Kernel: Move block condition evaluation out of the Scheduler

This makes the Scheduler a lot leaner by not having to evaluate
block conditions every time it is invoked. Instead evaluate them as
the states change, and unblock threads at that point.

This also implements some more waitid/waitpid/wait features and
behavior. For example, WUNTRACED and WNOWAIT are now supported. And
wait will now not return EINTR when SIGCHLD is delivered at the
same time.

1 files changed, 8 insertions, 0 deletions

diff --git a/Kernel/Net/LocalSocket.h b/Kernel/Net/LocalSocket.h
index 30693283a3..3b9395d1a1 100644
--- a/Kernel/Net/LocalSocket.h
+++ b/Kernel/Net/LocalSocket.h
@@ -77,6 +77,14 @@ private:
     NonnullRefPtrVector<FileDescription>& sendfd_queue_for(const FileDescription&);
     NonnullRefPtrVector<FileDescription>& recvfd_queue_for(const FileDescription&);
 
+    void set_connect_side_role(Role connect_side_role, bool force_evaluate_block_conditions = false)
+    {
+        auto previous = m_connect_side_role;
+        m_connect_side_role = connect_side_role;
+        if (previous != m_connect_side_role || force_evaluate_block_conditions)
+            evaluate_block_conditions();
+    }
+
     // An open socket file on the filesystem.
     RefPtr<FileDescription> m_file;