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ThreadLocal.cs
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60 lines (51 loc) · 1.3 KB
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using System;
using System.Collections.Generic;
namespace System.Threading
{
public class ThreadLocal<T>
{
Func<T> _factory;
Dictionary<int, T> _cache = new Dictionary<int,T>();
public ThreadLocal() : this(() => default(T))
{
}
public ThreadLocal(Func<T> valueFactory)
{
_factory = valueFactory;
}
public T Value {
get {
lock(_cache) {
int key = Thread.CurrentThread.ManagedThreadId;
if (_cache.ContainsKey(key)) {
return _cache[key];
}
return (_cache[key] = _factory());
}
}
set {
lock(_cache) {
int key = Thread.CurrentThread.ManagedThreadId;
_cache[key] = value;
}
}
}
}
}
#if WINDOWS_PHONE || DOTNETISOLDANDSAD
namespace System.Concurrency
{
public class Lazy<T>
{
public Lazy(Func<T> ValueFetcher)
{
_Value = ValueFetcher();
}
T _Value;
T Value {
get { return _Value; }
}
}
}
#endif
// vim: tw=120 ts=4 sw=4 et :