Type Alias SDL_CleanupPropertyCallback 

pub type SDL_CleanupPropertyCallback = Option<unsafe extern "C" fn(userdata: *mut c_void, value: *mut c_void)>;

A callback used to free resources when a property is deleted.

This should release any resources associated with value that are no longer needed.

This callback is set per-property. Different properties in the same group can have different cleanup callbacks.

This callback will be called during SDL_SetPointerPropertyWithCleanup if the function fails for any reason.

Parameters

• userdata: an app-defined pointer passed to the callback.
• value: the pointer assigned to the property to clean up.

Thread safety

This callback may fire without any locks held; if this is a concern, the app should provide its own locking.

Availability

This datatype is available since SDL 3.2.0.

See also

• SDL_SetPointerPropertyWithCleanup

Aliased Type

pub enum SDL_CleanupPropertyCallback {
    None,
    Some(unsafe extern "C" fn(*mut c_void, *mut c_void)),
}

Variants

None

No value.

Some(unsafe extern "C" fn(*mut c_void, *mut c_void))

Some value of type T.