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89 lines
2.2 KiB
89 lines
2.2 KiB
/* Copyright (c) 2016 PaddlePaddle Authors. All Rights Reserved.
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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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// NOTE: This file was originally created by tensorflow
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// (https://github.com/tensorflow/tensorflow/) we borrow this
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// file and did some modifications so that we can send gRPC
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// requests without too much copying of the tensor data.
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#include "paddle/fluid/operators/detail/bytebuffer_stream.h"
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namespace paddle {
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namespace operators {
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namespace detail {
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GrpcByteBufferSource::GrpcByteBufferSource() {}
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bool GrpcByteBufferSource::Init(const grpc::ByteBuffer& src) {
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cur_ = -1;
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left_ = 0;
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ptr_ = nullptr;
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byte_count_ = 0;
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bool ok = src.Dump(&slices_).ok();
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if (!ok) {
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slices_.clear();
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}
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return ok;
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}
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bool GrpcByteBufferSource::Next(const void** data, int* size) {
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// Use loop instead of if in case buffer contained empty slices.
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while (left_ == 0) {
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// Advance to next slice.
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cur_++;
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if (cur_ >= slices_.size()) {
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return false;
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}
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const ::grpc::Slice& s = slices_[cur_];
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left_ = s.size();
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ptr_ = reinterpret_cast<const char*>(s.begin());
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}
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*data = ptr_;
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*size = left_;
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byte_count_ += left_;
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ptr_ += left_;
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left_ = 0;
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return true;
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}
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void GrpcByteBufferSource::BackUp(int count) {
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ptr_ -= count;
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left_ += count;
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byte_count_ -= count;
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}
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bool GrpcByteBufferSource::Skip(int count) {
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const void* data;
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int size;
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while (Next(&data, &size)) {
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if (size >= count) {
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BackUp(size - count);
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return true;
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}
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// size < count;
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count -= size;
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}
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// error or we have too large count;
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return false;
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}
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google::protobuf::int64 GrpcByteBufferSource::ByteCount() const {
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return byte_count_;
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}
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} // namespace detail
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} // namespace operators
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} // namespace paddle
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