1 /* 2 * Copyright (c) 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 META_API_TASK_QUEUE_H 17 #define META_API_TASK_QUEUE_H 18 19 #include <base/containers/type_traits.h> 20 21 #include <meta/api/task.h> 22 #include <meta/interface/detail/any.h> 23 #include <meta/interface/interface_helpers.h> 24 #include <meta/interface/intf_promise.h> 25 #include <meta/interface/intf_task_queue_registry.h> 26 META_BEGIN_NAMESPACE()27META_BEGIN_NAMESPACE() 28 29 template<typename Func> 30 auto CreateFutureFromResultFunction(Func func) 31 { 32 // todo: add support for lighter promise construction 33 auto p = GetObjectRegistry().Create<IPromise>(ClassId::Promise); 34 auto fut = p->GetFuture(); 35 p->Set(QueueWaitableTask(BASE_NS::move(func)).Invoke()); 36 return Future<PlainType_t<decltype(func())>>(fut); 37 } 38 39 template<typename Func> AddFutureTaskOrRunDirectly(const ITaskQueue::Ptr & queue,Func func)40auto AddFutureTaskOrRunDirectly(const ITaskQueue::Ptr& queue, Func func) 41 { 42 auto q = GetTaskQueueRegistry().GetCurrentTaskQueue(); 43 if (q == queue) { 44 return CreateFutureFromResultFunction(BASE_NS::move(func)); 45 } 46 return Future<PlainType_t<decltype(func())>>(queue->AddWaitableTask(CreateWaitableTask(func))); 47 } 48 49 META_END_NAMESPACE() 50 51 #endif 52