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Kernel: Make UserOrKernelBuffer R/W helpers return KResultOr<size_t>

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This makes error propagation less cumbersome (and also exposed some
places where we were not doing it.)
This commit is contained in:
Andreas Kling 2021-05-13 09:08:44 +02:00
parent 25a45e639a
commit e46343bf9a
15 changed files with 64 additions and 85 deletions
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8
Kernel/TTY/VirtualConsole.cpp
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@ -226,14 +226,16 @@ void VirtualConsole::on_key_pressed(KeyEvent event)
ssize_t VirtualConsole::on_tty_write(const UserOrKernelBuffer& data, ssize_t size)
{
ScopedSpinLock lock(s_lock);
ssize_t nread = data.read_buffered<512>((size_t)size, [&](const u8* buffer, size_t buffer_bytes) {
auto result = data.read_buffered<512>((size_t)size, [&](u8 const* buffer, size_t buffer_bytes) {
for (size_t i = 0; i < buffer_bytes; ++i)
m_terminal.on_input(buffer[i]);
return (ssize_t)buffer_bytes;
return buffer_bytes;
});
if (m_active)
flush_dirty_lines();
return nread;
if (result.is_error())
return result.error();
return (ssize_t)result.value();
}
void VirtualConsole::set_vga_start_row(u16 row)