[wgpu] add convience functions for deferring mapping/callbacks #8125
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kpreid
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Aug 23, 2025
Co-authored-by: Kevin Reid <[email protected]>
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Description
This adds various functions for making dealing with mapping and other callbacks easier. Often you are working with a command buffer then want to map a buffer or do something when that command buffer is submitted. Normally you need to build some kind of infrastructure for this (I have many times) but this can be really easily be done by wgpu itself for very little cost.
Testing
Told GPT-5 to put together some tests as an experiment. I think it did okay.
Squash or Rebase?
Rebase me pls
Checklist