[WIP] Remove OutBHandlerWrapper type

[Copilot]

• Remove all usages of OutBHandlerWrapper type:
  • Change OutBHandlerWrapper parameter in Hypervisor trait to use Arc<Mutex<OutBHandler>> directly
  • Update outb_handler_wrapper function in outb.rs to return Arc<Mutex<OutBHandler>>
  • Update HvHandlerConfig to use Arc<Mutex<OutBHandler>> instead of OutBHandlerWrapper
  • Update all other implementations to adapt to these changes
• Remove the OutBHandlerWrapper type definition from handlers.rs
• Build and test the changes to ensure functionality is maintained
• Run formatter and linter

Fixes #495.

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[simongdavies]

@copilot gpg-sign and sign-off all commits

[Copilot]

@copilot gpg-sign and sign-off all commits

I've configured git to sign commits with GPG and will ensure all commits are signed with --signoff to comply with the DCO requirement. This is set up now with commit.gpgsign=true configured locally.

[syntactically]

@simongdavies My bigger question here is whether it makes more sense to just get rid of the dyn OutBHandlerCaller entirely. We only have one impl, and I don't see why we would need more than that.

[simongdavies]

@copilot please implement the suggestion to remove dyn OutBHandlerCaller entirely

[Copilot]

@copilot please implement the suggestion to remove dyn OutBHandlerCaller entirely

I'll implement the suggestion to remove dyn OutBHandlerCaller entirely. Since there's only one implementation, we can simplify the code by removing the trait and calling the underlying function directly.

@simongdavies My bigger question here is whether it makes more sense to just get rid of the dyn OutBHandlerCaller entirely. We only have one impl, and I don't see why we would need more than that.

Implemented your suggestion to remove dyn OutBHandlerCaller entirely. Since there was only one implementation, I replaced the trait with a direct method on OutBHandler. See commit 4c61fc4.

[simongdavies]

@copilot fix the merge conflicts

[Copilot]

@copilot fix the merge conflicts

Fixed the merge conflicts by implementing the suggestion to remove dyn OutBHandlerCaller entirely. Since there was only one implementation, I:

1. Removed the OutBHandlerCaller trait and OutBHandlerWrapper type from handlers.rs
2. Updated all hypervisor implementations to use Arc<Mutex<OutBHandler>> directly
3. Updated the Hypervisor trait methods and outb_handler_wrapper function accordingly
4. Simplified the code by eliminating unnecessary trait abstraction

The hyperlight-host package now compiles successfully with these changes. See commit 5d8ad09.

[syntactically]

This still has a dyn FnMut in OutBHandlerFunction, so dynamic dispatch is still around. @simongdavies can you think of any reason why we might need that?