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Kernel: Add Inode::read_until_filled_or_end

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The existing `read_entire` is quite slow due to allocating and copying
multiple times, but it is simultaneously quite hard to get rid of in a
single step. As a replacement, add a new function that reads as much as
possible directly into a user-provided buffer.
This commit is contained in:
Tim Schumacher 2023-04-16 18:48:38 +02:00 • committed by Linus Groh
parent c403f8e92c
commit acd8c8dba4
2 changed files with 16 additions and 0 deletions
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Kernel/FileSystem/Inode.h
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@ -57,6 +57,7 @@ public:
ErrorOr<size_t> write_bytes(off_t, size_t, UserOrKernelBuffer const& data, OpenFileDescription*);
ErrorOr<size_t> read_bytes(off_t, size_t, UserOrKernelBuffer& buffer, OpenFileDescription*) const;
ErrorOr<size_t> read_until_filled_or_end(off_t, size_t, UserOrKernelBuffer buffer, OpenFileDescription*) const;
virtual ErrorOr<void> attach(OpenFileDescription&) { return {}; }
virtual void detach(OpenFileDescription&) { }