#if NET_4_0
// ManuelResetEventSlim.cs
//
// Copyright (c) 2008 Jrmie "Garuma" Laval
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//
//
using System;
using System.Diagnostics;
namespace System.Threading{
public class ManualResetEventSlim : IDisposable
{
const int isSet = 1;
const int isNotSet = 0;
const int defaultSpinCount = 20;
int state;
readonly int spinCount;
ManualResetEvent handle;
public ManualResetEventSlim () : this(false, defaultSpinCount)
{
}
public ManualResetEventSlim (bool initState) : this (initState, defaultSpinCount)
{
}
public ManualResetEventSlim (bool initState, int spinCount)
{
if (spinCount < 0)
throw new ArgumentOutOfRangeException ("spinCount is less than 0", "spinCount");
this.state = initState ? isSet : isNotSet;
this.spinCount = spinCount;
this.handle = new ManualResetEvent (initState);
}
public bool IsSet {
get {
return state == isSet;
}
}
public int SpinCount {
get {
return spinCount;
}
}
public void Reset ()
{
Interlocked.Exchange (ref state, isNotSet);
}
public void Set ()
{
Interlocked.Exchange (ref state, isSet);
}
public void Wait ()
{
Wait (CancellationToken.None);
}
public bool Wait (int millisecondsTimeout)
{
return Wait (millisecondsTimeout, CancellationToken.None);
}
public bool Wait (TimeSpan ts)
{
return Wait ((int)ts.TotalMilliseconds, CancellationToken.None);
}
public void Wait (CancellationToken token)
{
Wait (-1, token);
}
public bool Wait (int millisecondsTimeout, CancellationToken token)
{
if (millisecondsTimeout < -1)
throw new ArgumentOutOfRangeException ("millisecondsTimeout",
"millisecondsTimeout is a negative number other than -1");
Watch s = Watch.StartNew ();
SpinWait sw = new SpinWait ();
int count = 0;
while (state == isNotSet) {
if (token.IsCancellationRequested)
return false;
if (millisecondsTimeout > -1 && s.ElapsedMilliseconds > millisecondsTimeout)
return false;
if (count < spinCount) {
sw.SpinOnce ();
count++;
} else {
Thread.Sleep (0);
}
}
return true;
}
public bool Wait (TimeSpan ts, CancellationToken token)
{
return Wait ((int)ts.TotalMilliseconds, token);
}
public WaitHandle WaitHandle {
get {
return handle;
}
}
#region IDisposable implementation
public void Dispose ()
{
Dispose(true);
}
protected virtual void Dispose(bool managedRes)
{
}
#endregion
}
}
#endif
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