1 // Created on: 2015-05-28 2 // Created by: Denis BOGOLEPOV 3 // Copyright (c) 2015 OPEN CASCADE SAS 4 // 5 // This file is part of Open CASCADE Technology software library. 6 // 7 // This library is free software; you can redistribute it and/or modify it under 8 // the terms of the GNU Lesser General Public License version 2.1 as published 9 // by the Free Software Foundation, with special exception defined in the file 10 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT 11 // distribution for complete text of the license and disclaimer of any warranty. 12 // 13 // Alternatively, this file may be used under the terms of Open CASCADE 14 // commercial license or contractual agreement. 15 16 #ifndef _BVH_BuildQueue_Header 17 #define _BVH_BuildQueue_Header 18 19 #include <BVH_Builder.hxx> 20 21 #include <Standard_Mutex.hxx> 22 #include <NCollection_Sequence.hxx> 23 24 //! Command-queue for parallel building of BVH nodes. 25 class BVH_BuildQueue 26 { 27 template <class T, int N> friend class BVH_QueueBuilder; 28 29 public: 30 31 //! Creates new BVH build queue. BVH_BuildQueue()32 BVH_BuildQueue() 33 : myNbThreads (0) 34 { 35 // 36 } 37 38 //! Releases resources of BVH build queue. ~BVH_BuildQueue()39 ~BVH_BuildQueue() 40 { 41 // 42 } 43 44 public: 45 46 //! Returns current size of BVH build queue. 47 Standard_EXPORT Standard_Integer Size(); 48 49 //! Enqueues new work-item onto BVH build queue. 50 Standard_EXPORT void Enqueue (const Standard_Integer& theNode); 51 52 //! Fetches first work-item from BVH build queue. 53 Standard_EXPORT Standard_Integer Fetch (Standard_Boolean& wasBusy); 54 55 //! Checks if there are active build threads. HasBusyThreads()56 Standard_Boolean HasBusyThreads() 57 { 58 return myNbThreads != 0; 59 } 60 61 protected: 62 63 //! Queue of BVH nodes to build. 64 NCollection_Sequence<Standard_Integer> myQueue; 65 66 protected: 67 68 //! Manages access serialization of working threads. 69 Standard_Mutex myMutex; 70 71 //! Number of active build threads. 72 Standard_Integer myNbThreads; 73 }; 74 75 #endif // _BVH_BuildQueue_Header 76