---
title: dispatch_get_global_queue
framework: dispatch
role: symbol
role_heading: Function
path: dispatch/dispatch_get_global_queue
---

# dispatch_get_global_queue

Returns a system-defined global concurrent queue with the specified quality-of-service class.

## Declaration

```occ
extern dispatch_queue_global_tdispatch_get_global_queue(intptr_t identifier, uintptr_t flags);
```

## Parameters

- `identifier`: The quality of service you want to give to tasks executed using this queue. Quality-of-service helps determine the priority given to tasks executed by the queue. You may specify the values QOS_CLASS_USER_INTERACTIVE, QOS_CLASS_USER_INITIATED, QOS_CLASS_UTILITY, or QOS_CLASS_BACKGROUND. Queues that handle user-interactive or user-initiated tasks have a higher priority than tasks meant to run in the background. In OS X 10.9 or earlier, you can specify one of the dispatch queue priority values, which are found in doc://com.apple.dispatch/documentation/Dispatch/dispatch_queue_priority_t. These values map to an appropriate quality-of-service class.
- `flags`: Flags that are reserved for future use. Always specify 0 for this parameter.

## Return Value

Return Value The requested global concurrent queue.

## Discussion

Discussion This function returns a queue suitable for executing tasks with the specified quality-of-service level. Calls to the suspend(), resume(), and dispatch_set_context functions have no effect on the returned queues. Tasks submitted to the returned queue are scheduled concurrently with respect to one another.

## See Also

### Queues and Tasks

- [dispatch_get_main_queue](dispatch/dispatch_get_main_queue.md)
- [Dispatch Queue](dispatch/dispatch-queue.md)
- [Dispatch Work Item](dispatch/dispatch-work-item.md)
- [Dispatch Group](dispatch/dispatch-group.md)
- [Workloop](dispatch/workloop.md)