c10::KernelFunction (#26337)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/26337
- Factor out boxing and unboxing functionality from the c10 dispatcher into a c10::KernelFunction class
- Move that class and everything else it depends on into ATen/core/boxing
- This also allows us to get rid of c10::KernelCache. Instead, we now store a pointer to the unboxed functor in c10::KernelFunction.
- We're also getting rid of the DispatchTableEntry struct and instead store KernelFunction directly.
- To make this work, we need to change the dispatcher calling API from Dispatcher::lookup().callBoxed/callUnboxed and OperatorEntry::lookup().callBoxed/callUnboxed to Dispatcher::callBoxed/callUnboxed and OperatorEntry::callBoxed/callUnboxed.
ghstack-source-id: 90459911
Test Plan: unit tests
Differential Revision: D17416607
fbshipit-source-id: fd221f1d70eb3f1b4d33092eaa7e37d25684c934
