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
1.9 KiB
C++
84 lines
1.9 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/logging.h"
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#include "caffe2/core/operator.h"
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#include "caffe2/core/stats.h"
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#include "caffe2/core/tensor.h"
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namespace caffe2 {
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// TODO: This is a very naive implementation with a single mutex. We can do the
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// atomic index + circular queue optimizations or pull something more
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// heavy-weight later
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class RebatchingQueue {
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public:
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RebatchingQueue(size_t capacity, size_t numBlobs);
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~RebatchingQueue();
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bool enqueueOne(
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CPUContext& context,
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const std::vector<const TensorCPU*>& inputs);
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bool enqueueMany(
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CPUContext& context,
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const std::vector<const TensorCPU*>& inputs);
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bool dequeue(
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CPUContext& context,
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size_t numElements,
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const std::vector<TensorCPU*>& outputs);
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size_t capacity() const;
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size_t numBlobs() const;
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bool isClosed() const;
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void close();
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private:
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bool enqueue(std::vector<std::vector<TensorCPU>> splittedInputs);
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bool canWrite() const;
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bool canRead() const;
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const size_t capacity_;
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const size_t numBlobs_;
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mutable std::mutex mutex_;
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bool isClosed_{false};
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uint64_t head_{0};
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uint64_t tail_{0};
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std::condition_variable cvEmpty_;
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std::condition_variable cvOverflow_;
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std::vector<std::vector<TensorCPU>> queue_;
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};
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} // caffe2
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