/// <summary>Queues a task to the scheduler.</summary>
/// <param name="task">The task to be scheduled.</param>
protected override void QueueTask(Task task)
{
// Make sure the pool is started, e.g. that all threads have been created.
m_threads.Force();
// If the task is marked as long-running, give it its own dedicated thread
// rather than queueing it.
if ((task.CreationOptions & TaskCreationOptions.LongRunning) != 0)
{
new Thread(state => base.TryExecuteTask((Task)state))
{
IsBackground = true
}.Start(task);
}
else
{
// Otherwise, insert the work item into a queue, possibly waking a thread.
// If there's a local queue and the task does not prefer to be in the global queue,
// add it to the local queue.
WorkStealingQueue <Task> wsq = m_wsq;
if (wsq != null && ((task.CreationOptions & TaskCreationOptions.PreferFairness) == 0))
{
// Add to the local queue and notify any waiting threads that work is available.
// Races may occur which result in missed event notifications, but they're benign in that
// this thread will eventually pick up the work item anyway, as will other threads when another
// work item notification is received.
wsq.LocalPush(task);
if (m_threadsWaiting > 0) // OK to read lock-free.
{
lock (m_queue) { Monitor.Pulse(m_queue); }
}
}
// Otherwise, add the work item to the global queue
else
{
lock (m_queue)
{
m_queue.Enqueue(task);
if (m_threadsWaiting > 0)
{
Monitor.Pulse(m_queue);
}
}
}
}
}
/// <summary>Queues a task to the scheduler.</summary>
/// <param name="task">The task to be scheduled.</param>
protected override void QueueTask(Task task)
{
this.m_threads.Force <Thread[]>();
if ((task.CreationOptions & TaskCreationOptions.LongRunning) != TaskCreationOptions.None)
{
new Thread(delegate(object state)
{
base.TryExecuteTask((Task)state);
})
{
IsBackground = true
}.Start(task);
return;
}
WorkStealingQueue <Task> wsq = WorkStealingTaskScheduler.m_wsq;
if (wsq != null && (task.CreationOptions & TaskCreationOptions.PreferFairness) == TaskCreationOptions.None)
{
wsq.LocalPush(task);
if (this.m_threadsWaiting <= 0)
{
return;
}
lock (this.m_queue)
{
Monitor.Pulse(this.m_queue);
return;
}
}
lock (this.m_queue)
{
this.m_queue.Enqueue(task);
if (this.m_threadsWaiting > 0)
{
Monitor.Pulse(this.m_queue);
}
}
}
