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// Copyright (c) 2018 PaddlePaddle 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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#include "paddle/fluid/operators/reader/py_array_feed_queue.h"
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namespace paddle {
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namespace operators {
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namespace reader {
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class PyArrayReader : public framework::ReaderBase {
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public:
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explicit PyArrayReader(const std::shared_ptr<PyArrayFeedQueue>& queue) {
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PADDLE_ENFORCE(queue != nullptr, "PyArrayFeedQueue must not be null");
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queue_ = queue;
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}
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void ReadNext(std::vector<framework::LoDTensor>* out) override {
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*out = queue_->Dequeue();
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}
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void ReInit() override {}
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private:
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std::shared_ptr<PyArrayFeedQueue> queue_;
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};
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class CreatePyArrayReaderOp : public framework::OperatorBase {
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public:
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using framework::OperatorBase::OperatorBase;
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private:
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void RunImpl(const framework::Scope& scope,
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const platform::Place& dev_place) const override {
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const std::string& feeder_name = Attr<std::string>("feeder_name");
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auto* feeder_holder_var = scope.FindVar(feeder_name);
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PADDLE_ENFORCE(feeder_holder_var != nullptr,
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"No PyArrayFeedQueue variable with name %s found",
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feeder_name);
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auto* feeder_holder =
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feeder_holder_var->template GetMutable<PyArrayFeedQueueHolder>();
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auto* out = scope.FindVar(Output("Out"))
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->template GetMutable<framework::ReaderHolder>();
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out->Reset(new PyArrayReader(feeder_holder->GetFeeder()));
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}
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};
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class CreatePyArrayReaderOpMaker : public FileReaderMakerBase {
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protected:
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void Apply() override {
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AddAttr<std::string>("feeder_name",
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"Name of the `PyArrayFeedQueueHolder` variable");
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AddComment(R"DOC(
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Create PyArrayReader to accept Python data feeding.
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)DOC");
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}
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};
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} // namespace reader
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} // namespace operators
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} // namespace paddle
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namespace reader = ::paddle::operators::reader;
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REGISTER_FILE_READER_OPERATOR(create_py_array_reader,
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reader::CreatePyArrayReaderOp,
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reader::CreatePyArrayReaderOpMaker);
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