1 // The MIT License (MIT) 2 // 3 // Copyright (c) 2015 Sergey Makeev, Vadim Slyusarev 4 // 5 // Permission is hereby granted, free of charge, to any person obtaining a copy 6 // of this software and associated documentation files (the "Software"), to deal 7 // in the Software without restriction, including without limitation the rights 8 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 9 // copies of the Software, and to permit persons to whom the Software is 10 // furnished to do so, subject to the following conditions: 11 // 12 // The above copyright notice and this permission notice shall be included in 13 // all copies or substantial portions of the Software. 14 // 15 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 18 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 20 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 21 // THE SOFTWARE. 22 23 #pragma once 24 25 #include <MTTools.h> 26 #include <MTPlatform.h> 27 #include <MTConcurrentQueueLIFO.h> 28 #include <MTStackArray.h> 29 #include <MTArrayView.h> 30 #include <MTThreadContext.h> 31 #include <MTFiberContext.h> 32 #include <MTTaskBase.h> 33 34 #ifdef MT_INSTRUMENTED_BUILD 35 #include <MTMicroWebSrv.h> 36 #endif 37 38 namespace MT 39 { 40 const uint32 MT_MAX_THREAD_COUNT = 32; 41 const uint32 MT_MAX_FIBERS_COUNT = 128; 42 const uint32 MT_SCHEDULER_STACK_SIZE = 131072; 43 const uint32 MT_FIBER_STACK_SIZE = 32768; 44 45 namespace internal 46 { 47 struct ThreadContext; 48 } 49 50 //////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// 51 // Task scheduler 52 //////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// 53 class TaskScheduler 54 { 55 friend class FiberContext; 56 friend struct internal::ThreadContext; 57 58 struct GroupStats 59 { 60 AtomicInt inProgressTaskCount; 61 Event allDoneEvent; 62 63 GroupStats() 64 { 65 inProgressTaskCount.Set(0); 66 allDoneEvent.Create( EventReset::MANUAL, true ); 67 } 68 }; 69 70 // Thread index for new task 71 AtomicInt roundRobinThreadIndex; 72 73 // Threads created by task manager 74 uint32 threadsCount; 75 internal::ThreadContext threadContext[MT_MAX_THREAD_COUNT]; 76 77 // Per group task statistic 78 GroupStats groupStats[TaskGroup::COUNT]; 79 80 // All groups task statistic 81 GroupStats allGroupStats; 82 83 84 //Task awaiting group through FiberContext::WaitGroupAndYield call 85 ConcurrentQueueLIFO<FiberContext*> waitTaskQueues[TaskGroup::COUNT]; 86 87 88 // Fibers pool 89 ConcurrentQueueLIFO<FiberContext*> availableFibers; 90 91 // Fibers context 92 FiberContext fiberContext[MT_MAX_FIBERS_COUNT]; 93 94 #ifdef MT_INSTRUMENTED_BUILD 95 int32 webServerPort; 96 profile::MicroWebServer profilerWebServer; 97 int64 startTime; 98 #endif 99 100 FiberContext* RequestFiberContext(internal::GroupedTask& task); 101 void ReleaseFiberContext(FiberContext* fiberExecutionContext); 102 void RunTasksImpl(ArrayView<internal::TaskBucket>& buckets, FiberContext * parentFiber, bool restoredFromAwaitState); 103 104 static void ThreadMain( void* userData ); 105 static void FiberMain( void* userData ); 106 static bool TryStealTask(internal::ThreadContext& threadContext, internal::GroupedTask & task, uint32 workersCount); 107 108 static FiberContext* ExecuteTask (internal::ThreadContext& threadContext, FiberContext* fiberContext); 109 110 public: 111 112 /// \brief Initializes a new instance of the TaskScheduler class. 113 /// \param workerThreadsCount Worker threads count. Automatically determines the required number of threads if workerThreadsCount set to 0 114 TaskScheduler(uint32 workerThreadsCount = 0); 115 ~TaskScheduler(); 116 117 template<class TTask> 118 void RunAsync(TaskGroup::Type group, TTask* taskArray, uint32 taskCount); 119 120 bool WaitGroup(TaskGroup::Type group, uint32 milliseconds); 121 bool WaitAll(uint32 milliseconds); 122 123 bool IsEmpty(); 124 125 uint32 GetWorkerCount() const; 126 127 bool IsWorkerThread() const; 128 129 #ifdef MT_INSTRUMENTED_BUILD 130 131 size_t GetProfilerEvents(uint32 workerIndex, MT::ProfileEventDesc * dstBuffer, size_t dstBufferSize); 132 void UpdateProfiler(); 133 int32 GetWebServerPort() const; 134 135 inline int64 GetStartTime() const 136 { 137 return startTime; 138 } 139 140 #endif 141 }; 142 } 143 144 #include "MTScheduler.inl" 145 #include "MTFiberContext.inl" 146