/// <summary>
/// Initializes a new instance of the <see cref="Hashtable<Key, Data>"/> class.
/// </summary>
/// <param name="initialCapacity">The initial capacity of the table.</param>
public Hashtable(int initialCapacity)
{
if (initialCapacity < 1)
{
throw new ArgumentOutOfRangeException("initialCapacity", "cannot be < 1");
}
array = new Hashtable <TKey, TData> .Node[initialCapacity];
writeLock = new OneManyLock();
}
public static void Go()
{
Int32 x = 0;
const Int32 iterations = 10000000; // 10 million
// How long does it take to increment x 10 million times
// adding the overhead of calling an uncontended SimpleHybridLock?
var shl = new SimpleHybridLock();
shl.Enter(); x++; shl.Leave();
Stopwatch sw = Stopwatch.StartNew();
for (Int32 i = 0; i < iterations; i++)
{
shl.Enter(); x++; shl.Leave();
}
Console.WriteLine("Incrementing x in SimpleHybridLock: {0:N0}", sw.ElapsedMilliseconds);
// How long does it take to increment x 10 million times
// adding the overhead of calling an uncontended ANotherHybridLock?
using (var ahl = new AnotherHybridLock()) {
ahl.Enter(); x++; ahl.Leave();
sw.Restart();
for (Int32 i = 0; i < iterations; i++)
{
ahl.Enter(); x++; ahl.Leave();
}
Console.WriteLine("Incrementing x in AnotherHybridLock: {0:N0}", sw.ElapsedMilliseconds);
}
using (var oml = new OneManyLock()) {
oml.Enter(true); x++; oml.Leave();
sw.Restart();
for (Int32 i = 0; i < iterations; i++)
{
oml.Enter(true); x++; oml.Leave();
}
Console.WriteLine("Incrementing x in OneManyLock: {0:N0}", sw.ElapsedMilliseconds);
}
using (var rwls = new ReaderWriterLockSlim(LockRecursionPolicy.NoRecursion)) {
rwls.EnterReadLock(); x++; rwls.ExitReadLock();
sw.Restart();
for (Int32 i = 0; i < iterations; i++)
{
rwls.EnterReadLock(); x++; rwls.ExitReadLock();
}
Console.WriteLine("Incrementing x in ReaderWriterLockSlim: {0:N0}", sw.ElapsedMilliseconds);
}
var rwl = new ReaderWriterLock();
rwl.AcquireReaderLock(Timeout.Infinite); x++; rwl.ReleaseReaderLock();
sw.Restart();
for (Int32 i = 0; i < iterations; i++)
{
rwl.AcquireReaderLock(Timeout.Infinite); x++; rwl.ReleaseReaderLock();
}
Console.WriteLine("Incrementing x in ReaderWriterLock: {0:N0}", sw.ElapsedMilliseconds);
Object l = new Object();
Monitor.Enter(l); x++; Monitor.Exit(l);
sw.Restart();
for (Int32 i = 0; i < iterations; i++)
{
Monitor.Enter(l); x++; Monitor.Exit(l);
}
Console.WriteLine("Incrementing x in Monitor: {0:N0}", sw.ElapsedMilliseconds);
sw.Restart();
for (Int32 i = 0; i < iterations; i++)
{
lock (l) { x++; }
}
Console.WriteLine("Incrementing x in lock: {0:N0}", sw.ElapsedMilliseconds);
Console.ReadLine();
}