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# os_activity_apply_f

Execute a function using a given activity object.

```
extern void os_activity_apply_f(os_activity_t activity, void *context, os_function_t function);
```

## Parameters

`activity`

An activity object.

    You can alternatively pass one of the global activity constants, such as [`OS_ACTIVITY_NONE`](/documentation/os/OS_ACTIVITY_NONE)     or [`OS_ACTIVITY_CURRENT`](/documentation/os/OS_ACTIVITY_CURRENT)    .

`context`

A context to pass to the function. This may be `NULL`.

`function`

A function to call within the context of the given activity. This function must match the signature defined by [`os_function_t`](/documentation/os/os_function_t).

## Discussion

---

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