1 // Copyright 2023 The Pigweed Authors 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); you may not 4 // use this file except in compliance with the License. You may obtain a copy of 5 // the License at 6 // 7 // https://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, WITHOUT 11 // WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the 12 // License for the specific language governing permissions and limitations under 13 // the License. 14 #pragma once 15 16 #include "pw_async2/dispatcher.h" 17 18 namespace pw::async2 { 19 20 /// A ``Task`` that delegates to a provided function ``func``. 21 /// 22 /// The provided ``func`` may be any callable (function, lambda, or similar) 23 /// which accepts a ``Context&`` and returns a ``Poll<>``. 24 /// 25 /// The resulting ``Task`` will implement ``Pend`` by invoking ``func``. 26 template <typename Func> 27 class PendFuncTask : public Task { 28 public: 29 /// Create a new ``Task`` which delegates ``Pend`` to ``func``. 30 /// 31 /// See class docs for more details. PendFuncTask(Func && func)32 PendFuncTask(Func&& func) : func_(std::forward<Func>(func)) {} 33 34 private: DoPend(Context & cx)35 Poll<> DoPend(Context& cx) final { return func_(cx); } 36 Func func_; 37 }; 38 39 } // namespace pw::async2 40