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LibGfx: Make Gfx::Bitmap::set_nonvolatile() report allocation failure

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Making a bitmap non-volatile after being volatile may fail to allocate
physical pages after the kernel stole the old pages in a purge.

This is different from the pages being purged, but reallocated. In that
case, they are simply replaced with zero-fill-on-demand pages as if
they were freshly allocated.
This commit is contained in:
Andreas Kling 2021-07-24 22:49:48 +02:00
commit 143443e0b6
Notes: sideshowbarker 2024-07-18 08:22:11 +09:00
23 changed files with 57 additions and 46 deletions
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2
Userland/Libraries/LibGfx/PGMLoader.h
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@ -25,7 +25,7 @@ public:
virtual RefPtr<Gfx::Bitmap> bitmap() override;
virtual void set_volatile() override;
[[nodiscard]] virtual bool set_nonvolatile() override;
[[nodiscard]] virtual bool set_nonvolatile(bool& was_purged) override;
virtual bool sniff() override;