mmap_file.h

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// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
 
#ifndef FLUTTER_TOOLS_LICENSES_CPP_SRC_MMAP_FILE_H_
#define FLUTTER_TOOLS_LICENSES_CPP_SRC_MMAP_FILE_H_
 
#include <string_view>
#include "third_party/abseil-cpp/absl/status/statusor.h"
 
/// A memory mapped file.
class MMapFile {
 public:
  static absl::StatusOr<MMapFile> Make(std::string_view path);
 
  ~MMapFile();
 
  MMapFile(const MMapFile&) = delete;
  MMapFile& operator=(const MMapFile&) = delete;
 
  MMapFile(MMapFile&& other);
 
  const char* GetData() const { return data_; }
 
  size_t GetSize() const { return size_; }
 
 private:
  MMapFile(int fd, const char* data, size_t size);
 
  int fd_ = -1;
  const char* data_ = nullptr;
  size_t size_ = 0;
};
 
#endif  // FLUTTER_TOOLS_LICENSES_CPP_SRC_MMAP_FILE_H_