public void Write <T>(T[] instances, Action <T> write)
{
RMonitor.Enter(_writersMutex);
try
{
var index = RInterlocked.Read(ref _index);
var nextIndex = Toggle(index);
if (WaitOnFirstWrite)
{
WaitWhileOccupied(_readIndicator[nextIndex]); // Now we're subject to starvation by (new) readers.
} // And mutual exclusion may still be violated.
_snoop.BeginWrite(nextIndex);
write(instances[nextIndex]);
_snoop.EndWrite(nextIndex);
// Move subsequent readers to 'next' instance
RInterlocked.Exchange(ref _index, nextIndex);
// Wait for all readers to finish reading the instance we want to write next
WaitWhileOccupied(_readIndicator[index]);
// At this point there may be readers, but they must be on nextReadIndex, we can
// safely write.
_snoop.BeginWrite(index);
write(instances[index]);
_snoop.EndWrite(index);
}
finally
{
RMonitor.Exit(_writersMutex);
}
}
public void Write <T>(T[] instances, Action <T> write)
{
RMonitor.Enter(_writersMutex);
try
{
// var readIndex = RUnordered.Read(ref _readIndex);
var readIndex = RInterlocked.Read(ref _readIndex);
var nextReadIndex = Toggle(readIndex);
_snoop.BeginWrite(nextReadIndex);
write(instances[nextReadIndex]);
_snoop.EndWrite(nextReadIndex);
// Move subsequent readers to 'next' instance
RInterlocked.Exchange(ref _readIndex, nextReadIndex);
// Wait for all readers marked in the 'next' read indicator,
// these readers could be reading the 'readIndex' instance
// we want to write next
var versionIndex = RInterlocked.Read(ref _versionIndex);
//var versionIndex = RUnordered.Read(ref _versionIndex);
var nextVersionIndex = Toggle(versionIndex);
WaitWhileOccupied(_readIndicator[nextVersionIndex]);
// Move subsequent readers to the 'next' read indicator
RInterlocked.Exchange(ref _versionIndex, nextVersionIndex);
// RUnordered.Write(ref _versionIndex, nextVersionIndex);
// At this point all subsequent readers will read the 'next' instance
// and mark the 'nextVersionIndex' read indicator, so the only remaining potential
// readers are the ones on the 'versionIndex' read indicator, so wait for them to finish
WaitWhileOccupied(_readIndicator[versionIndex]);
// At this point there may be readers, but they must be on nextReadIndex, we can
// safely write.
_snoop.BeginWrite(readIndex);
write(instances[readIndex]);
_snoop.EndWrite(readIndex);
}
finally
{
RMonitor.Exit(_writersMutex);
}
}
public void Write <T>(T[] instances, Action <T> write)
{
RMonitor.Enter(_writersMutex);
try
{
var readIndex = RInterlocked.Read(ref _readIndex);
var nextReadIndex = Toggle(readIndex);
_snoop.BeginWrite(nextReadIndex);
write(instances[nextReadIndex]);
_snoop.EndWrite(nextReadIndex);
RInterlocked.Exchange(ref _readIndex, nextReadIndex);
WaitWhileOccupied(_readIndicator);
_snoop.BeginWrite(readIndex);
write(instances[readIndex]);
_snoop.EndWrite(readIndex);
}
finally
{
RMonitor.Exit(_writersMutex);
}
}
