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// Copyright (c) 2012 The Chromium 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 CONTENT_BROWSER_FILE_DESCRIPTOR_INFO_IMPL_H_
#define CONTENT_BROWSER_FILE_DESCRIPTOR_INFO_IMPL_H_
#include <stddef.h>
#include <map>
#include <memory>
#include <vector>
#include "base/files/memory_mapped_file.h"
#include "content/common/content_export.h"
#include "content/public/browser/posix_file_descriptor_info.h"
namespace content {
class PosixFileDescriptorInfoImpl : public PosixFileDescriptorInfo {
public:
CONTENT_EXPORT static std::unique_ptr<PosixFileDescriptorInfo> Create();
~PosixFileDescriptorInfoImpl() override;
void Share(int id, base::PlatformFile fd) override;
void ShareWithRegion(int id,
base::PlatformFile fd,
const base::MemoryMappedFile::Region& region) override;
void Transfer(int id, base::ScopedFD fd) override;
const base::FileHandleMappingVector& GetMapping() override;
base::FileHandleMappingVector GetMappingWithIDAdjustment(int delta) override;
base::PlatformFile GetFDAt(size_t i) override;
int GetIDAt(size_t i) override;
const base::MemoryMappedFile::Region& GetRegionAt(size_t i) override;
size_t GetMappingSize() override;
bool OwnsFD(base::PlatformFile file) override;
base::ScopedFD ReleaseFD(base::PlatformFile file) override;
private:
PosixFileDescriptorInfoImpl();
void AddToMapping(int id,
base::PlatformFile fd,
const base::MemoryMappedFile::Region& region);
bool HasID(int id) const;
base::FileHandleMappingVector mapping_;
// Maps the ID of a FD to the region to use for that FD, the whole file if not
// in the map.
std::map<int, base::MemoryMappedFile::Region> ids_to_regions_;
std::vector<base::ScopedFD> owned_descriptors_;
};
} // namespace content
#endif // CONTENT_BROWSER_FILE_DESCRIPTOR_INFO_IMPL_H_
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