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