IEnumerator MainThreadLoopWithNaiveSynchronization()
{
var bounds = new Bounds(_BoundCenter, _BoundSize);
var syncRunner = new SyncRunner();
while (_breakIt == false)
{
_time = Time.time / 10;
//Since we are using the SyncRunner, we don't need to yield the execution
//as the SyncRunner is meant to stall the thread where it starts from.
//The main thread will be stuck until the multiParallelTask has been
//executed. A MultiParallelTaskCollection relies on its own
//internal threads to run, so although the Main thread is stuck
//the operation will complete
_multiParallelTasks.ThreadSafeRunOnSchedule(syncRunner);
//then it resumes here, in the main thread, copying the result to the particleDataBuffer.
//remember, multiParalleTasks is not executing anymore until the next frame!
//so the array is safe to use
_particleDataBuffer.SetData(_gpuparticleDataArr);
//render the particles. I use DrawMeshInstancedIndirect but
//there aren't any compute shaders running. This is so cool!
Graphics.DrawMeshInstancedIndirect(_pointMesh, 0, _material,
bounds, _GPUInstancingArgsBuffer);
//continue the cycle on the next frame
yield return(null);
}
//the application is shutting down. This is not that necessary in a
//standalone client, but necessary to stop the thread when the
//application is stopped in the Editor to stop all the threads.
_multiParallelTasks.ClearAndKill();
TaskRunner.Instance.StopAndCleanupAllDefaultSchedulerTasks();
}
IEnumerator UpdateIT()
{
var waitForSecondsEnumerator = new WaitForSecondsEnumerator(0.1f);
var syncRunner = new SyncRunner <Allocation0Enumerator>();
var syncRunner2 = new SyncRunner <WaitForSecondsEnumerator>();
var task = TaskRunner.Instance.AllocateNewTaskRoutine(syncRunner2).SetEnumeratorRef(ref waitForSecondsEnumerator);
var task2 = TaskRunner.Instance.AllocateNewTaskRoutine(syncRunner);
var serialtask = new SerialTaskCollection <Allocation0Enumerator>();
int counter = 0;
while (true)
{
yield return(task.Start());
//yield return new Allocation0Enumerator(counter++); //nay this allocates
yield return(task2.SetEnumerator(new Allocation0Enumerator(counter++)).Start()); //yay, this doesn't allocate!
yield return(serialtask.Add(new Allocation0Enumerator(counter))); //yay, this doesn't allocate!
serialtask.Clear();
yield return(null);
}
}
public Program2()
{
runner = new SyncRunner <ExtraLeanSveltoTask <UltraSpecializedEnumerator> >(-1);
runner2 = new SyncRunner <ExtraLeanSveltoTask <UItraSpecializedEnumeratorClass> >(-1);
runner3 = new UpdateMonoRunner <ExtraLeanSveltoTask <UltraSpecializedEnumerator> >("test");
runner4 = new UpdateMonoRunner <LeanSveltoTask <UltraSpecializedEnumerator> >("test2", 100000);
runner5 = new UpdateMonoRunner <LeanSveltoTask <IEnumerator <TaskContract> > >("test3", 100000);
}
//physicScheduler -> updateScheduler -> coroutineScheduler -> lateScheduler
static StandardSchedulers()
{
syncScheduler = new SyncRunner(false);
multiThreadScheduler = new MultiThreadRunner("MultiThreadRunner", true);
#if UNITY_5 || UNITY_5_3_OR_NEWER
coroutineScheduler = new CoroutineMonoRunner("StandardCoroutineRunner");
physicScheduler = new PhysicMonoRunner("StandardPhysicRunner");
lateScheduler = new LateMonoRunner("StandardLateRunner");
updateScheduler = new UpdateMonoRunner("StandardMonoRunner");
#endif
}
IEnumerator UpdateIT()
{
var waitForSecondsEnumerator = new WaitForSecondsEnumerator(0.1f);
var syncRunner = new SyncRunner();
while (true)
{
yield return(waitForSecondsEnumerator.RunOnSchedule(syncRunner));
yield return(null);
}
}
IEnumerator MainThreadOperations(ParticleCounter particleCounter)
{
var bounds = new Bounds(_BoundCenter, _BoundSize);
var syncRunner = new SyncRunner();
//these will help with synchronization between threads
WaitForSignalEnumerator _waitForSignal = new WaitForSignalEnumerator(() => _breakIt);
WaitForSignalEnumerator _otherwaitForSignal = new WaitForSignalEnumerator();
//Start the operations on other threads
OperationsRunningOnOtherThreads(_waitForSignal, _otherwaitForSignal)
.ThreadSafeRunOnSchedule(StandardSchedulers.multiThreadScheduler);
//start the mainloop
while (true)
{
_time = Time.time / 10;
//wait until the other thread tell us that the data is ready to be used.
//Note that I am stalling the main thread here! This is entirely up to you
//if you don't want to stall it, as you can see with the other use cases
_otherwaitForSignal.RunOnSchedule(syncRunner);
#if BENCHMARK
if (PerformanceCheker.PerformanceProfiler.showingFPSValue > 30.0f)
{
if (particleCounter.particlesLimit >= 16)
{
particleCounter.particlesLimit -= 16;
}
PerformanceCheker.PerformanceProfiler.particlesCount = particleCounter.particlesTransformed;
}
particleCounter.particlesTransformed = 0;
#endif
_particleDataBuffer.SetData(_gpuparticleDataArr);
//render the particles. I use DrawMeshInstancedIndirect but
//there aren't any compute shaders running. This is so cool!
Graphics.DrawMeshInstancedIndirect(_pointMesh, 0, _material,
bounds, _GPUInstancingArgsBuffer);
//tell to the other thread that now it can perform the operations
//for the next frame.
_waitForSignal.Signal();
//continue the cycle on the next frame
yield return(null);
}
}
//yes this is running from another thread
IEnumerator MainLoopOnOtherThread()
{
var syncRunner = new SyncRunner();
var then = DateTime.Now;
//Let's start the MainThread Loop
RenderingOnCoroutineRunner().ThreadSafeRun();
var CopyBufferOnUpdateRunner = new SimpleEnumerator(this); //let's avoid useless allocations
//let's avoid allocations inside the loop
Func <bool> onExternalBreak = OnExternalBreak;
while (_breakIt == false)
{
_time = (float)(DateTime.Now - then).TotalSeconds;
//Since we are using the SyncRunner, we don't need to yield the execution
//as the SyncRunner is meant to stall the thread where it starts from.
//The main thread will be stuck until the multiParallelTask has been
//executed. A MultiParallelTaskCollection relies on its own
//internal threads to run, so although the Main thread is stuck
//the operation will complete
_multiParallelTasks.ThreadSafeRunOnSchedule(syncRunner);
//then it resumes here, however the just computed particles
//cannot be passed to the compute buffer now,
//as the Unity methods are not thread safe
//so I have to run a simple enumerator on the main thread
var continuator = CopyBufferOnUpdateRunner.ThreadSafeRunOnSchedule(StandardSchedulers.updateScheduler);
//and I will wait it to complete, still exploting the continuation wrapper.
//continuators can break on extra conditions too;
continuator.BreakOnCondition(onExternalBreak);
//We need to wait the MainThread to finish its operation before to run the
//next iteration. So let's stall using the syncrunner;
continuator.RunOnSchedule(syncRunner);
}
//the application is shutting down. This is not that necessary in a
//standalone client, but necessary to stop the thread when the
//application is stopped in the Editor to stop all the threads.
_multiParallelTasks.ClearAndKill();
TaskRunner.Instance.StopAndCleanupAllDefaultSchedulerTasks();
yield break;
}
IEnumerator WaitForNodesAdded()
{
//Engines are usually designed to be able to cope with dynamic adding and removing of entities,
//but in this case I needed to know when the entities are ready to be processed. This wouldn't be
//strictly necessary if I coded the engine in a different way, but I decided to keep it simpler and more readable.
//That's why the engine starts immediately a task that waits for the nodes to be added(it assumes that all the
//entities are created on the same frame).This demo aims to be allocation free during the main execution, that's
//why all the tasks are prepared before hand. In this step, we prepare just one task that runs the main operations
//that must be executed on the entities.
int count = 0;
#if FOURTH_TIER_EXAMPLE
BoidNode[] _nodes;
#endif
do
{
#if FIRST_TIER_EXAMPLE || SECOND_TIER_EXAMPLE || THIRD_TIER_EXAMPLE
count = _nodes.Count;
#endif
#if FOURTH_TIER_EXAMPLE
_nodes = _structNodes.GetList(out count);
#endif
yield return(null);
} while (count == 0);
#if TURBO_EXAMPLE
int numberOfThreads = (int)Mathf.Min(NUM_OF_THREADS, count);
var countn = count / numberOfThreads;
_multiParallelTask = new MultiThreadedParallelTaskCollection(numberOfThreads, false);
_syncRunner = new SyncRunner(true);
for (int i = 0; i < numberOfThreads; i++)
{
_multiParallelTask.Add(new BoidEnumerator(_nodes, countn * i, countn));
}
#elif FIRST_TIER_EXAMPLE || SECOND_TIER_EXAMPLE || THIRD_TIER_EXAMPLE || FOURTH_TIER_EXAMPLE
_boidEnumerator = new BoidEnumerator(_nodes, 0, count);
#endif
_testEnumerator = new TestEnumerator(_printNode);
Update().ThreadSafeRunOnSchedule(StandardSchedulers.updateScheduler);
}
public void TestPooledTaskMemoryUsage()
{
var syncRunner = new SyncRunner <SlowTaskStruct>(2000);
var task = TaskRunner.Instance.AllocateNewTaskRoutine(syncRunner);
task.SetEnumerator(new SlowTaskStruct(1));
task.Start();
Assert.That(() =>
{
task.SetEnumerator(new SlowTaskStruct(1));
}, Is.Not.AllocatingGCMemory());
Assert.That(() =>
{ task.Start(); }, Is.Not.AllocatingGCMemory());
Assert.That(() =>
{ task.SetEnumerator(new SlowTaskStruct(1)); }, Is.Not.AllocatingGCMemory());
Assert.That(() =>
{ task.Start(); }, Is.Not.AllocatingGCMemory());
}
public const uint NUM_OF_THREADS = 8; //must be divisible by 4 for this exercise as I am not handling reminders
#endif
IEnumerator Update()
{
SyncRunner _syncRunner = new SyncRunner();
while (true)
{
#if TURBO_EXAMPLE
//note: yielding here is meaningless as it runs on a sync scheduler
//which will stop the execution of the thread until the operation is
//done. I just didn't want to confuse you.
//Note that while the task runs inside the Sync Runner, the
//MultiThreadedParallelTaskCollection run on several threads
//therefore main threads waits until the other threads are finished
//I know it sounds complex, but look, is very simple right?
yield return(_multiParallelTask.ThreadSafeRunOnSchedule(_syncRunner));
//try this if you want to see what happens if you don't stall the mainthread
//don't be shocked, while the demo will run at thousand of frame per second
//the operation will call _testEnumerator still at the same frequency
//it would have happened before. However this would be the way to use it
//in a normal scenarion, as you don't want the main thread to be stalled.
//yield return _multiParallelTask;
#else
//yield on the sync scheduler as I want hold the main thread on purpose.
//In real life you wouldn't use sync scheduler as you don't want to
//stall the main thread.
//note: RunOnSchedule (and ThreadSafeRunOnSchedule) allows to continue
//the operation on another runner without stalling the current one.
//yielding it allows the current operation to wait for the result.
yield return(_boidEnumerator.RunOnScheduler(_syncRunner));
#endif
//run the cached enumerator on the next coroutine phase, yield until it's done.
//The thread will spin until is done. Yielding an enumerator on the same
//runner actually executes it immediatly.
yield return(_testEnumerator);
//since _testEnumerator runs synchronously, we need to yield for a frame
//at least once, otherwise this enumerator becomes totally synchronously
//transforming into an infinite loop.
//I understand this can look all obscure if you don't know how yield works :(
yield return(null);
}
}
IEnumerator OperationsRunningOnOtherThreads(WaitForSignalEnumerator waitForSignal,
WaitForSignalEnumerator otherWaitForSignal)
{
//a SyncRunner stop the execution of the thread until the task is not completed
//the parameter true means that the runner will sleep in between yields
var syncRunner = new SyncRunner();
while (_breakIt == false)
{
//execute the tasks. The MultiParallelTask is a special collection
//that uses N threads on its own to execute the tasks. This thread
//doesn't need to do anything else meanwhile and will yield until
//is done. That's why the syncrunner can sleep between yields, so
//that this thread won't take much CPU just to wait the parallel
//tasks to finish
_multiParallelTasks.ThreadSafeRunOnSchedule(syncRunner);
#if BENCHMARK //do it x4
_multiParallelTasks.ThreadSafeRunOnSchedule(syncRunner);
_multiParallelTasks.ThreadSafeRunOnSchedule(syncRunner);
_multiParallelTasks.ThreadSafeRunOnSchedule(syncRunner);
#endif
//the 1 Million particles operation are done, let's signal that the
//result can now be used
otherWaitForSignal.Signal();
//wait until the application is over or the main thread will tell
//us that now we can perform again the particles operation. This
//is an explicit while instead of a yield, just because if the _breakIt
//condition, which is needed only because if this application runs
//in the editor, the threads spawned will not stop until the Editor is
//shut down.
waitForSignal.RunOnSchedule(syncRunner);
}
//the application is shutting down. This is not that necessary in a
//standalone client, but necessary to stop the thread when the
//application is stopped in the Editor to stop all the threads.
_multiParallelTasks.ClearAndKill();
TaskRunner.Instance.StopAndCleanupAllDefaultSchedulerTasks();
yield break;
}