diff -r 25ead2ffb9b5 -r 0499bf03aef3 src/cx/buffer.h
--- a/src/cx/buffer.h	Thu Dec 11 17:08:17 2025 +0100
+++ b/src/cx/buffer.h	Thu Dec 11 22:43:13 2025 +0100
@@ -89,6 +89,13 @@
 #define CX_BUFFER_COPY_ON_EXTEND 0x08
 
 /**
+ * If this flag is enabled, the buffer will never free its contents regardless of #CX_BUFFER_FREE_CONTENTS.
+ *
+ * This is useful, for example, when you want to keep a pointer to the data after destroying the buffer.
+ */
+#define CX_BUFFER_DO_NOT_FREE 0x10
+
+/**
  * Function pointer for cxBufferWrite that is compatible with cx_write_func.
  * @see cx_write_func
  */