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98 lines
2.9 KiB
98 lines
2.9 KiB
/* Copyright (c) 2016 PaddlePaddle Authors. All Rights Reserve.
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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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#pragma once
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#include <iostream>
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#include "paddle/platform/enforce.h"
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#include "paddle/platform/variant.h"
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namespace paddle {
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namespace platform {
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struct CPUPlace {
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// WORKAROUND: for some reason, omitting this constructor
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// causes errors with boost 1.59 and OSX
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CPUPlace() {}
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// needed for variant equality comparison
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inline bool operator==(const CPUPlace &) const { return true; }
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inline bool operator!=(const CPUPlace &) const { return false; }
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};
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struct CUDAPlace {
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CUDAPlace() : CUDAPlace(0) {}
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explicit CUDAPlace(int d) : device(d) {}
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inline int GetDeviceId() const { return device; }
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// needed for variant equality comparison
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inline bool operator==(const CUDAPlace &o) const {
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return device == o.device;
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}
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inline bool operator!=(const CUDAPlace &o) const { return !(*this == o); }
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int device;
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};
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struct IsCUDAPlace : public boost::static_visitor<bool> {
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bool operator()(const CPUPlace &) const { return false; }
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bool operator()(const CUDAPlace &gpu) const { return true; }
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};
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typedef boost::variant<CUDAPlace, CPUPlace> Place;
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using PlaceList = std::vector<Place>;
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void set_place(const Place &);
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const Place &get_place();
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const CUDAPlace default_gpu();
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const CPUPlace default_cpu();
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bool is_gpu_place(const Place &);
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bool is_cpu_place(const Place &);
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bool places_are_same_class(const Place &, const Place &);
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bool is_same_place(const Place &, const Place &);
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std::ostream &operator<<(std::ostream &, const Place &);
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template <typename Visitor>
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struct PlaceVisitorWrapper
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: public boost::static_visitor<typename Visitor::result_type> {
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const Visitor &visitor_;
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explicit PlaceVisitorWrapper(const Visitor &visitor) : visitor_(visitor) {}
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typename Visitor::result_type operator()(const CPUPlace &cpu) const {
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return visitor_(cpu);
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}
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typename Visitor::result_type operator()(const CUDAPlace &cuda) const {
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#ifdef PADDLE_WITH_CUDA
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return visitor_(cuda);
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#else
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PADDLE_THROW("Paddle is not compiled with CUDA. Cannot visit cuda device");
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return typename Visitor::result_type();
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#endif
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}
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};
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template <typename Visitor>
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typename Visitor::result_type VisitPlace(const Place &place,
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const Visitor &visitor) {
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return boost::apply_visitor(PlaceVisitorWrapper<Visitor>(visitor), place);
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}
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} // namespace platform
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} // namespace paddle
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