# OS_EnableFunctionCost

## C Specification

  `#include <nitro/os.h>`
  `BOOL OS_EnableFunctionCost( void );`

## Arguments

None.

## Return Values

The status before this function was called. TRUE indicates that it was enabled. FALSE indicates that it was disabled.

## Description

This function enables the function cost calculation feature.

This switch decides whether the function entry and exit (`__PROFILE_ENTRY`, `__PROFILE_EXIT`) that are inserted by the `profile` feature will become enabled. Therefore take note of how you time enable/disable switching. For example, if you call a function called `test()` when in disabled status, and then enable from within the `test()` function, consistency will not be possible because it will only store information at `__PROFILE_EXIT`, even though nothing was done at the function entry (`__PROFILE_ENTRY`).

Enable/disable switches are set for each call calculation buffer. Therefore one will not disable all.

If this function is compiled for debugging, it will function properly. However, if compiled for the final ROM version (`FINALROM`) library, it will not do anything.

## See Also

`OS_InitFunctionCost, OS_DisableFunctionCost, OS_RestoreFunctionCost
`

## Revision History

05/18/2004 Initial Version

CONFIDENTIAL