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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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6
Kernel/Devices/NullDevice.cpp
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@ -52,14 +52,14 @@ bool NullDevice::can_read(const FileDescription&, size_t) const
return true;
}
ssize_t NullDevice::read(FileDescription&, size_t, u8*, ssize_t)
KResultOr<size_t> NullDevice::read(FileDescription&, size_t, u8*, size_t)
{
return 0;
}
ssize_t NullDevice::write(FileDescription&, size_t, const u8*, ssize_t buffer_size)
KResultOr<size_t> NullDevice::write(FileDescription&, size_t, const u8*, size_t buffer_size)
{
return min(static_cast<ssize_t>(PAGE_SIZE), buffer_size);
return min(static_cast<size_t>(PAGE_SIZE), buffer_size);
}
}