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# XTaskQueueMonitorCallback

> XTaskQueueMonitorCallback

# XTaskQueueMonitorCallback

A callback that is invoked by the task queue whenever a task is submitted for execution.

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## Syntax

```cpp theme={null}
void XTaskQueueMonitorCallback(  
         void* context,  
         XTaskQueueHandle queue,  
         XTaskQueuePort port  
)  
```

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### Parameters

*context*   \_In\_opt\_\
Type: void\*

A context pointer that was passed to [XTaskQueueRegisterMonitor](/reference/system/xtaskqueue/functions/xtaskqueueregistermonitor).

*queue*   \_In\_\
Type: XTaskQueueHandle

The task queue to which the task was submitted.

*port*   \_In\_\
Type: [XTaskQueuePort](/reference/system/xtaskqueue/enums/xtaskqueueport)

The port to which the task was submitted.

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### Return value

Type: void

None.

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## Remarks

`XTaskQueueMonitorCallback` represents a callback intended for use with the [XTaskQueueRegisterMonitor](/reference/system/xtaskqueue/functions/xtaskqueueregistermonitor) function. If an `XTaskQueueMonitorCallback` callback is registered with a task queue, this callback is invoked whenever a task is submitted to a task queue by either [XTaskQueueSubmitCallback](/reference/system/xtaskqueue/functions/xtaskqueuesubmitcallback) or [XTaskQueueSubmitDelayedCallback](/reference/system/xtaskqueue/functions/xtaskqueuesubmitdelayedcallback). For more information about implementing an `XTaskQueueMonitorCallback` callback, see [How to: Using events to control manual queue dispatching](/build/core-features/common/async/async-task-queue-design-howto/control-manual-queue-dispatching).

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## Requirements

**Header:** XTaskQueue.h

**Library:** xgameruntime.lib

**Supported platforms:** Windows, XBOX One family consoles and XBOX Series consoles

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## See also

[Asynchronous Programming Model](/build/core-features/common/async/async-programming-model)\
[Async Task Queue Design](/build/core-features/common/async/async-task-queue-design)\
[XTaskQueue Library Overview](/build/core-features/common/async/async-libraries/async-library-xtaskqueue)\
[XTaskQueue members](/reference/system/xtaskqueue/xtaskqueue_members)


## Related topics

- [XTaskQueueUnregisterMonitor](/reference/system/xtaskqueue/functions/xtaskqueueunregistermonitor.md)
- [XTaskQueueRegisterMonitor](/reference/system/xtaskqueue/functions/xtaskqueueregistermonitor.md)
- [XTaskQueueTerminatedCallback](/reference/system/xtaskqueue/functions/xtaskqueueterminatedcallback.md)
- [XTaskQueuePort](/reference/system/xtaskqueue/enums/xtaskqueueport.md)
- [XTaskQueue](/reference/system/xtaskqueue/xtaskqueue_members.md)