Program Listing for File mmap.h¶
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// Copyright 2017 Kakao Corp. <http://www.kakaocorp.com>
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#pragma once
#include <unistd.h>
namespace n2 {
class Mmap {
public:
explicit Mmap(char const* fname);
~Mmap();
void Map(char const* fname);
void UnMap();
size_t QueryFileSize() const;
inline char* GetData() const { return data_; }
inline bool IsOpen() const { return file_handle_ != -1; }
inline int GetFileHandle() const { return file_handle_; }
inline size_t GetFileSize() const { return file_size_; }
private:
char* data_ = nullptr;
size_t file_size_ = 0;
int file_handle_ = -1;
};
} // namespace n2