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# CMSimpleQueueGetFullness

A convenience macro that returns a queue’s fullness as a percentage of its capacity.

```
#define CMSimpleQueueGetFullness(queue)
```

## Return Value

- Returns `0.0` if the queue is empty.

## Overview

- Returns `0.5` if the queue is half full.
- Returns `1.0` if the queue is full.
- Returns `0.0` if there is an error (for example, if the queue is `NULL`).

---

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