pr_newcondvar.md - mozsearch

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# PR_NewCondVar

Creates a new condition variable.

## Syntax

```{code}

#include <prcvar.h>

PRCondVar* PR_NewCondVar(PRLock *lock);

```

### Parameter

{ref}`PR_NewCondVar` has one parameter:

`lock`

: The identity of the mutex that protects the monitored data, including

  this condition variable.

### Returns

The function returns one of the following values:

- If successful, a pointer to the new condition variable object.

- If unsuccessful (for example, if system resources are unavailable),

  `NULL`.