From 3980d30d28951edcc34d16758d549bc4d4ab193e Mon Sep 17 00:00:00 2001
From: _ov4 <ov4@ov4.org>
Date: Tue, 15 Sep 2026 02:07:05 +0000
Subject: add safe_logger, and prepare for logical operators

---
 include/util/io.h | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

(limited to 'include/util/io.h')

diff --git a/include/util/io.h b/include/util/io.h
index e995af5..5c0a129 100644
--- a/include/util/io.h
+++ b/include/util/io.h
@@ -99,6 +99,22 @@ void safe_output(T x, T_arg ...arg)
     errno = errno_old;
 }
 
+// async-signal-safe output function
+// example:
+// safe_output("string", 123, variable);
+template <typename ...T_arg>
+void safe_logger(T_arg ...arg)
+{
+    int errno_old = errno;
+
+    if (GLOBAL_DEBUG && verbose)
+    {
+        safe_output(arg...);
+    }
+
+    errno = errno_old;
+}
+
 void unix_error(const char *msg);
 void app_error(const char *msg);
 
-- 
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