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Kernel/LibC: Implement basic epoll

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This implementation is on top of inodes instead of fds as linux does it.
If I start finding ports/software that relies on epoll allowing
duplicate inodes, I will do what linux does.

I'm probably missing multiple epoll_notify's which may cause hangs but
the system seems to work fine :dd:
This commit is contained in:
Bananymous
2025-05-13 10:10:35 +03:00
parent 143a00626b
commit 1bcd1edbf5
43 changed files with 627 additions and 119 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
kernel/kernel/Terminal/PseudoTerminal.cpp
View File

@@ -4,6 +4,7 @@
#include <BAN/ScopeGuard.h>
#include <sys/epoll.h>
#include <sys/ioctl.h>
#include <sys/sysmacros.h>
@@ -95,6 +96,8 @@ namespace Kernel
reinterpret_cast<uint8_t*>(m_buffer->vaddr())[(m_buffer_tail + m_buffer_size) % m_buffer->size()] = ch;
m_buffer_size++;
epoll_notify(EPOLLIN);
m_buffer_blocker.unblock();
return true;
@@ -127,6 +130,8 @@ namespace Kernel
m_buffer_size -= to_copy;
m_buffer_tail = (m_buffer_tail + to_copy) % m_buffer->size();
epoll_notify(EPOLLOUT);
m_buffer_lock.unlock(state);
return to_copy;
@@ -137,7 +142,6 @@ namespace Kernel
auto slave = m_slave.lock();
if (!slave)
return BAN::Error::from_errno(ENODEV);
for (size_t i = 0; i < buffer.size(); i++)
slave->handle_input_byte(buffer[i]);
return buffer.size();

4
kernel/kernel/Terminal/TTY.cpp
View File

@@ -15,6 +15,7 @@
#include <string.h>
#include <stropts.h>
#include <sys/banan-os.h>
#include <sys/epoll.h>
#include <sys/sysmacros.h>
namespace Kernel
@@ -40,6 +41,7 @@ namespace Kernel
bool can_read_impl() const override { return false; }
bool can_write_impl() const override { return false; }
bool has_error_impl() const override { return false; }
bool has_hangup_impl() const override { return false; }
private:
DevTTY(mode_t mode, uid_t uid, gid_t gid)
@@ -238,6 +240,7 @@ namespace Kernel
if (ch == '\x04' && (m_termios.c_lflag & ICANON))
{
m_output.flush = true;
epoll_notify(EPOLLIN);
m_output.thread_blocker.unblock();
return;
}
@@ -280,6 +283,7 @@ namespace Kernel
if (ch == '\n' || !(m_termios.c_lflag & ICANON))
{
m_output.flush = true;
epoll_notify(EPOLLIN);
m_output.thread_blocker.unblock();
}
}