public TValue GetOrCreate <TUserData> (TKey key, TUserData userData, CreatorFunction <TUserData> creator)
{
bool createSuccess = false;
while (true)
{
bool waitFailed = TryWaitForConstruction(key);
TValue result;
if (Storage.TryGetValue(key, out result))
{
return(result);
}
else if (waitFailed)
{
throw new ObjectDisposedException("Cache", "The cache was cleared or disposed.");
}
else if (createSuccess)
{
throw new ThreadStateException("Failed to retrieve cache element after creating it");
}
createSuccess |= TryCreate(key, userData, creator);
}
}
public bool TryCreate <TUserData> (TKey key, TUserData userData, CreatorFunction <TUserData> creator, Predicate <TValue> shouldAdd = null)
{
ConstructionState state;
if (TryCreateSetup(key, out state))
{
try {
var result = creator(key, userData);
if ((shouldAdd == null) || shouldAdd(result))
{
if (!Storage.TryAdd(key, result))
{
throw new InvalidOperationException("Cache entry was created by someone else while construction lock was held");
}
return(true);
}
else
{
return(false);
}
} finally {
TryCreateTeardown(key, state);
}
}
return(false);
}
public TValue GetOrCreate(TKey key, CreatorFunction creator)
{
while (true)
{
bool waitFailed = TryWaitForConstruction(key);
TValue result;
if (Storage.TryGetValue(key, out result))
{
return(result);
}
else if (waitFailed)
{
throw new ObjectDisposedException("Cache", "The cache was cleared or disposed.");
}
TryCreate(key, creator);
}
}
public bool TryCreate(TKey key, CreatorFunction creator)
{
ConstructionState state;
if (TryCreateSetup(key, out state))
{
try {
var result = creator(key);
if (!Storage.TryAdd(key, result))
{
throw new InvalidOperationException("Cache entry was created by someone else while construction lock was held");
}
return(true);
} finally {
TryCreateTeardown(key, state);
}
}
return(false);
}