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# PR_CloseFileMap
Closes a file mapping.
## Syntax
```{code}
#include <prio.h>
PRStatus PR_CloseFileMap(PRFileMap *fmap);
```
### Parameter
The function has the following parameter:
`fmap`
: The file mapping to be closed.
### Returns
The function returns one of the following values:
- If the memory region is successfully unmapped, `PR_SUCCESS`.
- If the memory region is not successfully unmapped, `PR_FAILURE`.
The error code can be retrieved via {ref}`PR_GetError`.
## Description
When a file mapping created with a call to {ref}`PR_CreateFileMap` is no
longer needed, it should be closed with a call to {ref}`PR_CloseFileMap`.