6c6380969b
1. replace all boost::shared_ptr to std::shared_ptr 2. replace all boost::scopted_ptr to std::unique_ptr 3. replace all boost::scoped_array to std::unique<T[]> 4. replace all boost:thread to std::thread
54 lines
1.9 KiB
C++
54 lines
1.9 KiB
C++
// Licensed to the Apache Software Foundation (ASF) under one
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// or more contributor license agreements. See the NOTICE file
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// distributed with this work for additional information
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// regarding copyright ownership. The ASF licenses this file
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// to you under the Apache License, Version 2.0 (the
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// "License"); you may not use this file except in compliance
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// with the License. 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,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations
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// under the License.
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#pragma once
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#include <stdint.h>
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#include <memory>
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#include "common/status.h"
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namespace doris {
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class FileReader {
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public:
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virtual ~FileReader() {}
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virtual Status open() = 0;
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// Read content to 'buf', 'buf_len' is the max size of this buffer.
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// Return ok when read success, and 'bytes_read' is set to size of read content
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// If reach to end of file, the eof is set to true. meanwhile 'bytes_read'
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// is set to zero.
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virtual Status read(uint8_t* buf, int64_t buf_len, int64_t* bytes_read, bool* eof) = 0;
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virtual Status readat(int64_t position, int64_t nbytes, int64_t* bytes_read, void* out) = 0;
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/**
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* This interface is used read a whole message, For example: read a message from kafka.
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*
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* if read eof then return Status::OK and length is set 0 and buf is set nullptr,
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* other return readed bytes.
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*/
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virtual Status read_one_message(std::unique_ptr<uint8_t[]>* buf, int64_t* length) = 0;
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virtual int64_t size() = 0;
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virtual Status seek(int64_t position) = 0;
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virtual Status tell(int64_t* position) = 0;
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virtual void close() = 0;
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virtual bool closed() = 0;
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};
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} // namespace doris
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