wehub-resource-sync
134 lines
3.2 KiB
C++
134 lines
3.2 KiB
C++
// Copyright (c) 2021 CINN Authors. All Rights Reserved.
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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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#pragma once
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#include <functional>
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#include <string>
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#include <utility>
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#include <vector>
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#include "paddle/cinn/common/cinn_value.h"
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#include "paddle/cinn/ir/ir.h"
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namespace cinn {
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namespace lang {
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using cinn::common::CINNValue;
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/**
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* A single argument value to Function.
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*/
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using ArgValue = CINNValue;
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using RetValue = CINNValue;
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/**
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* Arguments of the PackedFunc.
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*/
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class Args {
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public:
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Args() = default;
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Args(cinn_value_t* values, int* type_codes, int len);
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//! Append a \p value of type code \p type_code.
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void Append(const ArgValue& arg) { values_.push_back(arg); }
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//! Count of the arguments.
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size_t size() const { return values_.size(); }
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//! if the arguments is empty
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bool empty() const { return values_.empty(); }
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//! Get i-th element.
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ArgValue& operator[](int i) { return values_[i]; }
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const ArgValue& operator[](int i) const { return values_[i]; }
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cinn::common::CINNValuePack ToValuePack() const {
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return cinn::common::CINNValuePack(values_);
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}
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private:
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std::vector<ArgValue> values_;
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};
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namespace detail {
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template <bool stop, std::size_t I, typename F>
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struct for_each_dispatcher {
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template <typename T, typename... Args>
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static void Run(const F& f, T&& value, Args&&... args) {
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f(I, std::forward<T>(value));
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for_each_dispatcher<sizeof...(Args) == 0, I + 1, F>::Run(
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f, std::forward<Args>(args)...);
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}
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};
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template <std::size_t I, typename F>
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struct for_each_dispatcher<true, I, F> {
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static void Run(const F& f) {}
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};
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template <typename F, typename... Args>
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inline void for_each(const F& f, Args&&... args) {
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for_each_dispatcher<sizeof...(Args) == 0, 0, F>::Run(
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f, std::forward<Args>(args)...);
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}
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struct FuncArgsSetter {
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FuncArgsSetter(Args* args) : args_(args) {} // NOLINT
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template <typename T>
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void operator()(size_t I, T v) const {
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args_->Append(ArgValue(v));
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}
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private:
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mutable Args* args_{};
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};
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} // namespace detail
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/**
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* A function defininer with the arguments packed, all the PackedFuncs have the
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* same signature.
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*/
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class PackedFunc {
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public:
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using body_t = std::function<void(Args args, RetValue*)>;
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PackedFunc() = default;
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explicit PackedFunc(const std::string& name) : name_(name) {}
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explicit PackedFunc(body_t body) : body_(body) {}
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template <typename... Args_>
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inline RetValue operator()(Args_&&... args) const {
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Args _args;
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detail::FuncArgsSetter setter(&_args);
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detail::for_each(setter, std::forward<Args_>(args)...);
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RetValue ret_value;
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body_(_args, &ret_value);
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return ret_value;
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}
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inline body_t body() const { return body_; }
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private:
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std::string name_;
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body_t body_;
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};
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} // namespace lang
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} // namespace cinn
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