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 , fiberIndex(UINT_MAX) 34 { 35 36 } 37 38 void FiberContext::SetStatus(FiberTaskStatus::Type _taskStatus) 39 { 40 MT_ASSERT(threadContext, "Sanity check failed"); 41 MT_ASSERT(threadContext->threadId.IsEqual(ThreadId::Self()), "You can change task status only from owner thread"); 42 taskStatus = _taskStatus; 43 } 44 45 FiberTaskStatus::Type FiberContext::GetStatus() const 46 { 47 return taskStatus; 48 } 49 50 void FiberContext::SetThreadContext(internal::ThreadContext * _threadContext) 51 { 52 if (_threadContext) 53 { 54 _threadContext->lastActiveFiberContext = this; 55 } 56 57 threadContext = _threadContext; 58 } 59 60 internal::ThreadContext* FiberContext::GetThreadContext() 61 { 62 return threadContext; 63 } 64 65 void FiberContext::Reset() 66 { 67 MT_ASSERT(childrenFibersCount.Load() == 0, "Can't release fiber with active children fibers"); 68 currentTask = internal::TaskDesc(); 69 parentFiber = nullptr; 70 threadContext = nullptr; 71 stackRequirements = StackRequirements::INVALID; 72 } 73 74 void FiberContext::Yield() 75 { 76 taskStatus = FiberTaskStatus::YIELDED; 77 78 Fiber & schedulerFiber = threadContext->schedulerFiber; 79 80 #ifdef MT_INSTRUMENTED_BUILD 81 threadContext->NotifyTaskExecuteStateChanged( currentTask.debugColor, currentTask.debugID, TaskExecuteState::SUSPEND, (int32)fiberIndex); 82 #endif 83 84 // Yielding, so reset thread context 85 threadContext = nullptr; 86 87 //switch to scheduler 88 Fiber::SwitchTo(fiber, schedulerFiber); 89 90 #ifdef MT_INSTRUMENTED_BUILD 91 threadContext->NotifyTaskExecuteStateChanged( currentTask.debugColor, currentTask.debugID, TaskExecuteState::RESUME, (int32)fiberIndex); 92 #endif 93 } 94 95 void FiberContext::RunSubtasksAndYieldImpl(ArrayView<internal::TaskBucket>& buckets) 96 { 97 MT_ASSERT(threadContext, "Sanity check failed!"); 98 MT_ASSERT(threadContext->taskScheduler, "Sanity check failed!"); 99 MT_ASSERT(threadContext->taskScheduler->IsWorkerThread(), "Can't use RunSubtasksAndYield outside Task. Use TaskScheduler.WaitGroup() instead."); 100 MT_ASSERT(threadContext->threadId.IsEqual(ThreadId::Self()), "Thread context sanity check failed"); 101 102 // add to scheduler 103 threadContext->taskScheduler->RunTasksImpl(buckets, this, false); 104 105 // 106 MT_ASSERT(threadContext->threadId.IsEqual(ThreadId::Self()), "Thread context sanity check failed"); 107 108 // Change status 109 taskStatus = FiberTaskStatus::AWAITING_CHILD; 110 111 Fiber & schedulerFiber = threadContext->schedulerFiber; 112 113 #ifdef MT_INSTRUMENTED_BUILD 114 threadContext->NotifyTaskExecuteStateChanged( currentTask.debugColor, currentTask.debugID, TaskExecuteState::SUSPEND, (int32)fiberIndex); 115 #endif 116 117 // Yielding, so reset thread context 118 threadContext = nullptr; 119 120 //switch to scheduler 121 Fiber::SwitchTo(fiber, schedulerFiber); 122 123 #ifdef MT_INSTRUMENTED_BUILD 124 threadContext->NotifyTaskExecuteStateChanged( currentTask.debugColor, currentTask.debugID, TaskExecuteState::RESUME, (int32)fiberIndex); 125 #endif 126 127 } 128 129 130 void FiberContext::RunAsync(TaskGroup taskGroup, const TaskHandle* taskHandleArray, uint32 taskHandleCount) 131 { 132 MT_ASSERT(taskHandleCount < (internal::TASK_BUFFER_CAPACITY - 1), "Too many tasks per one Run."); 133 MT_ASSERT(threadContext, "ThreadContext is nullptr"); 134 MT_ASSERT(threadContext->taskScheduler, "Sanity check failed!"); 135 MT_ASSERT(threadContext->taskScheduler->IsWorkerThread(), "Can't use RunAsync outside Task. Use TaskScheduler.RunAsync() instead."); 136 137 TaskScheduler& scheduler = *(threadContext->taskScheduler); 138 139 ArrayView<internal::GroupedTask> buffer(threadContext->descBuffer, taskHandleCount); 140 141 uint32 bucketCount = MT::Min((uint32)scheduler.GetWorkersCount(), taskHandleCount); 142 ArrayView<internal::TaskBucket> buckets(MT_ALLOCATE_ON_STACK(sizeof(internal::TaskBucket) * bucketCount), bucketCount); 143 144 internal::DistibuteDescriptions(taskGroup, taskHandleArray, buffer, buckets); 145 scheduler.RunTasksImpl(buckets, nullptr, false); 146 } 147 148 149 void FiberContext::RunSubtasksAndYield(TaskGroup taskGroup, const TaskHandle* taskHandleArray, uint32 taskHandleCount) 150 { 151 MT_ASSERT(taskHandleCount < (internal::TASK_BUFFER_CAPACITY - 1), "Too many tasks per one Run."); 152 MT_ASSERT(threadContext, "ThreadContext is nullptr"); 153 MT_ASSERT(threadContext->taskScheduler, "TaskScheduler is nullptr"); 154 155 TaskScheduler& scheduler = *(threadContext->taskScheduler); 156 157 ArrayView<internal::GroupedTask> buffer(threadContext->descBuffer, taskHandleCount); 158 159 uint32 bucketCount = MT::Min((uint32)scheduler.GetWorkersCount(), taskHandleCount); 160 ArrayView<internal::TaskBucket> buckets(MT_ALLOCATE_ON_STACK(sizeof(internal::TaskBucket) * bucketCount), bucketCount); 161 162 internal::DistibuteDescriptions(taskGroup, taskHandleArray, buffer, buckets); 163 RunSubtasksAndYieldImpl(buckets); 164 } 165 166 167 168 } 169