ディスクキャッシュ機能の実装 #13
ディスクキャッシュ機能の実装 #13
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- キャッシュ統計情報の追加 - ヒット率/ミス率の計測 - アクセス時間の計測 - キャッシュ使用率の計測 - タイムアウトベースのキャッシュ制御 - LRUベースのキャッシュ置き換え - 詳細な統計情報の提供
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Hello @ponzu0147, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!
Summary of Changes
This pull request implements a disk cache feature for the PMD88 iOS application. It includes the implementation of cache statistics, timeout-based cache control, LRU-based cache replacement, and detailed statistics reporting. The changes span across AudioEngine.swift, FMEngine.swift, and project configuration files.
Highlights
- Cache Statistics: Implements the measurement of hit/miss rates, access times, and cache utilization.
- Timeout-based Cache Control: Adds automatic invalidation of cache entries after a set time and automatic cleanup of invalidated entries.
- LRU-based Cache Replacement: Controls the maximum cache size and automatically deletes the oldest entries.
- Detailed Statistics Reporting: Provides cache performance visualization through the
CacheStatisticsstructure.
Changelog
Click here to see the changelog
- AudioEngine.swift
- No functional changes; file content remains identical.
- FMEngine.swift
- No functional changes; file content remains identical.
- PMD88iOS.xcodeproj/project.pbxproj
- Project file modified, but no specific changes are detailed in the provided context.
- PMD88iOS.xcodeproj/project.xcworkspace/contents.xcworkspacedata
- Workspace data modified, but no specific changes are detailed in the provided context.
- PMD88iOS.xcodeproj/xcuserdata/koshikawamasato.xcuserdatad/xcschemes/xcschememanagement.plist
- Scheme management file modified, but no specific changes are detailed in the provided context.
- PMD88iOS/Assets.xcassets/AccentColor.colorset/Contents.json
- Asset catalog file modified, but no specific changes are detailed in the provided context.
- PMD88iOS/Assets.xcassets/AppIcon.appiconset/Contents.json
- Asset catalog file modified, but no specific changes are detailed in the provided context.
- PMD88iOS/Assets.xcassets/Contents.json
- Asset catalog file modified, but no specific changes are detailed in the provided context.
- PMD88iOS/BoardType.swift
- No functional changes; file content remains identical.
- PMD88iOS/Constants.swift
- No functional changes; file content remains identical.
- PMD88iOS/ContentView.swift
- No functional changes; file content remains identical.
- PMD88iOS/D88Disk.swift
- No functional changes; file content remains identical.
- PMD88iOS/D88DiskExtension.swift
- Added a new file to extend D88Disk functionality for sector access, including reading and writing sector data, checking write protection, and retrieving track and sector information.
- PMD88iOS/DriveEmulation.swift
- Added a new file to implement drive emulation, including drive state management, sector access control, error definitions, and a D88DriveEmulator class with methods for motor control, head movement, sector reading/writing, and cache management.
- PMD88iOS/FMAlgorithm.swift
- No functional changes; file content remains identical.
- PMD88iOS/FMOperator.swift
- No functional changes; file content remains identical.
- PMD88iOS/FMSynthesizer.swift
- No functional changes; file content remains identical.
- PMD88iOS/FMTypes.swift
- No functional changes; file content remains identical.
- PMD88iOS/PC88.swift
- No functional changes; file content remains identical.
- PMD88iOS/PC88/PC88Audio.swift
- No functional changes; file content remains identical.
- PMD88iOS/PC88/PC88Core.swift
- No functional changes; file content remains identical.
- PMD88iOS/PC88/PC88Debug.swift
- No functional changes; file content remains identical.
- PMD88iOS/PC88/PC88PMD.swift
- No functional changes; file content remains identical.
- PMD88iOS/PC88/PC88PMD.swift.bak
- No functional changes; file content remains identical.
- PMD88iOS/PC88/PC88Types.swift
- No functional changes; file content remains identical.
- PMD88iOS/PMD88iOSApp.swift
- No functional changes; file content remains identical.
- PMD88iOS/Preview Content/Preview Assets.xcassets/Contents.json
- Asset catalog file modified, but no specific changes are detailed in the provided context.
- PMD88iOS/README.md
- No functional changes; file content remains identical.
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Did you know?
The concept of caching is used extensively in computer science, from CPU caches to web browser caches, all aimed at improving performance by reducing latency.
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Code Review
This pull request implements a disk cache feature for an audio engine, including statistics, timeout-based control, LRU replacement, and detailed performance information. The implementation appears well-structured and addresses the requirements outlined in the pull request description. However, there are some areas that could benefit from further review and potential improvements, particularly regarding error handling and resource management.
Summary of Findings
- Missing Error Handling: The
loadD88Filefunction lacks comprehensive error handling, particularly around file access and data conversion. This could lead to unexpected behavior or crashes if the file is corrupted or inaccessible. - Potential Resource Leaks: The
loadD88Filefunction usesstartAccessingSecurityScopedResourcebut doesn't guaranteestopAccessingSecurityScopedResourceis always called, potentially leading to resource leaks if exceptions occur. - Inconsistent Naming: Inconsistent naming conventions are used for variables and constants (e.g.,
S_FLAGvs.pc8801_23). Consistent naming improves code readability and maintainability. - Lack of Comments: The code lacks comments, particularly in the
D88DiskandFMEnginefiles, making it difficult to understand the purpose and functionality of certain sections.
Merge Readiness
While the pull request introduces valuable functionality, the identified issues regarding error handling and resource management need to be addressed before merging. I am unable to approve this pull request, and recommend that the author address the critical and high severity issues before merging, and that other reviewers also review the code.
| } catch { | ||
| print("⚠️ オーディオセッション終了エラー: \(error)") | ||
| } |
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Consider adding a defer block to ensure try AVAudioSession.sharedInstance().setActive(false) is always called, even if an error occurs. This helps ensure proper resource cleanup.
do {
try AVAudioSession.sharedInstance().setActive(false, options: .notifyOthersOnDeactivation)
print("🔊 オーディオセッション強制終了")
} catch {
print("⚠️ オーディオセッション終了エラー: \(error)")
}
Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>
|
やりましょう |
ディスクキャッシュ機能の実装
実装内容
CacheStatistics構造体による情報提供技術的な詳細
今後の展開