Module backpressure 

Backpressure and flow control utilities.

This module provides utilities for managing data flow between producers and consumers with backpressure.

Overview

The Backpressure controller provides two complementary mechanisms:

1. Buffer size tracking: Track how much data is buffered and block when full. Use try_acquire, acquire, and release for this.

2. Concurrent operation limiting: Limit the number of concurrent operations using semaphore-based permits. Use try_acquire_permit and acquire_permit for this.

Structs

Backpressure

A backpressure controller for limiting data flow and concurrent operations.

RateLimiter

A rate limiter for controlling operation frequency.

TokenBucket

A token bucket for rate limiting with bursts.