Esempio n. 1
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        private void EventConsumer()
        {
            while (!Disposed)
            {
                CounterQueueEvent evt = null;
                lock (_lock)
                {
                    if (_events.Count > 0)
                    {
                        evt = _events.Dequeue();
                    }
                }

                if (evt == null)
                {
                    _queuedEvent.WaitOne(); // No more events to go through, wait for more.
                }
                else
                {
                    // Spin-wait rather than sleeping if there are any waiters, by passing null instead of the wake signal.
                    evt.TryConsume(ref _accumulatedCounter, true, _waiterCount == 0 ? _wakeSignal : null);
                }

                if (_waiterCount > 0)
                {
                    _eventConsumed.Set();
                }
            }
        }
Esempio n. 2
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        public void Dispose()
        {
            lock (_lock)
            {
                while (_events.Count > 0)
                {
                    CounterQueueEvent evt = _events.Dequeue();

                    evt.Dispose();
                }

                Disposed = true;
            }

            _queuedEvent.Set();

            _consumerThread.Join();

            foreach (BufferedQuery query in _queryPool)
            {
                query.Dispose();
            }

            _queuedEvent.Dispose();
            _wakeSignal.Dispose();
            _eventConsumed.Dispose();
        }
Esempio n. 3
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        public CounterQueueEvent QueueReport(EventHandler <ulong> resultHandler, ulong lastDrawIndex)
        {
            CounterQueueEvent result;
            ulong             draws = lastDrawIndex - _current.DrawIndex;

            lock (_lock)
            {
                // A query's result only matters if more than one draw was performed during it.
                // Otherwise, dummy it out and return 0 immediately.

                if (draws > 0)
                {
                    _current.Complete(true);
                    _events.Enqueue(_current);

                    _current.OnResult += resultHandler;
                }
                else
                {
                    _current.Complete(false);
                    _current.Dispose();
                    resultHandler(_current, 0);
                }

                result = _current;

                _current = new CounterQueueEvent(this, GetTarget(Type), lastDrawIndex);
            }

            _queuedEvent.Set();

            return(result);
        }
Esempio n. 4
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        public CounterQueueEvent QueueReport(EventHandler <ulong> resultHandler, ulong lastDrawIndex, bool hostReserved)
        {
            CounterQueueEvent result;
            ulong             draws = lastDrawIndex - _current.DrawIndex;

            lock (_lock)
            {
                // A query's result only matters if more than one draw was performed during it.
                // Otherwise, dummy it out and return 0 immediately.

                if (hostReserved)
                {
                    // This counter event is guaranteed to be available for host conditional rendering.
                    _current.ReserveForHostAccess();
                }

                _current.Complete(draws > 0);
                _events.Enqueue(_current);

                _current.OnResult += resultHandler;

                result = _current;

                _current = new CounterQueueEvent(this, GetTarget(Type), lastDrawIndex);
            }

            _queuedEvent.Set();

            return(result);
        }
Esempio n. 5
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        public void FlushTo(CounterQueueEvent evt)
        {
            // Flush the counter queue on the main thread.

            Interlocked.Increment(ref _waiterCount);

            _wakeSignal.Set();

            while (!evt.Disposed)
            {
                _eventConsumed.WaitOne(1);
            }

            Interlocked.Decrement(ref _waiterCount);
        }
Esempio n. 6
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        internal CounterQueue(CounterType type)
        {
            Type = type;

            QueryTarget glType = GetTarget(Type);

            _queryPool = new Queue <BufferedQuery>(QueryPoolInitialSize);
            for (int i = 0; i < QueryPoolInitialSize; i++)
            {
                _queryPool.Enqueue(new BufferedQuery(glType));
            }

            _current = new CounterQueueEvent(this, glType, 0);

            _consumerThread = new Thread(EventConsumer);
            _consumerThread.Start();
        }
Esempio n. 7
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        public CounterQueueEvent QueueReport(EventHandler <ulong> resultHandler)
        {
            CounterQueueEvent result;

            lock (_lock)
            {
                _current.Complete();
                _events.Enqueue(_current);

                result           = _current;
                result.OnResult += resultHandler;

                _current = new CounterQueueEvent(this, GetTarget(Type));
            }

            _queuedEvent.Set();

            return(result);
        }
Esempio n. 8
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        public void FlushTo(CounterQueueEvent evt)
        {
            lock (_lock)
            {
                if (evt.Disposed)
                {
                    return;
                }

                // Tell the queue to process all events up to this one.
                while (_events.Count > 0)
                {
                    CounterQueueEvent flush = _events.Dequeue();
                    flush.TryConsume(ref _accumulatedCounter, true);

                    if (flush == evt)
                    {
                        return;
                    }
                }
            }
        }
Esempio n. 9
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        public void Flush(bool blocking)
        {
            if (!blocking)
            {
                // Just wake the consumer thread - it will update the queries.
                _wakeSignal.Set();
                return;
            }

            lock (_lock)
            {
                // Tell the queue to process all events.
                while (_events.Count > 0)
                {
                    CounterQueueEvent flush = _events.Peek();
                    if (!flush.TryConsume(ref _accumulatedCounter, true))
                    {
                        return; // If not blocking, then return when we encounter an event that is not ready yet.
                    }
                    _events.Dequeue();
                }
            }
        }
Esempio n. 10
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        private void EventConsumer()
        {
            while (!Disposed)
            {
                CounterQueueEvent evt = null;
                lock (_lock)
                {
                    if (_events.Count > 0)
                    {
                        evt = _events.Dequeue();
                    }
                }

                if (evt == null)
                {
                    _queuedEvent.WaitOne(); // No more events to go through, wait for more.
                }
                else
                {
                    evt.TryConsume(ref _accumulatedCounter, true, _wakeSignal);
                }
            }
        }