public void WriteBytes(byte[] bytes)
{
if (_isOpen)
{
if (bytes.Length > _sharedBuf.Length)
{
Resize(bytes.Length);
}
_sharedBuf.Write(bytes);
}
}
public void Write_NullArray_ThrowsException()
{
var name = Guid.NewGuid().ToString();
using (var sma = new SharedArray <int>(name, 10))
{
bool exceptionThrown = false;
try
{
sma.Write(null);
}
catch (ArgumentNullException)
{
exceptionThrown = true;
}
Assert.IsTrue(exceptionThrown, "null buffer should result in ArgumentNullException");
}
}
public void GetEnumerator_IterateItems_DataMatches()
{
var name = Guid.NewGuid().ToString();
Random r = new Random();
int bufSize = 1024;
byte[] data = new byte[bufSize];
byte[] readBuf = new byte[bufSize];
using (var sma = new SharedArray <byte>(name, bufSize))
{
sma.Write(data);
int value = 0;
foreach (var item in sma)
{
Assert.AreEqual(data[value], item);
value++;
}
}
}
public void AcquireWriteLock_ReadWrite_LocksCorrectly()
{
var name = Guid.NewGuid().ToString();
Random r = new Random();
int bufSize = 1024;
byte[] data = new byte[bufSize];
byte[] readBuf = new byte[bufSize];
bool readIsFirst = false;
bool readBlocked = false;
int syncValue = 0;
// Fill with random data
r.NextBytes(data);
using (var sma = new SharedArray <byte>(name, bufSize))
{
// Acquire write lock early
sma.AcquireWriteLock();
using (var smr = new SharedArray <byte>(name))
{
var t1 = Task.Factory.StartNew(() =>
{
if (System.Threading.Interlocked.Exchange(ref syncValue, 1) == 0)
{
readIsFirst = true;
}
// Should block until write lock is released
smr.AcquireReadLock();
if (System.Threading.Interlocked.Exchange(ref syncValue, 3) == 4)
{
readBlocked = true;
}
smr.CopyTo(readBuf);
smr.ReleaseReadLock();
});
System.Threading.Thread.Sleep(10);
var t2 = Task.Factory.StartNew(() =>
{
var val = System.Threading.Interlocked.Exchange(ref syncValue, 2);
if (val == 0)
{
readIsFirst = false;
}
else if (val == 3)
{
readBlocked = false;
}
System.Threading.Thread.Sleep(10);
sma.Write(data);
System.Threading.Interlocked.Exchange(ref syncValue, 4);
sma.ReleaseWriteLock();
});
Task.WaitAll(t1, t2);
Assert.IsTrue(readIsFirst, "The read thread did not enter first.");
Assert.IsTrue(readBlocked, "The read thread did not block.");
// Check data was written before read
for (var i = 0; i < readBuf.Length; i++)
{
Assert.AreEqual(data[i], readBuf[i]);
}
}
}
}