# PR_JoinThreadPool

Waits for all threads in a thread pool to complete, then releases
resources allocated to the thread pool.

## Syntax

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

NSPR_API(PRStatus) PR_JoinThreadPool( PRThreadPool *tpool );
```

### Parameter

The function has the following parameter:

`tpool`

: A pointer to a {ref}`PRThreadPool` structure previously created by a
  call to {ref}`PR_CreateThreadPool`.

### Returns

{ref}`PRStatus`