/// <summary>
/// Enqueue a master job. A master job requires exclusive access to all chunks.
/// </summary>
/// <param name="work">The work to be executed by the job.</param>
/// <param name="reserveQueue">Evaluates whether the job can be enqueued. If so, the master queue is reserved
/// to indicate that this job is currently queued or executing.</param>
/// <param name="unreserveQueue">Un-reserve the master queue to indicate that this job is no longer queued or
/// executing.</param>
/// <param name="canSkip">Indicates whether the job can be skipped.</param>
/// <returns>True if the job was enqueued.</returns>
public bool EnqueueMaster(
Action work,
Predicate<MasterJobQueue> reserveQueue,
Action<MasterJobQueue> unreserveQueue,
bool canSkip)
{
// Create the job
var job = new MasterJob(work, unreserveQueue, canSkip, this.chunkQueues.Count + 10);
job.IsPendingChanged += this.Job_IsPendingChanged;
job.Completed += this.Job_Completed;
// Enqueue the job if it can be reserved
this.queuesLock.Enter();
try
{
// Reserve the master queue
if (!reserveQueue(this.masterQueue))
{
return false;
}
// Build the set of owners
int i = 0;
ChunkJobQueue[] chunkQueues = new ChunkJobQueue[this.chunkQueues.Count];
foreach (ChunkJobQueue queue in this.chunkQueues.Values)
{
chunkQueues[i++] = queue;
}
// Add the owners and enqueue the job
job.AddOwners(this.masterQueue);
job.AddOwners(chunkQueues);
this.masterQueue.Enqueue(job);
foreach (ChunkJobQueue queue in chunkQueues)
{
queue.Enqueue(job);
}
// Retain a reference to this master job
this.masterQueueJobs.Add(job);
}
finally
{
this.queuesLock.Exit();
}
return true;
}
/// <summary>
/// Initialise the job queue for the given chunk.
/// </summary>
/// <param name="chunk">The chunk.</param>
/// <returns>The job queue.</returns>
private ChunkJobQueue InitialiseQueue(Vector2I chunk)
{
var queue = new ChunkJobQueue(chunk, this.masterQueueJobs);
queue.Idle += this.ChunkJobs_QueueIdle;
this.chunkQueues.Add(chunk, queue);
return queue;
}
/// <summary>
/// Enqueue a job which requires exclusive access to one or more chunks. This must be called between
/// BeginEnqueueChunks and EndEnqueueChunks.
/// </summary>
/// <param name="work">The work to be executed by the job.</param>
/// <param name="reserveQueue">Reserve each queue to indicate that this job is currently queued or executing.
/// </param>
/// <param name="unreserveQueue">Un-reserve each queue to indicate that this job is no longer queued or
/// executing.</param>
/// <param name="canSkip">Indicates whether the job can be skipped.</param>
/// <param name="chunks">The chunks to which this job requires exclusive access.</param>
public void EnqueueChunks(
Action work,
Action<ChunkJobQueue> reserveQueue,
Action<ChunkJobQueue> unreserveQueue,
bool canSkip,
Vector2I[] chunks)
{
// Create the job
var job = new ChunkJob(work, unreserveQueue, canSkip, chunks.Length);
job.IsPendingChanged += this.Job_IsPendingChanged;
job.Completed += this.Job_Completed;
// Build the set of owners, checking whether the job can be enqueued
ChunkJobQueue[] chunkQueues = new ChunkJobQueue[chunks.Length];
for (int i = 0; i < chunks.Length; i++)
{
chunkQueues[i] = this.GetOrInitialiseQueue(chunks[i]);
}
// Reserve the owner queues
foreach (ChunkJobQueue queue in chunkQueues)
{
reserveQueue(queue);
}
// Add the owners and enqueue the job
job.AddOwners(chunkQueues);
foreach (ChunkJobQueue queue in chunkQueues)
{
queue.Enqueue(job);
}
}
