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mmap all the font files!
Font now uses the same in-memory format as the font files we have on disk. This allows us to simply mmap() the font files and not use any additional memory for them. Very cool! :^) Hacking on this exposed a bug in file-backed VMObjects where the first client to instantiate a VMObject for a specific inode also got to decide its size. Since file-backed VMObjects always have the same size as the underlying file, this made no sense, so I removed the ability to even set a size in that case.
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11 changed files with 134 additions and 110 deletions
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@ -79,7 +79,7 @@ private:
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class VMObject : public Retainable<VMObject> {
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friend class MemoryManager;
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public:
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static RetainPtr<VMObject> create_file_backed(RetainPtr<Inode>&&, size_t);
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static RetainPtr<VMObject> create_file_backed(RetainPtr<Inode>&&);
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static RetainPtr<VMObject> create_anonymous(size_t);
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static RetainPtr<VMObject> create_framebuffer_wrapper(PhysicalAddress, size_t);
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RetainPtr<VMObject> clone();
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@ -99,7 +99,7 @@ public:
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Vector<RetainPtr<PhysicalPage>>& physical_pages() { return m_physical_pages; }
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private:
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VMObject(RetainPtr<Inode>&&, size_t);
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VMObject(RetainPtr<Inode>&&);
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explicit VMObject(VMObject&);
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explicit VMObject(size_t);
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VMObject(PhysicalAddress, size_t);
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