1 /** 2 * Copyright (c) 2023-2024 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 #ifndef PANDA_RUNTIME_COROUTINES_COROUTINE_CONTEXT_H 16 #define PANDA_RUNTIME_COROUTINES_COROUTINE_CONTEXT_H 17 18 #include "runtime/coroutines/coroutine.h" 19 20 namespace ark { 21 22 /** 23 * @brief Native context of a coroutine. 24 * 25 * Implementation dependent: may contain register state or OS thread pointer or something else. 26 * Does not contain managed state (contains native state only). 27 */ 28 class CoroutineContext { 29 public: 30 NO_COPY_SEMANTIC(CoroutineContext); 31 NO_MOVE_SEMANTIC(CoroutineContext); 32 33 CoroutineContext() = default; 34 virtual ~CoroutineContext() = default; 35 AttachToCoroutine(Coroutine * co)36 virtual void AttachToCoroutine(Coroutine *co) 37 { 38 co_ = co; 39 } 40 /// Get linked coroutine instance (contains managed portion of state) GetCoroutine()41 Coroutine *GetCoroutine() 42 { 43 return co_; 44 } 45 // access to status might require implementation-dependent synchronization, so we have to store it 46 // in the native context 47 virtual Coroutine::Status GetStatus() const = 0; 48 virtual void SetStatus(Coroutine::Status newStatus) = 0; 49 50 virtual void Destroy() = 0; 51 virtual void CleanUp() = 0; 52 virtual void RequestSuspend(bool getsBlocked) = 0; 53 virtual void RequestResume() = 0; 54 virtual void RequestUnblock() = 0; 55 56 /** 57 * Writes coroutine stack parameters into the provided stack_addr, stack_size, guard_size variables 58 * and returns true on successful operation 59 */ 60 virtual bool RetrieveStackInfo(void *&stackAddr, size_t &stackSize, size_t &guardSize) = 0; 61 62 protected: UpdateId(os::thread::ThreadId id,Coroutine * co)63 static void UpdateId(os::thread::ThreadId id, Coroutine *co) 64 { 65 co->UpdateId(id); 66 } 67 68 private: 69 Coroutine *co_ = nullptr; 70 }; 71 72 } // namespace ark 73 74 #endif // PANDA_RUNTIME_COROUTINES_COROUTINE_CONTEXT_H 75