return(null);
}
}
}
