public Cache(Func <T, R> function, int maxCapacity, bool cacheError)
{
_function = args =>
{
var weakArgs = WeakReferenceExtensions.Create(args);
#if DEBUG
var invokeDuration = default(TimeSpan);
Interlocked.Increment(ref _invocationCount);
#endif
Trim();
var res = default(ILruCacheEntry <WeakReference <T>, R>);
try
{
#if DEBUG
var swInvoke = Stopwatch.StartNew();
#endif
var value = function(args);
#if DEBUG
invokeDuration = swInvoke.Elapsed;
#endif
res = new LruValueCacheEntry <WeakReference <T>, R>(weakArgs, value);
}
catch (Exception ex) when(_cacheError)
{
res = new LruErrorCacheEntry <WeakReference <T>, R>(weakArgs, ex);
}
Interlocked.Increment(ref _count);
#if DEBUG
res.GetMetrics().InvokeDuration = invokeDuration;
#endif
return(res);
};
_cache = new WeakCacheDictionary <T, ILruCacheEntry <WeakReference <T>, R> >();
_lock = new ReaderWriterLockSlim(LockRecursionPolicy.NoRecursion);
_maxCapacity = maxCapacity;
_cacheError = cacheError;
}
public Cache(Func <T, R> function, int maxCapacity, IEqualityComparer <T> comparer, bool cacheError)
{
_function = args =>
{
#if DEBUG
var invokeDuration = default(TimeSpan);
_invocationCount++;
#endif
Trim();
var res = default(ILruCacheEntry <T, R>);
try
{
#if DEBUG
var swInvoke = Stopwatch.StartNew();
#endif
var value = function(args);
#if DEBUG
invokeDuration = swInvoke.Elapsed;
#endif
res = new LruValueCacheEntry <T, R>(args, value);
}
catch (Exception ex) when(_cacheError)
{
res = new LruErrorCacheEntry <T, R>(args, ex);
}
#if DEBUG
res.GetMetrics().InvokeDuration = invokeDuration;
#endif
return(res);
};
_cache = new CacheDictionary <T, ILruCacheEntry <T, R> >(comparer);
_maxCapacity = maxCapacity;
_cacheError = cacheError;
}