64 lines
2.0 KiB
C
64 lines
2.0 KiB
C
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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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//
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#ifndef STORAGE_LEVELDB_UTIL_STORAGE_OPTIONS_H_
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#define STORAGE_LEVELDB_UTIL_STORAGE_OPTIONS_H_
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#include <string>
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#include <stdint.h>
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#include "leveldb/env.h"
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#include "leveldb/options.h"
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namespace leveldb {
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// Environment Options that are used to read files from storage
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class StorageOptions : public EnvOptions {
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public:
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/* implicit */ StorageOptions(const Options& opt) :
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data_in_os_(opt.allow_os_buffer),
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fs_readahead_(opt.allow_readahead),
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readahead_compactions_(opt.allow_readahead_compactions),
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use_mmap_reads_(opt.allow_mmap_reads),
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use_mmap_writes_(opt.allow_mmap_writes) {
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}
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// copy constructor with readaheads set to readahead_compactions_
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StorageOptions(const StorageOptions& opt) {
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data_in_os_ = opt.UseOsBuffer();
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fs_readahead_ = opt.UseReadaheadCompactions();
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readahead_compactions_ = opt.UseReadaheadCompactions();
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use_mmap_reads_ = opt.UseMmapReads();
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use_mmap_writes_ = opt.UseMmapWrites();
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}
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// constructor with default options
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StorageOptions() {
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Options opt;
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data_in_os_ = opt.allow_os_buffer;
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fs_readahead_ = opt.allow_readahead;
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readahead_compactions_ = fs_readahead_;
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use_mmap_reads_ = opt.allow_mmap_reads;
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use_mmap_writes_ = opt.allow_mmap_writes;
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}
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virtual ~StorageOptions() {}
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bool UseOsBuffer() const { return data_in_os_; };
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bool UseReadahead() const { return fs_readahead_; };
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bool UseMmapReads() const { return use_mmap_reads_; }
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bool UseMmapWrites() const { return use_mmap_writes_; }
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bool UseReadaheadCompactions() const { return readahead_compactions_;}
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private:
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bool data_in_os_;
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bool fs_readahead_;
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bool readahead_compactions_;
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bool use_mmap_reads_;
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bool use_mmap_writes_;
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};
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} // namespace leveldb
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#endif // STORAGE_LEVELDB_UTIL_STORAGE_OPTIONS_H_
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