mirror of
https://github.com/saymrwulf/pytorch.git
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8286ce1e3a
Summary: Closes https://github.com/caffe2/caffe2/pull/1260 Differential Revision: D5906739 Pulled By: Yangqing fbshipit-source-id: e482ba9ba60b5337d9165f28f7ec68d4518a0902
84 lines
2.2 KiB
C++
84 lines
2.2 KiB
C++
/**
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* Copyright (c) 2016-present, Facebook, Inc.
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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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*/
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#pragma once
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#include <atomic>
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#include <condition_variable>
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#include <memory>
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#include <mutex>
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#include <queue>
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#include "caffe2/core/blob_stats.h"
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#include "caffe2/core/logging.h"
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#include "caffe2/core/stats.h"
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#include "caffe2/core/tensor.h"
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#include "caffe2/core/workspace.h"
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namespace caffe2 {
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// A thread-safe, bounded, blocking queue.
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// Modelled as a circular buffer.
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// Containing blobs are owned by the workspace.
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// On read, we swap out the underlying data for the blob passed in for blobs
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class BlobsQueue : public std::enable_shared_from_this<BlobsQueue> {
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public:
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BlobsQueue(
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Workspace* ws,
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const std::string& queueName,
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size_t capacity,
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size_t numBlobs,
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bool enforceUniqueName,
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const std::vector<std::string>& fieldNames = {});
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~BlobsQueue() {
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close();
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}
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bool blockingRead(
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const std::vector<Blob*>& inputs,
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float timeout_secs = 0.0f);
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bool tryWrite(const std::vector<Blob*>& inputs);
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bool blockingWrite(const std::vector<Blob*>& inputs);
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void close();
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size_t getNumBlobs() const {
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return numBlobs_;
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}
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private:
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bool canWrite();
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void doWrite(const std::vector<Blob*>& inputs);
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std::atomic<bool> closing_{false};
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size_t numBlobs_;
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std::mutex mutex_; // protects all variables in the class.
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std::condition_variable cv_;
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int64_t reader_{0};
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int64_t writer_{0};
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std::vector<std::vector<Blob*>> queue_;
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const std::string name_;
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struct QueueStats {
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CAFFE_STAT_CTOR(QueueStats);
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CAFFE_EXPORTED_STAT(queue_balance);
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CAFFE_EXPORTED_STAT(queue_dequeued_records);
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CAFFE_DETAILED_EXPORTED_STAT(queue_dequeued_bytes);
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} stats_;
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};
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} // namespace caffe2
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