public void TestListWriter()
{
GatewayLock gate = new GatewayLock();
for ( int iteration = 0; iteration < 100; iteration++ )
{
var list = new List<Entry>();
Parallel.For( 0, 1000, (int i) =>
{
Random r = new Random();
for ( int j = 0; j < 100; j++ )
{
var num = r.Next( 10 );
bool found = false;
gate.PassThrough( () =>
{
foreach ( var entry in list )
{
if ( entry.Number == num )
{
lock ( entry )
{
entry.TimeFound++;
found = true;
return;
}
}
}
} );
if ( !found )
{
gate.Lock( () =>
{
foreach ( var entry in list )
{
if ( entry.Number == num )
{
entry.TimeFound++;
found = true;
return;
}
}
list.Add( new Entry() { Number = num, TimeFound = 1 } );
} );
}
}
} );
Assert.IsTrue( list.Count <= 10 );
}
}
public void TestWriterLock()
{
GatewayLock gate = new GatewayLock();
Stopwatch watch = new Stopwatch();
watch.Start();
long inPassThrough = 0;
long finishedPassThrough = 0;
long inLock = 0;
Task secondaryTask = null;
var mainTask = Task.Factory.StartNew(
() =>
{
gate.PassThrough(
() =>
{
inPassThrough = watch.ElapsedMilliseconds;
secondaryTask = Task.Factory.StartNew(
() =>
{
gate.Lock(
() =>
{
// chill
inLock = watch.ElapsedMilliseconds;
} );
} );
Thread.Sleep( 100 );
finishedPassThrough = watch.ElapsedMilliseconds;
} );
} );
mainTask.Wait();
secondaryTask.Wait();
watch.Stop();
Assert.IsTrue( inLock >= finishedPassThrough );
}
public void TestWriterHoldThenReaders()
{
GatewayLock gate = new GatewayLock();
Stopwatch watch = new Stopwatch();
watch.Start();
bool writerDone = false;
bool anyFails = false;
Task main = Task.Factory.StartNew(
() =>
{
var ourTasks = new Task[10];
gate.Lock( () =>
{
for ( int i = 0; i < ourTasks.Length; i++ )
{
ourTasks[i] = Task.Factory.StartNew(
() =>
{
gate.PassThrough( () =>
{
if ( !writerDone )
{
anyFails = true;
}
} );
} );
}
Thread.Sleep( 1000 );
writerDone = true;
} );
Task.WaitAll( ourTasks );
} );
main.Wait();
Thread.MemoryBarrier();
Assert.IsFalse( anyFails );
}
