arrow/util/type_fwd.h

0001 // Licensed to the Apache Software Foundation (ASF) under one
0002 // or more contributor license agreements.  See the NOTICE file
0003 // distributed with this work for additional information
0004 // regarding copyright ownership.  The ASF licenses this file
0005 // to you under the Apache License, Version 2.0 (the
0006 // "License"); you may not use this file except in compliance
0007 // with the License.  You may obtain a copy of the License at
0008 //
0009 //   http://www.apache.org/licenses/LICENSE-2.0
0010 //
0011 // Unless required by applicable law or agreed to in writing,
0012 // software distributed under the License is distributed on an
0013 // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
0014 // KIND, either express or implied.  See the License for the
0015 // specific language governing permissions and limitations
0016 // under the License.
0017
0018 #pragma once
0019
0020 namespace arrow {
0021
0022 namespace internal {
0023 struct Empty;
0024 }  // namespace internal
0025
0026 template <typename T = internal::Empty>
0027 class WeakFuture;
0028 class FutureWaiter;
0029
0030 class TimestampParser;
0031
0032 namespace internal {
0033
0034 class Executor;
0035 class TaskGroup;
0036 class ThreadPool;
0037 class CpuInfo;
0038
0039 namespace tracing {
0040
0041 struct Scope;
0042
0043 }  // namespace tracing
0044 }  // namespace internal
0045
0046 struct Compression {
0047   /// \brief Compression algorithm
0048   enum type {
0049     UNCOMPRESSED,
0050     SNAPPY,
0051     GZIP,
0052     BROTLI,
0053     ZSTD,
0054     LZ4,
0055     LZ4_FRAME,
0056     LZO,
0057     BZ2,
0058     LZ4_HADOOP
0059   };
0060 };
0061
0062 namespace util {
0063 class AsyncTaskScheduler;
0064 class Compressor;
0065 class Decompressor;
0066 class Codec;
0067 class Uri;
0068 }  // namespace util
0069
0070 }  // namespace arrow