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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.
78 lines
1.8 KiB
C++
78 lines
1.8 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 "common/scoped_handle_win.h"
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#define WIN32_LEAN_AND_MEAN
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#include <windows.h>
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#include <cassert>
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#include <memory>
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namespace cdc_ft {
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ScopedHandle::ScopedHandle() : handle_(nullptr) {}
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ScopedHandle::ScopedHandle(HANDLE handle) : handle_(nullptr) { Set(handle); }
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ScopedHandle::ScopedHandle(ScopedHandle&& other) : handle_(nullptr) {
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Set(other.Release());
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}
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ScopedHandle::~ScopedHandle() { Close(); }
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bool ScopedHandle::IsValid() const { return IsHandleValid(handle_); }
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ScopedHandle& ScopedHandle::operator=(ScopedHandle&& other) {
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Set(other.Release());
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return *this;
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}
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void ScopedHandle::Set(HANDLE handle) {
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if (handle_ != handle) {
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// Preserve old error code.
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uint32_t last_error = GetLastError();
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Close();
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if (IsHandleValid(handle)) {
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handle_ = handle;
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}
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SetLastError(last_error);
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}
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}
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HANDLE ScopedHandle::Get() const {
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assert(IsValid());
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return handle_;
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}
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HANDLE ScopedHandle::Release() {
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HANDLE temp = handle_;
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handle_ = nullptr;
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return temp;
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}
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void ScopedHandle::Close() {
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if (IsHandleValid(handle_)) {
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CloseHandle(handle_);
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handle_ = nullptr;
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}
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}
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bool ScopedHandle::IsHandleValid(HANDLE handle) {
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return handle != nullptr && handle != INVALID_HANDLE_VALUE;
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}
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} // namespace cdc_ft
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