Module dispatch_queue 

Available on crate feature dispatch only.

Grand Central Dispatch queue and synchronization wrappers. Dispatch Queue wrapper for custom queue management

This module provides a safe Rust wrapper around GCD (Grand Central Dispatch) queues that can be used with ScreenCaptureKit streams.

When to Use Custom Queues

By default, stream output handlers are called on a system-managed queue. Use a custom queue when you need:

• Priority control - Use UserInteractive QoS for low-latency UI updates
• Thread isolation - Ensure handlers run on a specific queue
• Performance tuning - Adjust queue priority based on your app’s needs

Example

use apple_cf::dispatch_queue::{dispatch_async_and_wait, DispatchQueue, DispatchQoS};

// Create a high-priority queue for frame processing
let queue = DispatchQueue::new("com.myapp.capture", DispatchQoS::UserInteractive);
dispatch_async_and_wait(&queue, || {
    // do queue-bound work here
});

Structs

DispatchGroup

Wrapper around DispatchGroup.

DispatchQueue

A wrapper around GCD DispatchQueue

DispatchSemaphore

Wrapper around DispatchSemaphore.

DispatchSource

Minimal timer-backed DispatchSource wrapper.

Enums

DispatchQoS

Quality of Service levels for dispatch queues

Functions

dispatch_apply

Run work for every iteration on queue, waiting for all iterations to finish.

dispatch_async

Submit work to queue and return immediately.

dispatch_async_and_wait

Submit work to queue and wait until it finishes.