[NFCI][SYCL] Refactor HandlerAccess::postProcess
#19203
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Implements the idea from the earlier TODO comment. Instead of having a hacky `handler::MLastEvent` just `swap` original and post-processing `handler`, so that "natural" `finalize` will work on the latest task in the chain.
aelovikov-intel
commented
Jun 27, 2025
| // Reductions implementation need access to private members of handler. Those | ||
| // are limited to those below. | ||
| inline void finalizeHandler(handler &CGH); | ||
| template <class FunctorTy> void withAuxHandler(handler &CGH, FunctorTy Func); |
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withAuxHandler declaration should have been removed earlier when postProcess was introduced instead of it.
| @@ -488,6 +488,9 @@ class __SYCL_EXPORT handler { | |||
| /// \param Graph is a SYCL command_graph | |||
| handler(std::shared_ptr<ext::oneapi::experimental::detail::graph_impl> Graph); | |||
| #endif | |||
| handler(std::unique_ptr<detail::handler_impl> &&HandlerImpl); | |||
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| ~handler(); | |||
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std::unique_ptr<T> dtor needs a complete T, so move the definition to the handler.cpp.
| @@ -577,11 +571,10 @@ event handler::finalize() { | |||
| DiscardEvent = !KernelUsesAssert; | |||
| } | |||
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| #ifdef __INTEL_PREVIEW_BREAKING_CHANGES | |||
| if (!DiscardEvent) { | |||
| LastEventImpl = detail::event_impl::create_completed_host_event(); | |||
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No idea why we were using create_completed_host_event before. @slawekptak , any thoughts?
| @@ -635,29 +627,32 @@ event handler::finalize() { | |||
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| if (DiscardEvent) { | |||
| EnqueueKernel(); | |||
| #ifndef __INTEL_PREVIEW_BREAKING_CHANGES | |||
| LastEventImpl->setStateDiscarded(); | |||
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Line 654 on the right does create_discarded_event instead, which, IMO, is even more readable.
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Implements the idea from the earlier TODO comment. Instead of having a hacky
handler::MLastEventjustswaporiginal and post-processinghandler, so that "natural"finalizewill work on the latest task in the chain.