From 90deb9fb438bf353af0a16c595533ff3ff17752e Mon Sep 17 00:00:00 2001
From: Bananymous <oskari.alaranta@bananymous.com>
Date: Fri, 9 Jan 2026 20:30:35 +0200
Subject: [PATCH] BAN: Make debug output thread safe

Now file lock is only acquired once per message, not once per character
---
 BAN/include/BAN/Debug.h | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/BAN/include/BAN/Debug.h b/BAN/include/BAN/Debug.h
index 2c9e656c..bb5c9250 100644
--- a/BAN/include/BAN/Debug.h
+++ b/BAN/include/BAN/Debug.h
@@ -9,29 +9,35 @@
 #include <BAN/Formatter.h>
 #include <stdio.h>
 
-#define __debug_putchar [](int c) { putc(c, stddbg); }
+#define __debug_putchar [](int c) { putc_unlocked(c, stddbg); }
 
 #define dprintln(...)											\
 	do {														\
+		flockfile(stddbg);										\
 		BAN::Formatter::print(__debug_putchar, __VA_ARGS__);	\
 		BAN::Formatter::print(__debug_putchar,"\n");			\
 		fflush(stddbg);											\
+		funlockfile(stddbg);									\
 	} while (false)
 
 #define dwarnln(...)											\
 	do {														\
+		flockfile(stddbg);										\
 		BAN::Formatter::print(__debug_putchar, "\e[33m");		\
 		BAN::Formatter::print(__debug_putchar, __VA_ARGS__);	\
 		BAN::Formatter::print(__debug_putchar, "\e[m\n");		\
 		fflush(stddbg);											\
+		funlockfile(stddbg);									\
 	} while(false)
 
 #define derrorln(...)											\
 	do {														\
+		flockfile(stddbg);										\
 		BAN::Formatter::print(__debug_putchar, "\e[31m");		\
 		BAN::Formatter::print(__debug_putchar, __VA_ARGS__);	\
 		BAN::Formatter::print(__debug_putchar, "\e[m\n");		\
 		fflush(stddbg);											\
+		funlockfile(stddbg);									\
 	} while(false)
 
 #define dprintln_if(cond, ...)		\