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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/Devices/SerialDevice.cpp
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@ -45,7 +45,7 @@ bool SerialDevice::can_read(const FileDescription&, size_t) const
return (get_line_status() & DataReady) != 0;
}
ssize_t SerialDevice::read(FileDescription&, size_t, u8* buffer, ssize_t size)
KResultOr<size_t> SerialDevice::read(FileDescription&, size_t, u8* buffer, size_t size)
{
if (!size)
return 0;
@ -63,7 +63,7 @@ bool SerialDevice::can_write(const FileDescription&, size_t) const
return (get_line_status() & EmptyTransmitterHoldingRegister) != 0;
}
ssize_t SerialDevice::write(FileDescription&, size_t, const u8* buffer, ssize_t size)
KResultOr<size_t> SerialDevice::write(FileDescription&, size_t, const u8* buffer, size_t size)
{
if (!size)
return 0;