114 lines
3.9 KiB
C++
114 lines
3.9 KiB
C++
/*
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Copyright (c) 2020-2021 Intel Corporation
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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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http://www.apache.org/licenses/LICENSE-2.0
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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 __TBB_test_common_parallel_invoke_common_H
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#define __TBB_test_common_parallel_invoke_common_H
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#include "config.h"
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#include <cstddef>
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#include <tuple>
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#include "oneapi/tbb/parallel_invoke.h"
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#include "oneapi/tbb/global_control.h"
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#include "dummy_body.h"
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// Helps generate a tuple of functional objects
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template<std::size_t Counter, template <std::size_t> class Functor, class Generator, typename... Fs>
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struct generate_tuple_impl :
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public generate_tuple_impl<Counter - 1, Functor, Generator, typename Generator::template type<Functor, Counter - 1>, Fs...> {};
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template<template <std::size_t> class Functor, class Generator, typename... Fs>
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struct generate_tuple_impl <0, Functor, Generator, Fs...> {
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using type = std::tuple<Fs...>;
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};
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template<std::size_t Size, template <std::size_t> class Functor, class Generator>
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using generate_tuple = typename generate_tuple_impl<Size, Functor, Generator>::type;
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// Defines how generate_tuple should propagate Counter to the tuple members
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struct generator {
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template <template <std::size_t> class Functor, std::size_t NonTypeArg>
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using type = Functor<NonTypeArg>;
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};
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template <std::size_t Fixed>
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struct fixed_generator {
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template <template <std::size_t> class Functor, std::size_t NonTypeArg>
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using type = Functor<Fixed>;
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};
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template<std::size_t LevelTaskCount, std::size_t MaxDepth, std::size_t WorkSize>
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struct invoke_tree {
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struct invoke_tree_leaf {
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static constexpr std::size_t size = WorkSize;
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void operator()() const { utils::doDummyWork(size); }
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};
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// Make invoke_tree_leaf composable with generate_tuple interface
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template <std::size_t NonTypeArg>
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using generating_leaf_functor = invoke_tree_leaf;
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template<std::size_t CurrentDepth>
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struct invoke_tree_node {
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template<typename... Fs>
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void invoker(const std::tuple<Fs...>&) const {
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tbb::parallel_invoke(Fs()...);
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}
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// Template alias to workaround the strange Visual Studio issue
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template<std::size_t Depth>
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using generating_node_functor = invoke_tree_node<Depth>;
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void create_level(/*is_final_level*/std::false_type) const {
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invoker(generate_tuple<LevelTaskCount, generating_node_functor, fixed_generator<CurrentDepth + 1>>{});
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}
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void create_level(/*is_final_level*/std::true_type) const {
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invoker(generate_tuple<LevelTaskCount, generating_leaf_functor, generator>());
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}
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void operator()() const {
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create_level(/*is_final_level*/std::integral_constant<bool, CurrentDepth == MaxDepth>());
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}
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};
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static void generate_and_run() {
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invoke_tree_node<1> tree_root;
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tree_root();
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}
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};
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template<std::size_t TaskCount, template<std::size_t> class Functor>
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class parallel_invoke_call {
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template<typename... Fs>
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static void invoke_tuple_args(tbb::task_group_context* context_ptr, const std::tuple<Fs...>&) {
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if (context_ptr != nullptr) {
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tbb::parallel_invoke(Fs()..., *context_ptr);
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} else {
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tbb::parallel_invoke(Fs()...);
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}
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}
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public:
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static void perform(tbb::task_group_context* context_ptr = nullptr) {
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invoke_tuple_args(context_ptr, generate_tuple<TaskCount, Functor, generator>{});
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}
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};
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#endif // __TBB_test_common_parallel_invoke_common_H
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