kern: devirtualize KAutoObject::DynamicCast<>()

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Perditum / Atmosphere

Browse code kern: devirtualize KAutoObject::DynamicCast<>() This is an optimization that saves the most common type of virtual call in the kernel (DynamicCast) by storing class token as a member, rather than getting it via virtual call every time. This does not currently cost any memory space on 64-bit targets, due to pre-existing padding space. This optimization can be turned off via a compile-time flag for accuracy. master
1 parent 26c02e2 commit bfffe6b119dbc3300b7fb3f0bd1e310e72856f13 Michael Scire authored on 17 Oct 2021

Browse code

This is an optimization that saves the most common type of virtual call in the kernel (DynamicCast)
by storing class token as a member, rather than getting it via virtual call every time.

This does not currently cost any memory space on 64-bit targets, due to pre-existing padding space.

This optimization can be turned off via a compile-time flag for accuracy.

master

1 parent 26c02e2 commit bfffe6b119dbc3300b7fb3f0bd1e310e72856f13

Michael Scire authored on 17 Oct 2021

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Ignore Space Show notes View libraries/libmesosphere/include/mesosphere/kern_build_config.hpp

Ignore Space Show notes View libraries/libmesosphere/include/mesosphere/kern_k_auto_object.hpp

Ignore Space Show notes View libraries/libmesosphere/source/kern_k_auto_object.cpp

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