From 7c11ea3694667c73c949e184a4ae24c4aa7f5213 Mon Sep 17 00:00:00 2001
From: Bananymous <bananymousosq@gmail.com>
Date: Thu, 7 Sep 2023 15:27:21 +0300
Subject: [PATCH] Kernel: Cleanup TTY::read()

---
 kernel/kernel/Terminal/TTY.cpp | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/kernel/kernel/Terminal/TTY.cpp b/kernel/kernel/Terminal/TTY.cpp
index bd5839cd..472343ce 100644
--- a/kernel/kernel/Terminal/TTY.cpp
+++ b/kernel/kernel/Terminal/TTY.cpp
@@ -251,14 +251,20 @@ namespace Kernel
 
 	BAN::ErrorOr<size_t> TTY::read(size_t, void* buffer, size_t count)
 	{
-		m_lock.lock();
+		LockGuard _(m_lock);
 		while (!m_output.flush)
 		{
 			m_lock.unlock();
 			m_output.semaphore.block();
 			m_lock.lock();
 		}
-		
+
+		if (m_output.bytes == 0)
+		{
+			m_output.flush = false;
+			return 0;
+		}
+
 		size_t to_copy = BAN::Math::min<size_t>(count, m_output.bytes);
 		memcpy(buffer, m_output.buffer.data(), to_copy);
 
@@ -270,8 +276,6 @@ namespace Kernel
 
 		m_output.semaphore.unblock();
 
-		m_lock.unlock();
-
 		return to_copy;
 	}