mirror of
https://github.com/nestriness/cdc-file-transfer.git
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4326e972ac
The tools allow efficient and fast synchronization of large directory trees from a Windows workstation to a Linux target machine. cdc_rsync* support efficient copy of files by using content-defined chunking (CDC) to identify chunks within files that can be reused. asset_stream_manager + cdc_fuse_fs support efficient streaming of a local directory to a remote virtual file system based on FUSE. It also employs CDC to identify and reuse unchanged data chunks.
71 lines
2.2 KiB
C++
71 lines
2.2 KiB
C++
// Copyright 2022 Google LLC
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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 "cdc_rsync/base/fake_socket.h"
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namespace cdc_ft {
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FakeSocket::FakeSocket() = default;
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FakeSocket::~FakeSocket() = default;
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absl::Status FakeSocket::Send(const void* buffer, size_t size) {
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// Wait until we can send again.
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std::unique_lock<std::mutex> suspend_lock(suspend_mutex_);
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suspend_cv_.wait(suspend_lock, [this]() { return !sending_suspended_; });
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suspend_lock.unlock();
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std::unique_lock<std::mutex> lock(data_mutex_);
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data_.append(static_cast<const char*>(buffer), size);
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lock.unlock();
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data_cv_.notify_all();
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return absl::OkStatus();
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}
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absl::Status FakeSocket::Receive(void* buffer, size_t size,
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bool allow_partial_read,
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size_t* bytes_received) {
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*bytes_received = 0;
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std::unique_lock<std::mutex> lock(data_mutex_);
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data_cv_.wait(lock, [this, size, allow_partial_read]() {
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return allow_partial_read || data_.size() >= size || shutdown_;
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});
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if (shutdown_) {
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return absl::UnavailableError("Pipe is shut down");
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}
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size_t to_copy = std::min(size, data_.size());
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memcpy(buffer, data_.data(), to_copy);
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*bytes_received = to_copy;
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// This is horribly inefficent, but should be OK in a fake.
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data_.erase(0, to_copy);
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return absl::OkStatus();
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}
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void FakeSocket::ShutdownSendingEnd() {
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std::unique_lock<std::mutex> lock(data_mutex_);
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shutdown_ = true;
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lock.unlock();
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data_cv_.notify_all();
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}
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void FakeSocket::SuspendSending(bool suspended) {
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std::unique_lock<std::mutex> lock(suspend_mutex_);
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sending_suspended_ = suspended;
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lock.unlock();
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suspend_cv_.notify_all();
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}
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} // namespace cdc_ft
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