| // 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_ |