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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
parent 58feebeed2
commit 7a3ab6c517
58 changed files with 223 additions and 229 deletions
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4
Kernel/FileSystem/File.h
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@ -74,8 +74,8 @@ public:
virtual bool can_read(const FileDescription&, size_t) const = 0;
virtual bool can_write(const FileDescription&, size_t) const = 0;
virtual ssize_t read(FileDescription&, size_t, u8*, ssize_t) = 0;
virtual ssize_t write(FileDescription&, size_t, const u8*, ssize_t) = 0;
virtual KResultOr<size_t> read(FileDescription&, size_t, u8*, size_t) = 0;
virtual KResultOr<size_t> write(FileDescription&, size_t, const u8*, size_t) = 0;
virtual int ioctl(FileDescription&, unsigned request, FlatPtr arg);
virtual KResultOr<Region*> mmap(Process&, FileDescription&, VirtualAddress preferred_vaddr, size_t offset, size_t size, int prot, bool shared);