Core (lv-tool): Protect new display driver instances using unique_ptr #271
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…s with std::unique_ptr<>.
hartwork
reviewed
Feb 10, 2023
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| ~Impl () | ||
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| Display::Display (std::string const& driver_name) | ||
| : m_impl (new Impl) | ||
| : m_impl {new Impl {DisplayDriverFactory::instance().make (driver_name, *this)}} |
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@kaixiong we are passing *this here while this is in the middle of construction and not ready for any use beyond maybe holding a reference or pointer to it. We are sort-of doing that already before but… do we even need that? If it's out of scope, can it be resolved later?
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@hartwork good catch! I forgot about this but it's definitely safe with the current code since every driver class only stores the reference during their construction. But let me think about it more.
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DisplayDriverFactory::make()currently returns driver instances in raw pointers. This patch changes it to wrap them instd::unique_ptr.Note that the various constructors
stdout_driver_new(),stdout_sdl_driver_new(), etc. still return raw pointers. The driver code are meant to be externalised into loadable SOs and I'm unsure if we can returnstd::unique_ptrfrom there.