[Haskell-cafe] Loading a texture in OpenGL

Ben Lippmeier benl at ouroborus.net
Tue Feb 7 04:56:08 CET 2012

On 07/02/2012, at 2:50 PM, Clark Gaebel wrote:

> I would be running the GC manually at key points to make sure it gets cleaned up. Mainly, before any scene changes when basically everything gets thrown out anyways.

From the docs:

newForeignPtr :: FinalizerPtr a -> Ptr a -> IO (ForeignPtr a)Source
Turns a plain memory reference into a foreign pointer, and associates a finalizer with the reference. The finalizer will be executed after the last reference to the foreign object is dropped. There is no guarantee of promptness, however the finalizer will be executed before the program exits.

"No guarantee of promptness". Even if the GC knows your pointer is unreachable, it might choose not to call the finaliser. I think people have been bitten by this before.


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