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78 lines
2.1 KiB
78 lines
2.1 KiB
// 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/framework/reader.h"
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#include <deque>
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namespace paddle {
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namespace framework {
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void ReaderBase::ReadNext(std::vector<LoDTensor> *out) {
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std::lock_guard<std::mutex> lock(mu_);
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PADDLE_ENFORCE_EQ(status_, ReaderStatus::kRunning);
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ReadNextImpl(out);
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}
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void ReaderBase::InsertDecoratedReader(
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const std::shared_ptr<ReaderBase> &decorated_reader) {
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std::lock_guard<std::mutex> guard(mu_);
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decorated_readers_.emplace_back(decorated_reader);
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}
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std::unordered_set<ReaderBase *> ReaderBase::GetEndPoints() {
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std::unordered_set<ReaderBase *> result;
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std::deque<ReaderBase *> queue;
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queue.emplace_back(this);
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while (!queue.empty()) { // BFS search
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auto *front = queue.front();
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queue.pop_front();
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if (front->decorated_readers_.empty()) {
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result.emplace(front);
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} else {
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for (auto &reader : front->decorated_readers_) {
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if (auto *reader_ptr = reader.lock().get()) {
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queue.emplace_back(reader_ptr);
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}
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}
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}
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}
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return result;
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}
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void ReaderBase::Shutdown() {
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std::lock_guard<std::mutex> lock(mu_);
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if (status_ != ReaderStatus::kStopped) {
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ShutdownImpl();
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status_ = ReaderStatus::kStopped;
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}
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}
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void ReaderBase::Start() {
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std::lock_guard<std::mutex> lock(mu_);
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if (status_ != ReaderStatus::kRunning) {
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StartImpl();
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status_ = ReaderStatus::kRunning;
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}
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}
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ReaderBase::~ReaderBase() {}
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DecoratedReader::~DecoratedReader() {
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VLOG(1) << "~DecoratedReader";
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reader_->Shutdown();
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}
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} // namespace framework
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} // namespace paddle
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