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Rework WindowServer to use select() in its main event loop.

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The system can finally idle without burning CPU. :^)

There are some issues with scheduling making the mouse cursor sloppy
and unresponsive that need to be dealt with.
This commit is contained in:
Andreas Kling 2019-01-16 17:20:58 +01:00
parent f7ca6d254d
commit 4fef895eda
Notes: sideshowbarker 2024-07-19 16:01:27 +09:00
15 changed files with 121 additions and 33 deletions
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20
Kernel/Process.cpp
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@ -1295,6 +1295,7 @@ int Process::sys$open(const char* path, int options)
if (number_of_open_file_descriptors() >= m_max_open_file_descriptors)
return -EMFILE;
int error = -EWHYTHO;
ASSERT(cwd_inode());
auto descriptor = VFS::the().open(path, error, options, cwd_inode()->identifier());
if (!descriptor)
return error;
@ -1960,8 +1961,15 @@ int Process::sys$select(const Syscall::SC_select_params* params)
transfer_fds(writefds, m_select_write_fds);
transfer_fds(readfds, m_select_read_fds);
block(BlockedSelect);
Scheduler::yield();
#ifdef DEBUG_IO
dbgprintf("%s<%u> selecting on (read:%u, write:%u)\n", name().characters(), pid(), m_select_read_fds.size(), m_select_write_fds.size());
#endif
if (!m_wakeup_requested) {
block(BlockedSelect);
Scheduler::yield();
}
m_wakeup_requested = false;
int markedfds = 0;
@ -1989,3 +1997,11 @@ int Process::sys$select(const Syscall::SC_select_params* params)
return markedfds;
}
Inode* Process::cwd_inode()
{
// FIXME: This is retarded factoring.
if (!m_cwd)
m_cwd = VFS::the().root_inode();
return m_cwd.ptr();
}