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