# PR_DetachSharedMemory

Unmaps a shared memory segment identified by name.

## Syntax

```{code}
#include <prshm.h>

NSPR_API( PRStatus )
  PR_DetachSharedMemory(
     PRSharedMemory *shm,
     void  *addr
);
```

### Parameters

The function has these parameters:

shm

: The handle returned from {ref}`PR_OpenSharedMemory`.

addr

: The address to which the shared memory segment is mapped.

### Returns

{ref}`PRStatus`.