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(This is the documentation for SDL3, which is under heavy development and the API is changing! SDL2 is the current stable version!)


Unlock the read/write lock.


int SDL_UnlockRWLock(SDL_RWLock *rwlock) SDL_RELEASE_SHARED(rwlock);

Function Parameters

rwlock the rwlock to unlock.

Return Value

Returns 0 on success or a negative error code on failure; call SDL_GetError() for more information.


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.


This function is available since SDL 3.0.0.


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