mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-11-22 15:40:19 +00:00
19d3f8cab7
..and allow implicit creation of KResult and KResultOr from ErrnoCode. This means that kernel functions that return those types can finally do "return EINVAL;" and it will just work. There's a handful of functions that still deal with signed integers that should be converted to return KResults.
98 lines
2.9 KiB
C++
98 lines
2.9 KiB
C++
/*
|
|
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright notice, this
|
|
* list of conditions and the following disclaimer.
|
|
*
|
|
* 2. Redistributions in binary form must reproduce the above copyright notice,
|
|
* this list of conditions and the following disclaimer in the documentation
|
|
* and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
|
|
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
|
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <AK/Singleton.h>
|
|
#include <Kernel/Console.h>
|
|
#include <Kernel/IO.h>
|
|
#include <Kernel/SpinLock.h>
|
|
#include <Kernel/kstdio.h>
|
|
|
|
// Bytes output to 0xE9 end up on the Bochs console. It's very handy.
|
|
#define CONSOLE_OUT_TO_E9
|
|
|
|
static AK::Singleton<Console> s_the;
|
|
static Kernel::SpinLock g_console_lock;
|
|
|
|
void Console::initialize()
|
|
{
|
|
s_the.ensure_instance();
|
|
}
|
|
|
|
Console& Console::the()
|
|
{
|
|
return *s_the;
|
|
}
|
|
|
|
bool Console::is_initialized()
|
|
{
|
|
return s_the.is_initialized();
|
|
}
|
|
|
|
Console::Console()
|
|
: CharacterDevice(5, 1)
|
|
{
|
|
}
|
|
|
|
Console::~Console()
|
|
{
|
|
}
|
|
|
|
bool Console::can_read(const Kernel::FileDescription&, size_t) const
|
|
{
|
|
return false;
|
|
}
|
|
|
|
Kernel::KResultOr<size_t> Console::read(Kernel::FileDescription&, size_t, Kernel::UserOrKernelBuffer&, size_t)
|
|
{
|
|
// FIXME: Implement reading from the console.
|
|
// Maybe we could use a ring buffer for this device?
|
|
return 0;
|
|
}
|
|
|
|
Kernel::KResultOr<size_t> Console::write(Kernel::FileDescription&, size_t, const Kernel::UserOrKernelBuffer& data, size_t size)
|
|
{
|
|
if (!size)
|
|
return 0;
|
|
|
|
ssize_t nread = data.read_buffered<256>(size, [&](const u8* bytes, size_t bytes_count) {
|
|
for (size_t i = 0; i < bytes_count; i++)
|
|
put_char((char)bytes[i]);
|
|
return (ssize_t)bytes_count;
|
|
});
|
|
if (nread < 0)
|
|
return Kernel::KResult((ErrnoCode)-nread);
|
|
return (size_t)nread;
|
|
}
|
|
|
|
void Console::put_char(char ch)
|
|
{
|
|
Kernel::ScopedSpinLock lock(g_console_lock);
|
|
#ifdef CONSOLE_OUT_TO_E9
|
|
//if (ch != 27)
|
|
IO::out8(0xe9, ch);
|
|
#endif
|
|
m_logbuffer.enqueue(ch);
|
|
}
|