---
name: "SDL_UnlockRWLock"
section: "3"
platform: "linux"
package: "libsdl3-doc"
version: "3.2.10+ds-1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/SDL_UnlockRWLock"
---

# SDL\_UnlockRWLock(3)

Unlock the read/write lock.

## NAME

SDL\_UnlockRWLock - Unlock the read/write lock.

## HEADER FILE

Defined in SDL3/SDL\_mutex.h

## SYNOPSIS

```
#include "SDL3/SDL.h"
```

**void SDL\_UnlockRWLock(SDL\_RWLock \*rwlock);**

## DESCRIPTION

Use this function to unlock the rwlock, whether it was locked for read-only or write operations.

It is legal for the owning thread to lock an already-locked read-only lock. It must unlock it the same number of times before it is actually made available for other threads in the system (this is known as a "recursive rwlock").

It is illegal to unlock a rwlock that has not been locked by the current thread, and doing so results in undefined behavior.

## FUNCTION PARAMETERS

- *rwlock*

  the rwlock to unlock.

## AVAILABILITY

This function is available since SDL 3.2.0.

## SEE ALSO

**•**(3), [**SDL\_LockRWLockForReading**(3)](/SDL_LockRWLockForReading/3.md), **•**(3), [**SDL\_LockRWLockForWriting**(3)](/SDL_LockRWLockForWriting/3.md), **•**(3), [**SDL\_TryLockRWLockForReading**(3)](/SDL_TryLockRWLockForReading/3.md), **•**(3), [**SDL\_TryLockRWLockForWriting**(3)](/SDL_TryLockRWLockForWriting/3.md)