forked from huawei/mindspore2022
70 lines
1.9 KiB
C++
70 lines
1.9 KiB
C++
/**
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* Copyright 2019 Huawei Technologies Co., Ltd
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef MINDSPORE_CCSRC_UTILS_SIGNAL_H_
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#define MINDSPORE_CCSRC_UTILS_SIGNAL_H_
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#include <functional>
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#include <memory>
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#include <vector>
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#include <utility>
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namespace mindspore {
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template <class Return, class Type, class... Args>
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std::function<Return(Args...)> bind_member(Type *instance, Return (Type::*method)(Args...)) {
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return [=](Args &&... args) -> Return { return (instance->*method)(std::forward<Args>(args)...); };
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}
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template <class FuncType>
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class Slot {
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public:
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explicit Slot(const std::function<FuncType> &callback) : callback(callback) {}
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~Slot() {}
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std::function<FuncType> callback = nullptr;
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};
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template <class FuncType>
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class Signal {
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public:
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template <class... Args>
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void operator()(Args &&... args) {
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for (auto &slot : slots_) {
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if (slot->callback != nullptr) {
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slot->callback(std::forward<Args>(args)...);
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}
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}
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}
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void add_slot(const std::function<FuncType> &func) {
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auto slot = std::make_shared<Slot<FuncType>>(func);
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slots_.push_back(slot);
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}
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// signal connect to a class member func
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template <class InstanceType, class MemberFuncType>
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void connect(InstanceType instance, MemberFuncType func) {
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add_slot(bind_member(instance, func));
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}
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private:
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std::vector<std::shared_ptr<Slot<FuncType>>> slots_;
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};
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} // namespace mindspore
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#endif // MINDSPORE_CCSRC_UTILS_EVENT_H_
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