Introduce XPRESS compresssion on Windows. (#1081)
Comparable with Snappy on comp ratio. Implemented using Windows API, does not require external package. Avaiable since Windows 8 and server 2012. Use -DXPRESS=1 with CMake to enable.main
Dmitri Smirnov
9 years ago
committed by
Siying Dong
parent
874c96ac1d
commit
ee221d2de0
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// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
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// This source code is licensed under the BSD-style license found in the
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// LICENSE file in the root directory of this source tree. An additional grant
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// of patent rights can be found in the PATENTS file in the same directory.
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//
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// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file. See the AUTHORS file for names of contributors.
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#include "port/win/xpress_win.h" |
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#include <Windows.h> |
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#include <cassert> |
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#include <memory> |
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#include <limits> |
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#include <iostream> |
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#ifdef XPRESS |
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#ifdef JEMALLOC |
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#include <jemalloc/jemalloc.h> |
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#endif |
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// Put this under ifdef so windows systems w/o this
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// can still build
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#include <compressapi.h> |
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namespace rocksdb { |
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namespace port { |
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namespace xpress { |
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// Helpers
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namespace { |
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auto CloseCompressorFun = [](void* h) { |
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if (NULL != h) { |
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::CloseCompressor(reinterpret_cast<COMPRESSOR_HANDLE>(h)); |
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} |
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}; |
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auto CloseDecompressorFun = [](void* h) { |
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if (NULL != h) { |
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::CloseDecompressor(reinterpret_cast<DECOMPRESSOR_HANDLE>(h)); |
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} |
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}; |
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#ifdef JEMALLOC |
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// Make sure compressors use our jemalloc if redirected
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PVOID CompressorAlloc(PVOID, SIZE_T size) { |
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return je_malloc(size); |
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} |
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VOID CompressorFree(PVOID, PVOID p) { |
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if (p != NULL) { |
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je_free(p); |
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} |
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} |
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#endif |
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} |
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bool Compress(const char* input, size_t length, std::string* output) { |
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assert(input != nullptr); |
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assert(output != nullptr); |
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if (length == 0) { |
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output->clear(); |
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return true; |
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} |
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COMPRESS_ALLOCATION_ROUTINES* allocRoutinesPtr = nullptr; |
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#ifdef JEMALLOC |
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COMPRESS_ALLOCATION_ROUTINES allocationRoutines; |
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// Init. allocation routines
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allocationRoutines.Allocate = CompressorAlloc; |
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allocationRoutines.Free = CompressorFree; |
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allocationRoutines.UserContext = NULL; |
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allocRoutinesPtr = &allocationRoutines; |
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#endif |
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COMPRESSOR_HANDLE compressor = NULL; |
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BOOL success = CreateCompressor( |
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COMPRESS_ALGORITHM_XPRESS, // Compression Algorithm
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allocRoutinesPtr, // Optional allocation routine
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&compressor); // Handle
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if (!success) { |
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#ifdef _DEBUG |
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std::cerr << "XPRESS: Failed to create Compressor LastError: " << |
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GetLastError() << std::endl; |
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#endif |
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return false; |
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} |
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std::unique_ptr<void, decltype(CloseCompressorFun)> |
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compressorGuard(compressor, CloseCompressorFun); |
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SIZE_T compressedBufferSize = 0; |
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// Query compressed buffer size.
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success = ::Compress( |
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compressor, // Compressor Handle
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const_cast<char*>(input), // Input buffer
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length, // Uncompressed data size
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NULL, // Compressed Buffer
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0, // Compressed Buffer size
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&compressedBufferSize); // Compressed Data size
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if (!success) { |
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auto lastError = GetLastError(); |
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if (lastError != ERROR_INSUFFICIENT_BUFFER) { |
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#ifdef _DEBUG |
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std::cerr << |
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"XPRESS: Failed to estimate compressed buffer size LastError " << |
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lastError << std::endl; |
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#endif |
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return false; |
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} |
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} |
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assert(compressedBufferSize > 0); |
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std::string result; |
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result.resize(compressedBufferSize); |
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SIZE_T compressedDataSize = 0; |
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// Compress
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success = ::Compress( |
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compressor, // Compressor Handle
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const_cast<char*>(input), // Input buffer
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length, // Uncompressed data size
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&result[0], // Compressed Buffer
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compressedBufferSize, // Compressed Buffer size
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&compressedDataSize); // Compressed Data size
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if (!success) { |
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#ifdef _DEBUG |
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std::cerr << "XPRESS: Failed to compress LastError " << |
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GetLastError() << std::endl; |
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#endif |
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return false; |
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} |
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result.resize(compressedDataSize); |
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output->swap(result); |
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return true; |
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} |
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char* Decompress(const char* input_data, size_t input_length, |
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int* decompress_size) { |
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assert(input_data != nullptr); |
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assert(decompress_size != nullptr); |
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if (input_length == 0) { |
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return nullptr; |
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} |
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COMPRESS_ALLOCATION_ROUTINES* allocRoutinesPtr = nullptr; |
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#ifdef JEMALLOC |
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COMPRESS_ALLOCATION_ROUTINES allocationRoutines; |
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// Init. allocation routines
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allocationRoutines.Allocate = CompressorAlloc; |
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allocationRoutines.Free = CompressorFree; |
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allocationRoutines.UserContext = NULL; |
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allocRoutinesPtr = &allocationRoutines; |
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#endif |
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DECOMPRESSOR_HANDLE decompressor = NULL; |
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BOOL success = CreateDecompressor( |
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COMPRESS_ALGORITHM_XPRESS, // Compression Algorithm
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allocRoutinesPtr, // Optional allocation routine
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&decompressor); // Handle
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if (!success) { |
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#ifdef _DEBUG |
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std::cerr <<
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"XPRESS: Failed to create Decompressor LastError " << |
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GetLastError() << std::endl; |
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#endif |
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return nullptr; |
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} |
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std::unique_ptr<void, decltype(CloseDecompressorFun)> |
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compressorGuard(decompressor, CloseDecompressorFun); |
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SIZE_T decompressedBufferSize = 0; |
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success = ::Decompress( |
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decompressor, // Compressor Handle
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const_cast<char*>(input_data), // Compressed data
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input_length, // Compressed data size
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NULL, // Buffer set to NULL
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0, // Buffer size set to 0
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&decompressedBufferSize); // Decompressed Data size
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if (!success) { |
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auto lastError = GetLastError(); |
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if (lastError != ERROR_INSUFFICIENT_BUFFER) { |
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#ifdef _DEBUG |
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std::cerr <<
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"XPRESS: Failed to estimate decompressed buffer size LastError " << |
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lastError << std::endl; |
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#endif |
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return nullptr; |
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} |
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} |
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assert(decompressedBufferSize > 0); |
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// On Windows we are limited to a 32-bit int for the
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// output data size argument
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// so we hopefully never get here
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if (decompressedBufferSize > std::numeric_limits<int>::max()) { |
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assert(false); |
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return nullptr; |
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} |
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// The callers are deallocating using delete[]
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// thus we must allocate with new[]
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std::unique_ptr<char[]> outputBuffer(new char[decompressedBufferSize]); |
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SIZE_T decompressedDataSize = 0; |
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success = ::Decompress( |
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decompressor, |
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const_cast<char*>(input_data), |
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input_length, |
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outputBuffer.get(), |
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decompressedBufferSize, |
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&decompressedDataSize); |
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if (!success) { |
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#ifdef _DEBUG |
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std::cerr << |
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"XPRESS: Failed to decompress LastError " << |
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GetLastError() << std::endl; |
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#endif |
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return nullptr; |
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} |
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*decompress_size = static_cast<int>(decompressedDataSize); |
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// Return the raw buffer to the caller supporting the tradition
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return outputBuffer.release(); |
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} |
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} |
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} |
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} |
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#endif |
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@ -0,0 +1,26 @@ |
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// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
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// This source code is licensed under the BSD-style license found in the
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// LICENSE file in the root directory of this source tree. An additional grant
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// of patent rights can be found in the PATENTS file in the same directory.
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//
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// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file. See the AUTHORS file for names of contributors.
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#pragma once |
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#include <string> |
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namespace rocksdb { |
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namespace port { |
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namespace xpress { |
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bool Compress(const char* input, size_t length, std::string* output); |
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char* Decompress(const char* input_data, size_t input_length, |
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int* decompress_size); |
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} |
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} |
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} |
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@ -0,0 +1,17 @@ |
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// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
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// This source code is licensed under the BSD-style license found in the
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// LICENSE file in the root directory of this source tree. An additional grant
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// of patent rights can be found in the PATENTS file in the same directory.
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//
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// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file. See the AUTHORS file for names of contributors.
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#pragma once |
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// Xpress on Windows is implemeted using Win API
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#if defined(ROCKSDB_PLATFORM_POSIX) |
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#error "Xpress compression not implemented" |
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#elif defined(OS_WIN) |
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#include "port/win/xpress_win.h" |
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#endif |
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