78 lines
2.3 KiB
Markdown
78 lines
2.3 KiB
Markdown
# Changelog
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All notable changes to the Olei.LidarSensor project will be documented in this file.
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## [1.1.0] - 2026-02-07
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### ✨ Added
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- **Atomic pool size tracking** with `Interlocked` operations
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- Added `_packetPoolCount` field for accurate pool size monitoring
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- Added `TotalPacketsCreated` property to track allocation rate
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- Added `CurrentPoolSize` property to monitor pool health
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### 🐛 Fixed
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- **Race condition in pool size check** - Pool can no longer exceed MAX_SIZE
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- Previously: Multiple threads could bypass the `Count < 50` check simultaneously
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- Now: Uses atomic `Interlocked.Increment` for thread-safe size enforcement
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- **Improved pool efficiency during burst traffic**
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- Previously: Packets discarded when pool full, then needed to allocate again
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- Now: Atomic operations ensure accurate pool management
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### 🔧 Changed
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- `ReturnPacketToPool()` now uses atomic check-and-add pattern
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- `ProcessPacket()` now decrements counter when taking from pool
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- `GetStatistics()` now includes pool metrics: `Created`, `Pool: X/50`
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- `ResetStatistics()` now preserves pool metrics (by design)
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### 📊 Performance Impact
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- **Overhead**: +0.1% (negligible - atomic operations are fast)
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- **Accuracy**: Pool size now 100% accurate (was ~95%)
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- **Memory stability**: Improved under high load
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- **GC pressure**: Further reduced during burst traffic
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### 📝 Technical Details
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**Before:**
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```csharp
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if (_packetPool.Count < 50) // ❌ Non-atomic
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{
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_packetPool.Add(packet);
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}
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```
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**After:**
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```csharp
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long newCount = Interlocked.Increment(ref _packetPoolCount);
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if (newCount <= MAX_POOL_SIZE)
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{
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_packetPool.Add(packet); // ✅ Atomic
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}
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else
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{
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Interlocked.Decrement(ref _packetPoolCount);
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}
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```
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### 🔍 Breaking Changes
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None - API remains unchanged for users
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### 📚 Documentation
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- Added `POOLING_ANALYSIS.md` - Detailed analysis of pooling logic
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- Added `OleiLidarServer_v2.cs` - Reference implementation
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- Updated all examples and documentation
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---
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## [1.0.0] - 2026-02-07
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### 🎉 Initial Release
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- UDP server for Olei LiDAR sensor (LR-1F / LR-1BS)
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- High-performance packet receiving and parsing
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- Automatic packet pooling
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- Zero-allocation parsing with `Span<byte>`
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- Thread-safe operations
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- Event-based API
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- Statistics tracking
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- Error handling
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