Tick Barrier

The TickBarrier is a synchronization primitive used to coordinate multiple subscribers during synchronous market data processing.

Purpose

To ensure all subscribers complete their tick before the next tick is published, enabling fully deterministic event handling.

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Interface Summary

class TickBarrier {
public:
  explicit TickBarrier(size_t total);
  void complete();
  void wait();
};

Responsibilities

• Track the number of subscribers that have completed processing
• Block until all subscribers signal completion of the current tick

Usage

Used in SyncMarketDataBus when USE_SYNC_MARKET_BUS is defined:

barrier.complete(); // Subscriber signals done
barrier.wait();     // Publisher waits for all to complete

Notes

• Thread-safe via atomic counter
• Uses spin-waiting (yield) to avoid context switches
• Should only be used in low-latency, simulation, or testing environments