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# PR_NewLock
Creates a new lock.
## Syntax
```{code}
#include <prlock.h>
PRLock* PR_NewLock(void);
```
### Returns
The function returns one of the following values:
- If successful, a pointer to the new lock object.
- If unsuccessful (for example, the lock cannot be created because of
resource constraints), `NULL`.
## Description
{ref}`PR_NewLock` creates a new opaque lock.