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Kernel: Make File::write() and File::read() return KResultOr<size_t>

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Instead of returning a ssize_t where negative values mean error,
we now return KResultOr<size_t> and use the error state to report
errors exclusively.
This commit is contained in:
Andreas Kling 2020-08-04 18:02:23 +02:00
commit 7a3ab6c517
Notes: sideshowbarker 2024-07-19 04:18:56 +09:00
58 changed files with 223 additions and 229 deletions
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4
Kernel/Devices/MBVGADevice.h
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@ -47,8 +47,8 @@ private:
virtual const char* class_name() const override { return "MBVGA"; }
virtual bool can_read(const FileDescription&, size_t) const override { return true; }
virtual bool can_write(const FileDescription&, size_t) const override { return true; }
virtual ssize_t read(FileDescription&, size_t, u8*, ssize_t) override { return -EINVAL; }
virtual ssize_t write(FileDescription&, size_t, const u8*, ssize_t) override { return -EINVAL; }
virtual KResultOr<size_t> read(FileDescription&, size_t, u8*, size_t) override { return -EINVAL; }
virtual KResultOr<size_t> write(FileDescription&, size_t, const u8*, size_t) override { return -EINVAL; }
virtual bool read_blocks(unsigned, u16, u8*) override { return false; }
virtual bool write_blocks(unsigned, u16, const u8*) override { return false; }