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 #include <MTScheduler.h> 24 25 namespace MT 26 { 27 FiberContext::FiberContext() 28 : threadContext(nullptr) 29 , taskStatus(FiberTaskStatus::UNKNOWN) 30 , stackRequirements(StackRequirements::INVALID) 31 , childrenFibersCount(0) 32 , parentFiber(nullptr) 33 { 34 35 } 36 37 void FiberContext::SetStatus(FiberTaskStatus::Type _taskStatus) 38 { 39 MT_ASSERT(threadContext, "Sanity check failed"); 40 MT_ASSERT(threadContext->threadId.IsEqual(ThreadId::Self()), "You can change task status only from owner thread"); 41 taskStatus = _taskStatus; 42 } 43 44 FiberTaskStatus::Type FiberContext::GetStatus() const 45 { 46 return taskStatus; 47 } 48 49 void FiberContext::SetThreadContext(internal::ThreadContext * _threadContext) 50 { 51 if (_threadContext) 52 { 53 _threadContext->lastActiveFiberContext = this; 54 55 #ifdef MT_INSTRUMENTED_BUILD 56 _threadContext->NotifyFiberAssignedToThread( fiberIndex, _threadContext->workerIndex ); 57 #endif 58 } 59 60 threadContext = _threadContext; 61 } 62 63 internal::ThreadContext* FiberContext::GetThreadContext() 64 { 65 return threadContext; 66 } 67 68 void FiberContext::Reset() 69 { 70 MT_ASSERT(childrenFibersCount.Load() == 0, "Can't release fiber with active children fibers"); 71 currentTask = internal::TaskDesc(); 72 parentFiber = nullptr; 73 threadContext = nullptr; 74 stackRequirements = StackRequirements::INVALID; 75 } 76 77 void FiberContext::Yield() 78 { 79 taskStatus = FiberTaskStatus::YIELDED; 80 81 Fiber & schedulerFiber = threadContext->schedulerFiber; 82 83 #ifdef MT_INSTRUMENTED_BUILD 84 threadContext->NotifyTaskExecuteStateChanged( currentTask.debugColor, currentTask.debugID, TaskExecuteState::SUSPEND ); 85 #endif 86 87 // Yielding, so reset thread context 88 threadContext = nullptr; 89 90 //switch to scheduler 91 Fiber::SwitchTo(fiber, schedulerFiber); 92 93 #ifdef MT_INSTRUMENTED_BUILD 94 threadContext->NotifyTaskExecuteStateChanged( currentTask.debugColor, currentTask.debugID, TaskExecuteState::RESUME ); 95 #endif 96 } 97 98 void FiberContext::RunSubtasksAndYieldImpl(ArrayView<internal::TaskBucket>& buckets) 99 { 100 MT_ASSERT(threadContext, "Sanity check failed!"); 101 MT_ASSERT(threadContext->taskScheduler, "Sanity check failed!"); 102 MT_ASSERT(threadContext->taskScheduler->IsWorkerThread(), "Can't use RunSubtasksAndYield outside Task. Use TaskScheduler.WaitGroup() instead."); 103 MT_ASSERT(threadContext->threadId.IsEqual(ThreadId::Self()), "Thread context sanity check failed"); 104 105 // add to scheduler 106 threadContext->taskScheduler->RunTasksImpl(buckets, this, false); 107 108 // 109 MT_ASSERT(threadContext->threadId.IsEqual(ThreadId::Self()), "Thread context sanity check failed"); 110 111 // Change status 112 taskStatus = FiberTaskStatus::AWAITING_CHILD; 113 114 Fiber & schedulerFiber = threadContext->schedulerFiber; 115 116 #ifdef MT_INSTRUMENTED_BUILD 117 threadContext->NotifyTaskExecuteStateChanged( currentTask.debugColor, currentTask.debugID, TaskExecuteState::SUSPEND ); 118 #endif 119 120 // Yielding, so reset thread context 121 threadContext = nullptr; 122 123 //switch to scheduler 124 Fiber::SwitchTo(fiber, schedulerFiber); 125 126 #ifdef MT_INSTRUMENTED_BUILD 127 threadContext->NotifyTaskExecuteStateChanged( currentTask.debugColor, currentTask.debugID, TaskExecuteState::RESUME ); 128 #endif 129 130 } 131 132 133 void FiberContext::RunAsync(TaskGroup taskGroup, const TaskHandle* taskHandleArray, uint32 taskHandleCount) 134 { 135 MT_ASSERT(taskHandleCount < (internal::TASK_BUFFER_CAPACITY - 1), "Too many tasks per one Run."); 136 MT_ASSERT(threadContext, "ThreadContext is nullptr"); 137 MT_ASSERT(threadContext->taskScheduler, "Sanity check failed!"); 138 MT_ASSERT(threadContext->taskScheduler->IsWorkerThread(), "Can't use RunAsync outside Task. Use TaskScheduler.RunAsync() instead."); 139 140 TaskScheduler& scheduler = *(threadContext->taskScheduler); 141 142 ArrayView<internal::GroupedTask> buffer(threadContext->descBuffer, taskHandleCount); 143 144 uint32 bucketCount = MT::Min((uint32)scheduler.GetWorkersCount(), taskHandleCount); 145 ArrayView<internal::TaskBucket> buckets(MT_ALLOCATE_ON_STACK(sizeof(internal::TaskBucket) * bucketCount), bucketCount); 146 147 internal::DistibuteDescriptions(taskGroup, taskHandleArray, buffer, buckets); 148 scheduler.RunTasksImpl(buckets, nullptr, false); 149 } 150 151 152 void FiberContext::RunSubtasksAndYield(TaskGroup taskGroup, const TaskHandle* taskHandleArray, uint32 taskHandleCount) 153 { 154 MT_ASSERT(taskHandleCount < (internal::TASK_BUFFER_CAPACITY - 1), "Too many tasks per one Run."); 155 MT_ASSERT(threadContext, "ThreadContext is nullptr"); 156 MT_ASSERT(threadContext->taskScheduler, "TaskScheduler is nullptr"); 157 158 TaskScheduler& scheduler = *(threadContext->taskScheduler); 159 160 ArrayView<internal::GroupedTask> buffer(threadContext->descBuffer, taskHandleCount); 161 162 uint32 bucketCount = MT::Min((uint32)scheduler.GetWorkersCount(), taskHandleCount); 163 ArrayView<internal::TaskBucket> buckets(MT_ALLOCATE_ON_STACK(sizeof(internal::TaskBucket) * bucketCount), bucketCount); 164 165 internal::DistibuteDescriptions(taskGroup, taskHandleArray, buffer, buckets); 166 RunSubtasksAndYieldImpl(buckets); 167 } 168 169 170 171 } 172