A year ago, the pipeline newsletter had an article "Improved synchronization across GPUs and CPUs " about the ARB_sync extension. That extension was never posted, nor (as far as I can tell) was anything to take its place, either as ARB_ or EXT_.
I realize one answer is “wait until OpenGL 3.0!”, but since that needs an approved specification, stable new drivers, and an application re-write, that’s a long ways off.
Am I missing some other extension spec?
>Well, there’s this:
NVFence is an ancestor of ARB_sync and helps a bit, although it’s explicitly not cross-context like the pipeline article suggests ARB_sync is.
“ARB_sync” was started and developed against GL 2 (but not finished), then updated to incorporate the GL 3 object model, then folded into OpenGL 3 core proper. Now it is a simple matter of time and resources. Getting OpenGL 3 out has priority inside the ARB over all other matters. You’ll have to wait till OpenGL 3 to get improved fencing support, unfortunately.
Any idea when the GL3 spec will be published, barthold?