C Language Macro Expansion Rules: The Magic of Macros in the Linux Kernel
1. Basics of Macro Definition: The Essence of Text Replacement A macro is one of the core functionalities of the C language preprocessing phase, and it is essentially text replacement, expanded by the preprocessor before compilation. Basic Syntax #define macro_name replacement_text Example: #define PI 3.1415926 #define MAX(a, b) ((a) > (b) ? (a) : (b)) … Read more