// Accessed only by the thread:
private static void ThreadWorker()
{
while (true)
{
if (HasFileInQueue())
{
try {
currentChange.Apply(fileDatabases);
}
catch (Exception e) {
Debug.LogError("Async file change error: " + e);
}
ClearCurrent();
}
else
{
QueuedFileChange work = TryToGetNext();
if (work != null)
{
ChangeCurrent(work);
}
else
{
lock (workPulsePadlock) {
Monitor.Wait(workPulsePadlock);
}
}
}
}
}
public static void InitThreadPool()
{
workPulsePadlock = new object();
currentChange = null;
changeQueueLock = new object();
changeQueue = new Queue <QueuedFileChange>(100); // Arbitrary starting size - just so long as some capacity is expected
shutdown = false;
thread = new Thread(new ThreadStart(ThreadWorker));
thread.Start();
}
public static void Push(QueuedFileChange change)
{
lock (changeQueueLock) {
bool doPulse = changeQueue.Count == 0;
changeQueue.Enqueue(change);
if (doPulse)
{
lock (workPulsePadlock) {
Monitor.Pulse(workPulsePadlock);
}
}
}
}
private static QueuedFileChange TryToGetNext()
{
QueuedFileChange work = null;
lock (changeQueueLock) {
while (work == null && changeQueue.Count > 0)
{
work = changeQueue.Dequeue();
// If we're shutting down, throw away any queued loading work
if (shutdown == true)
{
if (work.GetType() == typeof(QueuedFileLoad))
{
work = null;
}
}
}
}
return(work);
}
private static void ClearCurrent()
{
currentChange = null;
}
private static void ChangeCurrent(QueuedFileChange work)
{
currentChange = work;
}