15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Copyright (c) 2012 The Chromium Authors. All rights reserved. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// found in the LICENSE file. 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#ifndef CONTENT_COMMON_GPU_SYNC_POINT_MANAGER_H_ 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define CONTENT_COMMON_GPU_SYNC_POINT_MANAGER_H_ 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <vector> 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/callback.h" 117d4cd473f85ac64c3747c96c277f9e506a0d2246Torne (Richard Coles)#include "base/containers/hash_tables.h" 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/memory/ref_counted.h" 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/synchronization/lock.h" 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/threading/thread_checker.h" 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace content { 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// This class manages the sync points, which allow cross-channel 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// synchronization. 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)class SyncPointManager : public base::RefCountedThreadSafe<SyncPointManager> { 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) public: 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SyncPointManager(); 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Generates a sync point, returning its ID. This can me called on any thread. 25cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // IDs start at a random number. Never return 0. 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) uint32 GenerateSyncPoint(); 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Retires a sync point. This will call all the registered callbacks for this 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // sync point. This can only be called on the main thread. 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void RetireSyncPoint(uint32 sync_point); 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Adds a callback to the sync point. The callback will be called when the 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // sync point is retired, or immediately (from within that function) if the 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // sync point was already retired (or not created yet). This can only be 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // called on the main thread. 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void AddSyncPointCallback(uint32 sync_point, const base::Closure& callback); 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 385d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) bool IsSyncPointRetired(uint32 sync_point); 395d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) private: 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) friend class base::RefCountedThreadSafe<SyncPointManager>; 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) typedef std::vector<base::Closure> ClosureList; 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) typedef base::hash_map<uint32, ClosureList > SyncPointMap; 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ~SyncPointManager(); 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::ThreadChecker thread_checker_; 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Protects the 2 fields below. Note: callbacks shouldn't be called with this 505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // held. 515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::Lock lock_; 525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SyncPointMap sync_point_map_; 535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) uint32 next_sync_point_; 545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DISALLOW_COPY_AND_ASSIGN(SyncPointManager); 565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)}; 575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace content 595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif // CONTENT_COMMON_GPU_SYNC_POINT_MANAGER_H_ 61