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mapping.h
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mapping.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_FML_MAPPING_H_
#define FLUTTER_FML_MAPPING_H_
#include <initializer_list>
#include <memory>
#include <string>
#include <vector>
#include "flutter/fml/build_config.h"
#include "flutter/fml/file.h"
#include "flutter/fml/macros.h"
#include "flutter/fml/native_library.h"
#include "flutter/fml/unique_fd.h"
namespace fml {
class Mapping {
public:
Mapping();
virtual ~Mapping();
virtual size_t GetSize() const = 0;
virtual const uint8_t* GetMapping() const = 0;
private:
FML_DISALLOW_COPY_AND_ASSIGN(Mapping);
};
class FileMapping final : public Mapping {
public:
enum class Protection {
kRead,
kWrite,
kExecute,
};
FileMapping(const fml::UniqueFD& fd,
std::initializer_list<Protection> protection = {
Protection::kRead});
~FileMapping() override;
static std::unique_ptr<FileMapping> CreateReadOnly(const std::string& path);
static std::unique_ptr<FileMapping> CreateReadOnly(
const fml::UniqueFD& base_fd,
const std::string& sub_path = "");
static std::unique_ptr<FileMapping> CreateReadExecute(
const std::string& path);
static std::unique_ptr<FileMapping> CreateReadExecute(
const fml::UniqueFD& base_fd,
const std::string& sub_path = "");
// |Mapping|
size_t GetSize() const override;
// |Mapping|
const uint8_t* GetMapping() const override;
uint8_t* GetMutableMapping();
private:
size_t size_ = 0;
uint8_t* mapping_ = nullptr;
uint8_t* mutable_mapping_ = nullptr;
#if OS_WIN
fml::UniqueFD mapping_handle_;
#endif
FML_DISALLOW_COPY_AND_ASSIGN(FileMapping);
};
class DataMapping final : public Mapping {
public:
DataMapping(std::vector<uint8_t> data);
~DataMapping() override;
// |Mapping|
size_t GetSize() const override;
// |Mapping|
const uint8_t* GetMapping() const override;
private:
std::vector<uint8_t> data_;
FML_DISALLOW_COPY_AND_ASSIGN(DataMapping);
};
class NonOwnedMapping final : public Mapping {
public:
NonOwnedMapping(const uint8_t* data, size_t size)
: data_(data), size_(size) {}
// |Mapping|
size_t GetSize() const override;
// |Mapping|
const uint8_t* GetMapping() const override;
private:
const uint8_t* const data_;
const size_t size_;
FML_DISALLOW_COPY_AND_ASSIGN(NonOwnedMapping);
};
class SymbolMapping final : public Mapping {
public:
SymbolMapping(fml::RefPtr<fml::NativeLibrary> native_library,
const char* symbol_name);
~SymbolMapping() override;
// |Mapping|
size_t GetSize() const override;
// |Mapping|
const uint8_t* GetMapping() const override;
private:
fml::RefPtr<fml::NativeLibrary> native_library_;
const uint8_t* mapping_ = nullptr;
FML_DISALLOW_COPY_AND_ASSIGN(SymbolMapping);
};
} // namespace fml
#endif // FLUTTER_FML_MAPPING_H_