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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_DISK_DATA_METADATA_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_DISK_DATA_METADATA_H_
#include <stddef.h>
#include <stdint.h>
#include <memory>
#include "base/memory/raw_ptr.h"
#include "third_party/blink/renderer/platform/platform_export.h"
namespace blink {
class DiskDataAllocator;
class PLATFORM_EXPORT DiskDataMetadata {
public:
int64_t start_offset() const { return start_offset_; }
size_t size() const { return size_; }
private:
DiskDataMetadata(int64_t start_offset, size_t size)
: start_offset_(start_offset), size_(size) {}
DiskDataMetadata(const DiskDataMetadata& other) = default;
DiskDataMetadata(DiskDataMetadata&& other) = default;
DiskDataMetadata& operator=(const DiskDataMetadata& other) = default;
int64_t start_offset_;
size_t size_;
friend class DiskDataAllocator;
};
class PLATFORM_EXPORT ReservedChunk {
public:
ReservedChunk(DiskDataAllocator* allocator,
std::unique_ptr<DiskDataMetadata> metadata);
ReservedChunk(const ReservedChunk&) = delete;
ReservedChunk& operator=(const ReservedChunk&) = delete;
~ReservedChunk();
std::unique_ptr<DiskDataMetadata> Take();
private:
raw_ptr<DiskDataAllocator> allocator_;
std::unique_ptr<DiskDataMetadata> metadata_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_DISK_DATA_METADATA_H_
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