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 16 #ifndef PANDA_RUNTIME_COROUTINES_STACKFUL_COMMON_H 17 #define PANDA_RUNTIME_COROUTINES_STACKFUL_COMMON_H 18 19 #include "libpandabase/globals.h" 20 21 namespace ark::stackful_coroutines { 22 23 // every bit means that the corresponding worker is allowed 24 using AffinityMask = size_t; 25 // all ones 26 inline constexpr AffinityMask AFFINITY_MASK_FULL = std::numeric_limits<AffinityMask>::max(); 27 // all zeros 28 inline constexpr AffinityMask AFFINITY_MASK_NONE = 0U; 29 30 // maximum workers count should conform to number of bits in the affinity mask 31 inline constexpr size_t MAX_WORKERS_COUNT = sizeof(AffinityMask) * BITS_PER_BYTE; 32 // maximum worker id is bound by the number of bits in the affinity mask 33 inline constexpr size_t MAX_WORKER_ID = MAX_WORKERS_COUNT - 1U; 34 // ID's type must be capable of holding values from [0 to MAX_WORKER_ID] 35 using WorkerId = size_t; 36 // must be something obviously erroneous (> MAX_WORKER_ID) 37 inline constexpr WorkerId INVALID_WORKER_ID = std::numeric_limits<WorkerId>::max(); 38 // must be something easy to assign and comprehend 39 inline constexpr WorkerId MAIN_WORKER_ID = 0U; 40 41 } // namespace ark::stackful_coroutines 42 43 #endif /* PANDA_RUNTIME_COROUTINES_STACKFUL_COMMON_H */ 44